US3678925A - Connector for fractured bones - Google Patents
Connector for fractured bones Download PDFInfo
- Publication number
- US3678925A US3678925A US77267A US3678925DA US3678925A US 3678925 A US3678925 A US 3678925A US 77267 A US77267 A US 77267A US 3678925D A US3678925D A US 3678925DA US 3678925 A US3678925 A US 3678925A
- Authority
- US
- United States
- Prior art keywords
- sleeve
- expander
- screw
- connector
- expanding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/74—Devices for the head or neck or trochanter of the femur
- A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/7258—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone
- A61B17/7266—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone with fingers moving radially outwardly
Definitions
- ABSTRACT A sleeve is to be inserted into a fractured bone bridging the fracture thereof. The leading end portion is then to be located in one bone fragment and the open trailing end portion is to communicate with the exterior of the other bone fragment.
- An expander screw is threaded into the sleeve and has a head which bears exclusively upon an annular shoulder provided on the sleeve. The front end of the expander screw serves, by its configuration or by cooperation with an expander element, for
- a cap screw is threadedly connected with and closes the trailing end portion of the sleeve, bearing upon the other bone fragment and thereby drawing the two fragments together via the intermediary of the sleeve.
- the present invention relates generally to a connector for fractured bones, and in particular to a connector for use in case of fractures of the neck of the femur, that is the upper thigh bone.
- an object of the present invention to provide a connector for bone fragments, particularly but not exclusively for fractured femurs, which is not possessed of these disadvantages.
- a concomitant object of the invention is to provide such a connector which makes it possible to immediately put stress on the fractured bone without doing any damage.
- a connector for fractured bones which comprises a sleeve adapted for insertion into a fractured bone bridging the fracture thereof, and having a leading end portion adapted to be located in one bone fragment and an open trailing end portion adapted to communicate with the exterior of the other bone fragment.
- Expander means is provided for expanding the leading end portion and includes an expander screw threaded through the sleeve and having a head portion located within the trailing end portion engaging and bearing only upon the same when the screw is rotated in a sense effecting expanding of the leading end portion.
- a cap screw is threadedly connected with and closes the trailing end portion of the sleeve.
- a connector constructed according to the present invention fulfills the requirements which have been outlined above. It can be readily installed in that a nail is first driven in conventional manner into the two bone fragments to be connected. In the case of a fractured femur the nail is driven centrally at the requisite angle into the neck of the femur. Now the sleeve of the connector according to the present invention is placed around the nail and driven into the bone, and subsequently the nail is withdrawn because it is no longer needed. The expander means is now utilized for expanding the leading end portion of the sleeve whereby the latter is anchored in the bone.
- the head of the expanding screw bears only upon the sleeve itself so that the entire axial force necessary for effecting the expansion of the leading end portion of the sleeve acts only upon the latter, and not upon the bone. This prevents damage to the bone.
- the cap screw is threaded onto or into the trailing end of the sleeve and its cap screw head engages and bears upon the exterior of that bone fragment in which the end portion of the sleeve is embedded. Turning of the cap screw in a sense threading it more deeply onto the sleeve exerts pull upon the sleeve whereby the two bone fragments are drawn together and the gap at their fracture line is reduced or eliminated.
- the bone fragments should touch each other at the fracture line and in this manner the bone fracture will heal much more rapidly than heretofore possible.
- the bone fragments now are in contact with one another rather than being spaced from one another as in the prior art, so that stress can immediately be placed on the fractured bone once it has been connected with the connector according to the present invention. 7
- the connector is no longer needed. At that time, therefore, the cap screw is unthreaded from the sleeve, and the expanding screw is similarly unthreaded and removed.
- the expander member if a separate one has been employed which of course is located at the leading end of the sleeve, is dislodged in suitable manner, for instance by exerting a brief blow upon the screw before the latter is unthreaded, so that the expander member returns to its original position and permits the leading end of the sleeve to resiliently return to its original configuration, making it possible to subsequently remove the sleeve also.
- the rear or trailing portion of the sleeve has a stepped outer diameter, meaning that its outer diameter is less than that of the remainder of the sleeve.
- This portion of reduced outer diameter is provided with external screw threads which mesh with internal screw threads in the tubular stem of the cap screw whose outer diameter corresponds to the outer diameter of the remainder of the sleeve.
- leading end portion of the sleeve at its open leading end with an inwardly directed flange which prevents the undesired emergence from this leading end of the expander member, and consequently prevents the expander member from becoming dislodged from the sleeve.
- the leading end portion of the sleeve which is to be expanded may be surrounded with an elastic jacket.
- an elastic jacket makes the formation of callus in and around the segments impossible so that they can return to their original undeflected position when the expander member is dislodged, and the sleeve can then be properly removed.
- the front portion of the expander screw is also possible to construct the front portion of the expander screw as a pin having a conical or otherwise configurated leading end which, when the screw is threaded deeper into the sleeve, serves to expand the expander member itself rather than drawing the latter into the sleeve for expanding the same.
- the connector according to the present invention can be successfully used even for repairing bone fractures in children without unduly weakening the bones of children-which are not yet very large-with'a large hole driven into them.
- thecap screw in such a manner that its stem does not exteriorly surround the trailing or rear end portion of the sleeve, but instead fits into the interior of the latter.
- the stem of the cap screw must be exteriorly threaded to mesh with interior threads of the sleeve, and according to the invention the threads onthe stem and the threads on the expander screw, or on the screw portion of the expander pin, will be identical whereby a simple and inexpensive manufacture of the various components is further facilitated.
- FIG. 1 is a diagrammatic sectioned illustration showing one embodiment of the invention connecting the fragments of a fractured femur;
- FIG. 2 is a view similar to FIG. 1 but showing another embodiment of the invention.
- reference numerals 6 and 6' identify the two bone fragments into which a femur has become separated due to a fracture.
- these two bone fragments have been properly aligned with reference to one another in the manner in which they were originally positioned when the bone was not yet fractured In this manner they are connected by means of the illustrated connector according to one embodiment of the invention.
- Reference numeral 1 identifies the connector in toto and it is to be understood that preferably the components of the connector are manufactured of rust-free steel, for instance of steel known under the designation V2A or that known under the designation V4A.
- the connector 1 comprises an expansion sleeve 2, whose front end portion is driven into the bone fragment 6, whereas its rear end portion is located in the bone fragment 6 through which the front end portion was originally driven.
- the rear end of the trailing or rear end portion of the sleeve 2 is open to the exterior of the bone fragment 6', as illustrated.
- an expander portion 3 Located at the front end portion of the sleeve 2 is an expander portion 3, and the rear end portion which is stepped, that is which has a lesser outer diameter than the remainder of the sleeve 2, is identified with reference numeral 4. It is also exteriorly threaded and an interiorly threaded tubular stem of a cap screw can be threaded onto it as shown in FIG. 1.
- an expander element 7 which can mesh with the expander screw 8 threaded into the interior of the sleeve 2.
- the head 9 of the expander screw 8 is of such dimensions that it engages the rear end face at the rear end of the sleeve 2 as shown in the drawing, or else it can actually be located within the sleeve and engage an inner annular shoulder provided for this purpose.
- the sleeve 2 is exteriorly provided with projections 10 or other similar means for preventing its rotation with reference to the bone fragments 6, 6.
- the cap screw is threaded onto the trailing end portion 4 of the sleeve 2.
- the cap screw 5 is provided with a cap screw head or flange 11 which bears upon the exterior of the bone fragment 6'.
- a washer 12 As illustrated.
- annular groove I3 is provided on the sleeve 2 exteriorly encircling the same at the junction with the expander portion 3.
- An elastically deflectable jacket 14 is pushed onto and surrounds the expander portion 3 and is expanded together with the latter, the purpose being to prevent the growth of callus between the sections of the expander portion 3. The jacket 14 is removed together with the sleeve 2 when the fracture is healed.
- the expansion of the expander portion 3 is effected by constructing the expander memberv 7a as an actual portion of the screw serving for expanding purposes, or, putting it conversely, to construct the screw in a pin-shaped configuration having a tapering leading end 17 as illustrated and an exteriorly threaded head 15 which meshes with the interior threads in the sleeve 2.
- the expander portion 3, having a bore corresponding to the tapering configuration of the leading end portion 17, is expanded by threading thev screw head 15 deeper into the sleeve 2 in a sense advancing the pin 7a forwardly, that is towards the left in FIG. 2.
- the bone fragments 6 and 6' are drawn together into abutment by threading the cap screw 5a into the interior threads of the sleeve 2 as illustrated.
- the stem of the cap screw is exteriorly threaded as will be appreciated.
- Reference numeral 16 identifies a slot in the head 15 of the pin 7a for facilitating turning of the latter.
- the washer 12a can be configurated in such a manner--compare the single or plural projections l2b--that it will serve not only to increase the abutment'surface between the head of the cap screw 5a and the bone fragment 6', but also will serve as a retaining element for preventing undesired loosening of the cap screw 5a for which purpose it is provided-in addition to the projections l2bwith a tongue 12cv engaging and preventing turning of the head of the cap screw 5a.
- a further advantage is the fact that the connector according to the present inven tion has an identical diameter over its entire exterior-this being true in FIG. 1 also when the cap screw is connected with the sleeve-and thereby can be produced in a simple and relatively inexpensive manner, and also can be very readily and simply inserted into the bone fragments.
- Sleeve 14 may be of synthetic plastic, elastically deflectable steel, or the like.
- a connector for fractured bones comprising a sleeve adapted for inserting into a fractured bone bridging the fracture thereof, and having a leading portion adapted to be located in one bone fragment and an open trailing portion adapted to communicate with the exterior of the other bone fragment and provided with an endface and with internal threads inwardly of said endface; expander means for expanding said leading portion, and including an expander screw threaded through said sleeve and having a head portion located in said trailing portion axially bearing upon the same when said screw is rotated in a sense effecting expanding of said leading portion; and a cap screw having a stem threaded into said trailing portion of said sleeve and a cap screw head adapted to exteriorly engage and bear upon said other bone fragment, the threads of said screws being identical.
- said expander means including an expander element, and cooperating engaging means on said element and said expander screw for drawing the former into said sleeve in a sense expanding the same in response to rotation of said expander screw.
- said expander means comprising an expander member, and an expander pin portion on said screw operative for expanding said expander member in response to advancement of said expander pin portion longitudinally of said sleeve due to rotation of said expander screw.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
A sleeve is to be inserted into a fractured bone bridging the fracture thereof. The leading end portion is then to be located in one bone fragment and the open trailing end portion is to communicate with the exterior of the other bone fragment. An expander screw is threaded into the sleeve and has a head which bears exclusively upon an annular shoulder provided on the sleeve. The front end of the expander screw serves, by its configuration or by cooperation with an expander element, for expanding the leading end of the sleeve so as to retain it in the bone fragment in which it is located. A cap screw is threadedly connected with and closes the trailing end portion of the sleeve, bearing upon the other bone fragment and thereby drawing the two fragments together via the intermediary of the sleeve.
Description
United States Patent Fischer et al.
[451 July 25,1972
[54] CONNECTOR FOR F RACTURED BONES Altheimer Str. 219, Jean-Nicolas [72] Inventors: Artur Fischer,
Tumlingen, Germany; Muller, Strassburg, France [73] Assignee: said Fischer, by said Muller [22] Filed: Oct. 1, 1970 [21] Appl. No.: 77,267
[30] Foreign Application Priority Data Oct. 3, 1969 Germany ..P 19 49 922.0 Dec. 29, 1969 Germany ..P 19 65 350.0
[52] U.S. Cl. ..128/92 BB [51] Int. Cl. ...A61f 5/04 [58] Field of Search 128/92 BB, 92 R, 92 CA, 92 BC, 128/92 B, 92 D [56] References Cited UNITED STATES PATENTS 2,381,050 8/1945 Hardinge ..128/92 BB 2,699,774 1/1955 Livingston ..128/92 BB 2,243,717 5/1941 Moreira ..128/92 BB 2,121,193 6/1938 Hanicke ....l28/92 BB 2,490,364 l2/1949 Livingston ..128/92 BB Primal Examiner-Richard A. Gaudet Assistant Examiner.l. Yasko Attorney-Michael S. Striker [5 7] ABSTRACT A sleeve is to be inserted into a fractured bone bridging the fracture thereof. The leading end portion is then to be located in one bone fragment and the open trailing end portion is to communicate with the exterior of the other bone fragment. An expander screw is threaded into the sleeve and has a head which bears exclusively upon an annular shoulder provided on the sleeve. The front end of the expander screw serves, by its configuration or by cooperation with an expander element, for
expanding the leading end of the sleeve so as to retain it in the bone fragment in which it is located. A cap screw is threadedly connected with and closes the trailing end portion of the sleeve, bearing upon the other bone fragment and thereby drawing the two fragments together via the intermediary of the sleeve.
6 Claims, 2 Drawing figures Patented July 25, 1972 3,678,925
//2 V8 for. I
g I f/ortl/ 1 CONNECTOR FOR FRACTURED BONES BACKGROUND OF THE INVENTION The present invention relates generally to a connector for fractured bones, and in particular to a connector for use in case of fractures of the neck of the femur, that is the upper thigh bone.
When a bone is fractured, that is when it is cracked and broken in two pieces-a so-called simple fracture as opposed to a compound fracture" where there is more than one break but in which case the general principle to be discussed here is also applicableit must be connected together in its normal position while it mends. In many instances, including where it is necessary to repair a fracture of the femur or upper thigh bone which hereafter will be used for purposes of explaining the background as well as the present invention, it is customary to drive a nail or pin under a requisite specific angle to the femur into the neck of the femur. This connects the broken-off neck with the remainder of the femur and locates the two bone fragments in their requisite relative position until such natural healing processes-Le. the formation of callus have permanently reunited the two bone fragments.
The problem with this prior-art approach is that while the two bone fragments can be located in proper position relative to one another, it is not possible to draw them together to such an extent as to eliminate the cap at the fracture line. This, however, is desirable because the smaller the cap ismeaning the closer the juxtaposed surfaces of the two bone fragments are-the more readily healing will occur and the formation of callus will take place. According to the prior art, however, it is not only not possible to reduce the gap but in fact the gap is somewhat increased as a result of driving the nail into the two bone fragments.
SUMMARY OF THE INVENTION It is, accordingly, an object of the present invention to provide a connector for bone fragments, particularly but not exclusively for fractured femurs, which is not possessed of these disadvantages.
Still more specifically it is an object of the present invention to provide such a connector which will so connect the bone fragments as to speed the healing process which reconnects the fragments into a unitary bone.
A concomitant object of the invention is to provide such a connector which makes it possible to immediately put stress on the fractured bone without doing any damage.
In pursuance of the above objects, and others which will become apparent hereafter, one feature of the invention recites, briefly stated, in a connector for fractured bones which comprises a sleeve adapted for insertion into a fractured bone bridging the fracture thereof, and having a leading end portion adapted to be located in one bone fragment and an open trailing end portion adapted to communicate with the exterior of the other bone fragment. Expander means is provided for expanding the leading end portion and includes an expander screw threaded through the sleeve and having a head portion located within the trailing end portion engaging and bearing only upon the same when the screw is rotated in a sense effecting expanding of the leading end portion. A cap screw is threadedly connected with and closes the trailing end portion of the sleeve.
A connector constructed according to the present invention fulfills the requirements which have been outlined above. It can be readily installed in that a nail is first driven in conventional manner into the two bone fragments to be connected. In the case of a fractured femur the nail is driven centrally at the requisite angle into the neck of the femur. Now the sleeve of the connector according to the present invention is placed around the nail and driven into the bone, and subsequently the nail is withdrawn because it is no longer needed. The expander means is now utilized for expanding the leading end portion of the sleeve whereby the latter is anchored in the bone. According to the invention the head of the expanding screw bears only upon the sleeve itself so that the entire axial force necessary for effecting the expansion of the leading end portion of the sleeve acts only upon the latter, and not upon the bone. This prevents damage to the bone. Now the cap screw is threaded onto or into the trailing end of the sleeve and its cap screw head engages and bears upon the exterior of that bone fragment in which the end portion of the sleeve is embedded. Turning of the cap screw in a sense threading it more deeply onto the sleeve exerts pull upon the sleeve whereby the two bone fragments are drawn together and the gap at their fracture line is reduced or eliminated. Preferably the bone fragments should touch each other at the fracture line and in this manner the bone fracture will heal much more rapidly than heretofore possible. Moreover, the bone fragments now are in contact with one another rather than being spaced from one another as in the prior art, so that stress can immediately be placed on the fractured bone once it has been connected with the connector according to the present invention. 7
When the bone fragments are reunited, that is when the fracture is healed, the connector is no longer needed. At that time, therefore, the cap screw is unthreaded from the sleeve, and the expanding screw is similarly unthreaded and removed. The expander member, if a separate one has been employed which of course is located at the leading end of the sleeve, is dislodged in suitable manner, for instance by exerting a brief blow upon the screw before the latter is unthreaded, so that the expander member returns to its original position and permits the leading end of the sleeve to resiliently return to its original configuration, making it possible to subsequently remove the sleeve also.
According to one embodiment of the invention the rear or trailing portion of the sleeve has a stepped outer diameter, meaning that its outer diameter is less than that of the remainder of the sleeve. This portion of reduced outer diameter is provided with external screw threads which mesh with internal screw threads in the tubular stem of the cap screw whose outer diameter corresponds to the outer diameter of the remainder of the sleeve. Thus the hole which is formed in the bone as the sleeve is driven into it, will already have sufficient diameter to accommodate the cap screw when the latter is to be threaded onto the trailing end portion of the sleeve.
It is also possible in accordance with a further embodiment of the invention to provide the leading end portion of the sleeve at its open leading end with an inwardly directed flange which prevents the undesired emergence from this leading end of the expander member, and consequently prevents the expander member from becoming dislodged from the sleeve.
According to still another embodiment of the invention the leading end portion of the sleeve which is to be expanded may be surrounded with an elastic jacket. The reason for this is that it has been found that the formation of callus during healing takes place not only at the fracture but also between the segments of the leading end portion of the sleeve, it being understood that this leading end portion will normally be axially slotted to subdivide it into a plurality of segments or tongues in order to permit more ready expansion when needed. The formation of callus between the segments, however, would prevent proper elastic return of the segments to their original position when it is desired to dislodge the sleeve after healing. In fact, it might make such return impossible and would then force the sleeve to remain in the bone. The use of an elastic jacket, however, makes the formation of callus in and around the segments impossible so that they can return to their original undeflected position when the expander member is dislodged, and the sleeve can then be properly removed.
It is also possible to construct the front portion of the expander screw as a pin having a conical or otherwise configurated leading end which, when the screw is threaded deeper into the sleeve, serves to expand the expander member itself rather than drawing the latter into the sleeve for expanding the same. In such a construction it is possible not only to obtain good expanding action but also to make all components involved, including the outer diameter of the sleeve, very small so that the connector according to the present invention can be successfully used even for repairing bone fractures in children without unduly weakening the bones of children-which are not yet very large-with'a large hole driven into them.
Also, it is possible to configurate thecap screw in such a manner that its stem does not exteriorly surround the trailing or rear end portion of the sleeve, but instead fits into the interior of the latter. In this case of course the stem of the cap screw must be exteriorly threaded to mesh with interior threads of the sleeve, and according to the invention the threads onthe stem and the threads on the expander screw, or on the screw portion of the expander pin, will be identical whereby a simple and inexpensive manufacture of the various components is further facilitated.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a diagrammatic sectioned illustration showing one embodiment of the invention connecting the fragments of a fractured femur; and
FIG. 2 is a view similar to FIG. 1 but showing another embodiment of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Discussing now firstly the embodiment illustrated in FIG. 1 it will be seen that reference numerals 6 and 6' identify the two bone fragments into which a femur has become separated due to a fracture. In the drawing these two bone fragments have been properly aligned with reference to one another in the manner in which they were originally positioned when the bone was not yet fractured In this manner they are connected by means of the illustrated connector according to one embodiment of the invention. Reference numeral 1 identifies the connector in toto and it is to be understood that preferably the components of the connector are manufactured of rust-free steel, for instance of steel known under the designation V2A or that known under the designation V4A. The connector 1 comprises an expansion sleeve 2, whose front end portion is driven into the bone fragment 6, whereas its rear end portion is located in the bone fragment 6 through which the front end portion was originally driven. The rear end of the trailing or rear end portion of the sleeve 2 is open to the exterior of the bone fragment 6', as illustrated.
Located at the front end portion of the sleeve 2 is an expander portion 3, and the rear end portion which is stepped, that is which has a lesser outer diameter than the remainder of the sleeve 2, is identified with reference numeral 4. It is also exteriorly threaded and an interiorly threaded tubular stem of a cap screw can be threaded onto it as shown in FIG. 1.
Located within the expander portion 3, which is for instance created by providing the leading end portion of the sleeve 2 with axially extending circumferentially spaced slots to subdivide it into individual tongues or sections, is an expander element 7 which can mesh with the expander screw 8 threaded into the interior of the sleeve 2. The head 9 of the expander screw 8 is of such dimensions that it engages the rear end face at the rear end of the sleeve 2 as shown in the drawing, or else it can actually be located within the sleeve and engage an inner annular shoulder provided for this purpose. In any case, as the screw 8 is threaded into the sleeve 2 in a sense drawing the expander element 7 rearwardly into the sleeve and thereby expanding the expander portion 3 due to the entry of the divergent expander element 7, the axial forces necessary to effect such expansion are transmitted exclusively into the sleeve 2 by virtue of the fact that the head 9 of the screw 8 bears only upon the sleeve 2.
Preferably, although not necessarily, the sleeve 2 is exteriorly provided with projections 10 or other similar means for preventing its rotation with reference to the bone fragments 6, 6.
Once the expander portion 3 has been expanded, the cap screw is threaded onto the trailing end portion 4 of the sleeve 2. In order to be able to transmit the necessary torque required for drawing the bone fragments 6,6 together until they abut at the fracture line, the cap screw 5 is provided with a cap screw head or flange 11 which bears upon the exterior of the bone fragment 6'. To increase the surface with which the flange 11 can bear upon the bone fragment 6 it is possible to provide a washer 12 as illustrated.
To increase the elasticity and ability for radially outward deflection of the expander portion 3, an annular groove I3 is provided on the sleeve 2 exteriorly encircling the same at the junction with the expander portion 3. An elastically deflectable jacket 14 is pushed onto and surrounds the expander portion 3 and is expanded together with the latter, the purpose being to prevent the growth of callus between the sections of the expander portion 3. The jacket 14 is removed together with the sleeve 2 when the fracture is healed.
In the embodiment of FIG. 2 like elements are identified with like reference numerals. Here, however, the expansion of the expander portion 3 is effected by constructing the expander memberv 7a as an actual portion of the screw serving for expanding purposes, or, putting it conversely, to construct the screw in a pin-shaped configuration having a tapering leading end 17 as illustrated and an exteriorly threaded head 15 which meshes with the interior threads in the sleeve 2. In this case the expander portion 3, having a bore corresponding to the tapering configuration of the leading end portion 17, is expanded by threading thev screw head 15 deeper into the sleeve 2 in a sense advancing the pin 7a forwardly, that is towards the left in FIG. 2.
Once anchoring is accomplished, the bone fragments 6 and 6' are drawn together into abutment by threading the cap screw 5a into the interior threads of the sleeve 2 as illustrated. Of course, in this case the stem of the cap screw is exteriorly threaded as will be appreciated. Reference numeral 16 identifies a slot in the head 15 of the pin 7a for facilitating turning of the latter. As the head of the cap screw 5a bears upon the exterior of the bone fragment 6', the sleeve 2 is drawn in the direction towards this head and thereby the bone fragment 6 is drawn into tight abutment with the bone fragment 6. FIG. 2 also shows that the washer 12a can be configurated in such a manner--compare the single or plural projections l2b--that it will serve not only to increase the abutment'surface between the head of the cap screw 5a and the bone fragment 6', but also will serve as a retaining element for preventing undesired loosening of the cap screw 5a for which purpose it is provided-in addition to the projections l2bwith a tongue 12cv engaging and preventing turning of the head of the cap screw 5a.
In addition to the advantages which already have been out lined as afiorded by the present invention, a further advantage is the fact that the connector according to the present inven tion has an identical diameter over its entire exterior-this being true in FIG. 1 also when the cap screw is connected with the sleeve-and thereby can be produced in a simple and relatively inexpensive manner, and also can be very readily and simply inserted into the bone fragments.
While it has been pointed out that the constituent components of the connector are advantageously made of rustfree or stainless steel, such as V2A or V4A, it will be appreciated that other materials may also be suitable and are intended to be included in the scope and concept of this disclosure. Sleeve 14 may be of synthetic plastic, elastically deflectable steel, or the like.
It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.
While the invention has been illustrated and described as embodied in a connecting element for bone fragments, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.
We claim:
1. A connector for fractured bones, comprising a sleeve adapted for inserting into a fractured bone bridging the fracture thereof, and having a leading portion adapted to be located in one bone fragment and an open trailing portion adapted to communicate with the exterior of the other bone fragment and provided with an endface and with internal threads inwardly of said endface; expander means for expanding said leading portion, and including an expander screw threaded through said sleeve and having a head portion located in said trailing portion axially bearing upon the same when said screw is rotated in a sense effecting expanding of said leading portion; and a cap screw having a stem threaded into said trailing portion of said sleeve and a cap screw head adapted to exteriorly engage and bear upon said other bone fragment, the threads of said screws being identical.
2. A connector as defined in claim 1, said sleeve having an inner annular shoulder in said trailing portion, and said head engaging and axially bearing upon said inner annular shoulder when said expander screw is rotated for expanding said leading portion.
3. A connector as defined in claim I, wherein said sleeve, expander means and cap screw consist of rustfree steel and acid-resistant steel.
4. A connector as defined in claim 1, said sleeve having a radially inwardly extending flange at the leading open of said leading end portion.
5. A connector as defined in claim 1, said expander means including an expander element, and cooperating engaging means on said element and said expander screw for drawing the former into said sleeve in a sense expanding the same in response to rotation of said expander screw.
6. A connector as defined in claim 1, said expander means comprising an expander member, and an expander pin portion on said screw operative for expanding said expander member in response to advancement of said expander pin portion longitudinally of said sleeve due to rotation of said expander screw.
Claims (6)
1. A connector for fractured bones, comprising a sleeve adapted for inserting into a fractured bone bridging the fracture thereof, and having a leading portion adapted to be located in one bone fragment and an open trailing portion adapted to communicate with the exterior of the other bone fragment and provided with an endface and with internal threads inwardly of said endface; expander means for expanding said leading portion, and including an expander screw threaded through said sleeve and having a head portion located in said trailing portion axially bearing upon the same when said screw is rotated in a sense effecting expanding of said leading portion; and a cap screw having a stem threaded into said trailing portion of said sleeve and a cap screw hEad adapted to exteriorly engage and bear upon said other bone fragment, the threads of said screws being identical.
2. A connector as defined in claim 1, said sleeve having an inner annular shoulder in said trailing portion, and said head engaging and axially bearing upon said inner annular shoulder when said expander screw is rotated for expanding said leading portion.
3. A connector as defined in claim 1, wherein said sleeve, expander means and cap screw consist of rustfree steel and acid-resistant steel.
4. A connector as defined in claim 1, said sleeve having a radially inwardly extending flange at the leading open of said leading end portion.
5. A connector as defined in claim 1, said expander means including an expander element, and cooperating engaging means on said element and said expander screw for drawing the former into said sleeve in a sense expanding the same in response to rotation of said expander screw.
6. A connector as defined in claim 1, said expander means comprising an expander member, and an expander pin portion on said screw operative for expanding said expander member in response to advancement of said expander pin portion longitudinally of said sleeve due to rotation of said expander screw.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1949922 | 1969-10-03 | ||
DE1965350 | 1969-12-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3678925A true US3678925A (en) | 1972-07-25 |
Family
ID=25757969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US77267A Expired - Lifetime US3678925A (en) | 1969-10-03 | 1970-10-01 | Connector for fractured bones |
Country Status (6)
Country | Link |
---|---|
US (1) | US3678925A (en) |
BE (1) | BE756717A (en) |
CH (1) | CH532929A (en) |
FR (1) | FR2064915A5 (en) |
GB (1) | GB1315220A (en) |
SE (1) | SE378063B (en) |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3760802A (en) * | 1971-02-26 | 1973-09-25 | Fischer Artur | Supporting device for fractured tubular bones |
US3782374A (en) * | 1971-08-17 | 1974-01-01 | Fischer Artur | Surgical device |
US3805775A (en) * | 1970-09-18 | 1974-04-23 | Fischer Artur | Expanding bone connector |
US3990438A (en) * | 1975-04-21 | 1976-11-09 | Pritchard Rowland W | Bone fracture fixation and compression apparatus |
US4091806A (en) * | 1976-01-13 | 1978-05-30 | Jacob Aginsky | Intramedullary compression nail for the treatment of bone fractures |
US4236512A (en) * | 1978-02-12 | 1980-12-02 | Jacob Aginsky | Connector for fractured bones |
US4590930A (en) * | 1983-06-22 | 1986-05-27 | Lloyd A. Kurth | Fixation device and process for an intramedullary nail |
US4776330A (en) * | 1986-06-23 | 1988-10-11 | Pfizer Hospital Products Group, Inc. | Modular femoral fixation system |
US4854312A (en) * | 1988-04-13 | 1989-08-08 | The University Of Toledo | Expanding intramedullary nail |
US4946461A (en) * | 1986-01-17 | 1990-08-07 | Fischer William B | Tool for removing the ball of the femur |
US5053035A (en) * | 1990-05-24 | 1991-10-01 | Mclaren Alexander C | Flexible intramedullary fixation rod |
US5716358A (en) * | 1994-12-02 | 1998-02-10 | Johnson & Johnson Professional, Inc. | Directional bone fixation device |
WO2003047443A1 (en) * | 2001-12-07 | 2003-06-12 | Sud Implant Chirurgie | Compressive bone anchoring device |
US20040015172A1 (en) * | 2000-11-10 | 2004-01-22 | Lutz Biedermann | Bone screw |
WO2004030549A1 (en) * | 2002-10-01 | 2004-04-15 | Synthes Ag Chur | Device for fixing bones |
US20040193156A1 (en) * | 2003-03-25 | 2004-09-30 | Marc Waisman | Hybrid interlocking proximal femoral fracture fixation |
US20050107790A1 (en) * | 2001-12-29 | 2005-05-19 | Benwen Qian | Intramedullary pin |
US20050197660A1 (en) * | 2004-03-08 | 2005-09-08 | Haid Regis W.Jr. | Occipital and cervical stabilization systems and methods |
US20060064094A1 (en) * | 1998-10-26 | 2006-03-23 | Expanding Orthopedics, Inc. | Expandable orthopedic device |
US20080281364A1 (en) * | 2007-05-08 | 2008-11-13 | Spineworks Medical, Inc. | Systems, devices and methods for stabilizing bone |
US20080294204A1 (en) * | 2007-03-07 | 2008-11-27 | Spineworks Medical, Inc. | Systems, methods, and devices for soft tissue attachment to bone |
US20090005782A1 (en) * | 2007-03-02 | 2009-01-01 | Chirico Paul E | Fracture Fixation System and Method |
US20090012564A1 (en) * | 2007-03-07 | 2009-01-08 | Spineworks Medical, Inc. | Transdiscal interbody fusion device and method |
US20090216260A1 (en) * | 2008-02-20 | 2009-08-27 | Souza Alison M | Interlocking handle |
US20090234398A1 (en) * | 2005-08-31 | 2009-09-17 | Chirico Paul E | Implantable devices and methods for treating micro-architecture deterioration of bone tissue |
US20090276048A1 (en) * | 2007-05-08 | 2009-11-05 | Chirico Paul E | Devices and method for bilateral support of a compression-fractured vertebral body |
US20100069913A1 (en) * | 2005-08-31 | 2010-03-18 | Chirico Paul E | Threaded bone filling material plunger |
WO2010042293A1 (en) * | 2008-10-07 | 2010-04-15 | Synthes Usa, Llc | Expandable bone support |
US20100168748A1 (en) * | 2008-07-16 | 2010-07-01 | Knopp Peter G | Morselizer |
US20100217335A1 (en) * | 2008-12-31 | 2010-08-26 | Chirico Paul E | Self-expanding bone stabilization devices |
US7828802B2 (en) | 2004-01-16 | 2010-11-09 | Expanding Orthopedics, Inc. | Bone fracture treatment devices and methods of their use |
CN101933831A (en) * | 2009-07-02 | 2011-01-05 | 王天兵 | Protective cap for tail end of medical steel needle |
US20110028974A1 (en) * | 2008-02-27 | 2011-02-03 | Antonio Chemello | Device for reducing a bone fracture |
US20110066152A1 (en) * | 2009-09-14 | 2011-03-17 | Zimmer, Gmbh | Angular lag implant for intramedullary nails |
US20130158552A1 (en) * | 2011-06-20 | 2013-06-20 | Tom Overes | Clavicle Nail with Lateral Expanding and Actuated Portion |
US8663224B2 (en) | 2010-09-09 | 2014-03-04 | DePuy Synthes Products, LLC | Surgical nail |
US20150012051A1 (en) * | 2013-07-03 | 2015-01-08 | Interventional Spine, Inc. | Method and apparatus for sacroiliac joint fixation |
US9138219B2 (en) | 2010-12-29 | 2015-09-22 | Tarsus Medical Inc. | Methods and devices for treating a syndesmosis injury |
US20190201061A1 (en) * | 2017-12-28 | 2019-07-04 | Industrial Technology Research Institute | Expandable orthopedic implant |
US10478238B2 (en) | 2014-12-02 | 2019-11-19 | Activortho, Inc. | Active compression devices, methods of assembly and methods of use |
US10512495B2 (en) | 2017-12-28 | 2019-12-24 | Industrial Technology Research Institute | Method for fabricating medical device and applications thereof |
US20200323571A1 (en) * | 2019-04-12 | 2020-10-15 | Stryker European Operations Limited | Locking System For Femoral Neck Fracture Fixation |
US11224467B2 (en) | 2016-02-26 | 2022-01-18 | Activortho, Inc. | Active compression apparatus, methods of assembly and methods of use |
US11234746B2 (en) | 2016-02-26 | 2022-02-01 | Activortho, Inc. | Active compression apparatus, methods of assembly and methods of use |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0009327A1 (en) * | 1978-09-01 | 1980-04-02 | Herbert D. Huddleston | Hip nail and method for its use |
IT1174336B (en) * | 1978-09-12 | 1987-07-01 | Gentile Giulio | IMPROVEMENT IN ARTICULATED SYSTEMS FOR POSITIONING GRIPPING DEVICES ON BONE TISSUES FROM E STERN |
US4262665A (en) * | 1979-06-27 | 1981-04-21 | Roalstad W L | Intramedullary compression device |
DE8534358U1 (en) * | 1985-12-06 | 1986-01-23 | Howmedica GmbH Werk Schönkirchen, 2314 Schönkirchen | Bone nail for treating upper arm fractures |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2121193A (en) * | 1932-12-21 | 1938-06-21 | Hanicke Paul Gustav Erich | Fracture clamping apparatus |
US2243717A (en) * | 1938-09-20 | 1941-05-27 | Moreira Franciseo Elias Godoy | Surgical device |
US2381050A (en) * | 1943-12-04 | 1945-08-07 | Mervyn G Hardinge | Fracture reducing device |
US2490364A (en) * | 1948-02-27 | 1949-12-06 | Herman H Livingston | Bone pin |
US2699774A (en) * | 1952-05-12 | 1955-01-18 | Livingston Herman Harrison | Bone pin locking device |
-
0
- BE BE756717D patent/BE756717A/xx unknown
-
1970
- 1970-09-29 CH CH1437870A patent/CH532929A/en not_active IP Right Cessation
- 1970-10-01 US US77267A patent/US3678925A/en not_active Expired - Lifetime
- 1970-10-02 GB GB4696270A patent/GB1315220A/en not_active Expired
- 1970-10-02 FR FR7035642A patent/FR2064915A5/fr not_active Expired
- 1970-10-02 SE SE7013390A patent/SE378063B/xx unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2121193A (en) * | 1932-12-21 | 1938-06-21 | Hanicke Paul Gustav Erich | Fracture clamping apparatus |
US2243717A (en) * | 1938-09-20 | 1941-05-27 | Moreira Franciseo Elias Godoy | Surgical device |
US2381050A (en) * | 1943-12-04 | 1945-08-07 | Mervyn G Hardinge | Fracture reducing device |
US2490364A (en) * | 1948-02-27 | 1949-12-06 | Herman H Livingston | Bone pin |
US2699774A (en) * | 1952-05-12 | 1955-01-18 | Livingston Herman Harrison | Bone pin locking device |
Cited By (67)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3805775A (en) * | 1970-09-18 | 1974-04-23 | Fischer Artur | Expanding bone connector |
US3760802A (en) * | 1971-02-26 | 1973-09-25 | Fischer Artur | Supporting device for fractured tubular bones |
US3782374A (en) * | 1971-08-17 | 1974-01-01 | Fischer Artur | Surgical device |
US3990438A (en) * | 1975-04-21 | 1976-11-09 | Pritchard Rowland W | Bone fracture fixation and compression apparatus |
US4091806A (en) * | 1976-01-13 | 1978-05-30 | Jacob Aginsky | Intramedullary compression nail for the treatment of bone fractures |
US4236512A (en) * | 1978-02-12 | 1980-12-02 | Jacob Aginsky | Connector for fractured bones |
US4590930A (en) * | 1983-06-22 | 1986-05-27 | Lloyd A. Kurth | Fixation device and process for an intramedullary nail |
US4946461A (en) * | 1986-01-17 | 1990-08-07 | Fischer William B | Tool for removing the ball of the femur |
US4776330A (en) * | 1986-06-23 | 1988-10-11 | Pfizer Hospital Products Group, Inc. | Modular femoral fixation system |
AU654872B2 (en) * | 1986-06-23 | 1994-11-24 | Howmedica Osteonics Corp. | Modular femoral fixation system |
US4854312A (en) * | 1988-04-13 | 1989-08-08 | The University Of Toledo | Expanding intramedullary nail |
US5053035A (en) * | 1990-05-24 | 1991-10-01 | Mclaren Alexander C | Flexible intramedullary fixation rod |
US5716358A (en) * | 1994-12-02 | 1998-02-10 | Johnson & Johnson Professional, Inc. | Directional bone fixation device |
US5868747A (en) * | 1994-12-02 | 1999-02-09 | Johnson & Johnson Professional, Inc. | Directional bone fixation device |
US7670339B2 (en) | 1998-10-26 | 2010-03-02 | Expanding Orthopedics, Inc. | Expandable orthopedic device |
US20060084998A1 (en) * | 1998-10-26 | 2006-04-20 | Expanding Orthopedics, Inc. | Expandable orthopedic device |
US20060064094A1 (en) * | 1998-10-26 | 2006-03-23 | Expanding Orthopedics, Inc. | Expandable orthopedic device |
US7601152B2 (en) | 1998-10-26 | 2009-10-13 | Expanding Orthopedics, Inc. | Expandable orthopedic device |
US9468483B2 (en) | 2000-11-10 | 2016-10-18 | Biedermann Technologies Gmbh & Co. Kg | Bone screw |
US8137389B2 (en) * | 2000-11-10 | 2012-03-20 | Biedermann Motech Gmbh & Co. Kg | Bone screw |
US8968372B2 (en) | 2000-11-10 | 2015-03-03 | Biedermann Technologies Gmbh & Co. Kg | Bone screw |
US20040015172A1 (en) * | 2000-11-10 | 2004-01-22 | Lutz Biedermann | Bone screw |
FR2833152A1 (en) * | 2001-12-07 | 2003-06-13 | Sud Implant Chirurgie | COMPRESSIVE BONE ANCHORING DEVICE |
WO2003047443A1 (en) * | 2001-12-07 | 2003-06-12 | Sud Implant Chirurgie | Compressive bone anchoring device |
US20050107790A1 (en) * | 2001-12-29 | 2005-05-19 | Benwen Qian | Intramedullary pin |
WO2004030549A1 (en) * | 2002-10-01 | 2004-04-15 | Synthes Ag Chur | Device for fixing bones |
US20060155281A1 (en) * | 2002-10-01 | 2006-07-13 | Thomas Kaup | Device for fixing bones |
US7094236B2 (en) * | 2003-03-25 | 2006-08-22 | Marc Waisman | Hybrid interlocking proximal femoral fracture fixation |
US20040193156A1 (en) * | 2003-03-25 | 2004-09-30 | Marc Waisman | Hybrid interlocking proximal femoral fracture fixation |
US7828802B2 (en) | 2004-01-16 | 2010-11-09 | Expanding Orthopedics, Inc. | Bone fracture treatment devices and methods of their use |
US7799053B2 (en) * | 2004-03-08 | 2010-09-21 | Warsaw Orthopedic, Inc. | Occipital and cervical stabilization systems and methods |
US20050197660A1 (en) * | 2004-03-08 | 2005-09-08 | Haid Regis W.Jr. | Occipital and cervical stabilization systems and methods |
US20090234398A1 (en) * | 2005-08-31 | 2009-09-17 | Chirico Paul E | Implantable devices and methods for treating micro-architecture deterioration of bone tissue |
US20100069913A1 (en) * | 2005-08-31 | 2010-03-18 | Chirico Paul E | Threaded bone filling material plunger |
US8998923B2 (en) | 2005-08-31 | 2015-04-07 | Spinealign Medical, Inc. | Threaded bone filling material plunger |
US20090005782A1 (en) * | 2007-03-02 | 2009-01-01 | Chirico Paul E | Fracture Fixation System and Method |
US20080294204A1 (en) * | 2007-03-07 | 2008-11-27 | Spineworks Medical, Inc. | Systems, methods, and devices for soft tissue attachment to bone |
US20090012564A1 (en) * | 2007-03-07 | 2009-01-08 | Spineworks Medical, Inc. | Transdiscal interbody fusion device and method |
US20090276048A1 (en) * | 2007-05-08 | 2009-11-05 | Chirico Paul E | Devices and method for bilateral support of a compression-fractured vertebral body |
US20080281364A1 (en) * | 2007-05-08 | 2008-11-13 | Spineworks Medical, Inc. | Systems, devices and methods for stabilizing bone |
US20090216260A1 (en) * | 2008-02-20 | 2009-08-27 | Souza Alison M | Interlocking handle |
US20110028974A1 (en) * | 2008-02-27 | 2011-02-03 | Antonio Chemello | Device for reducing a bone fracture |
US20100168748A1 (en) * | 2008-07-16 | 2010-07-01 | Knopp Peter G | Morselizer |
US20110184472A1 (en) * | 2008-10-07 | 2011-07-28 | Alfred Niederberger | Expandable Bone Support |
WO2010042293A1 (en) * | 2008-10-07 | 2010-04-15 | Synthes Usa, Llc | Expandable bone support |
US20100217335A1 (en) * | 2008-12-31 | 2010-08-26 | Chirico Paul E | Self-expanding bone stabilization devices |
CN101933831A (en) * | 2009-07-02 | 2011-01-05 | 王天兵 | Protective cap for tail end of medical steel needle |
US20110066152A1 (en) * | 2009-09-14 | 2011-03-17 | Zimmer, Gmbh | Angular lag implant for intramedullary nails |
US8926611B2 (en) * | 2009-09-14 | 2015-01-06 | Zimmer Gmbh | Angular lag implant for intramedullary nails |
US8663224B2 (en) | 2010-09-09 | 2014-03-04 | DePuy Synthes Products, LLC | Surgical nail |
US9138219B2 (en) | 2010-12-29 | 2015-09-22 | Tarsus Medical Inc. | Methods and devices for treating a syndesmosis injury |
US20130158552A1 (en) * | 2011-06-20 | 2013-06-20 | Tom Overes | Clavicle Nail with Lateral Expanding and Actuated Portion |
US9033984B2 (en) * | 2011-06-20 | 2015-05-19 | DePuy Synthes Products, Inc. | Clavicle nail with lateral expanding and actuated portion |
US11006991B2 (en) | 2013-07-03 | 2021-05-18 | DePuy Synthes Products, Inc. | Method and apparatus for sacroiliac joint fixation |
US20170151005A1 (en) * | 2013-07-03 | 2017-06-01 | Interventional Spine, Inc. | Method and apparatus for sacroiliac joint fixation |
US10166056B2 (en) * | 2013-07-03 | 2019-01-01 | DePuy Synthes Products, Inc. | Method and apparatus for sacroiliac joint fixation |
US9522028B2 (en) * | 2013-07-03 | 2016-12-20 | Interventional Spine, Inc. | Method and apparatus for sacroiliac joint fixation |
US20150012051A1 (en) * | 2013-07-03 | 2015-01-08 | Interventional Spine, Inc. | Method and apparatus for sacroiliac joint fixation |
US10478238B2 (en) | 2014-12-02 | 2019-11-19 | Activortho, Inc. | Active compression devices, methods of assembly and methods of use |
US11278333B2 (en) | 2014-12-02 | 2022-03-22 | Activortho, Inc. | Active compression devices, methods of assembly and methods of use |
US11234746B2 (en) | 2016-02-26 | 2022-02-01 | Activortho, Inc. | Active compression apparatus, methods of assembly and methods of use |
US11890042B2 (en) | 2016-02-26 | 2024-02-06 | Activortho, Inc. | Active compression apparatus, methods of assembly and methods of use |
US11224467B2 (en) | 2016-02-26 | 2022-01-18 | Activortho, Inc. | Active compression apparatus, methods of assembly and methods of use |
US20190201061A1 (en) * | 2017-12-28 | 2019-07-04 | Industrial Technology Research Institute | Expandable orthopedic implant |
US10512495B2 (en) | 2017-12-28 | 2019-12-24 | Industrial Technology Research Institute | Method for fabricating medical device and applications thereof |
US20200323571A1 (en) * | 2019-04-12 | 2020-10-15 | Stryker European Operations Limited | Locking System For Femoral Neck Fracture Fixation |
US11918261B2 (en) * | 2019-04-12 | 2024-03-05 | Stryker European Operations Limited | Locking system for femoral neck fracture fixation |
Also Published As
Publication number | Publication date |
---|---|
CH532929A (en) | 1973-01-31 |
FR2064915A5 (en) | 1971-07-23 |
SE378063B (en) | 1975-08-18 |
GB1315220A (en) | 1973-05-02 |
BE756717A (en) | 1971-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3678925A (en) | Connector for fractured bones | |
US3716051A (en) | Expandible connector for fractured bones | |
US2381050A (en) | Fracture reducing device | |
US3779239A (en) | Connector for fractured bones | |
US11278328B2 (en) | Pedicle screw with tulip | |
US2270188A (en) | Surgical threaded nail and method of applying same | |
US3334624A (en) | Intramedullary nail | |
US3760802A (en) | Supporting device for fractured tubular bones | |
US6540770B1 (en) | Reversible fixation device for securing an implant in bone | |
US5360450A (en) | Prosthesis for the correction of flatfoot | |
US3805775A (en) | Expanding bone connector | |
US20210007781A1 (en) | Tapping devices, systems and methods for use in bone tissue | |
US5209753A (en) | Bone screw | |
US4262665A (en) | Intramedullary compression device | |
US5514138A (en) | Connector having a stop member | |
US20100211115A1 (en) | Compression screw assembly, an orthopedic fixation system including a compression screw assembly and method of use | |
US5454811A (en) | Cam lock orthopedic fixation screw and method | |
US11116557B2 (en) | Orthopedic locking screw | |
JP2007522846A (en) | Bone screw | |
JP2004223260A (en) | Implant for osteosynthesis | |
GB1377288A (en) | Connecting and support element for medullated bone fractures | |
US3875936A (en) | Trochantaric attachment assembly and method of using same | |
JPH06511178A (en) | Pin with tapered valley diameter | |
CS273647B2 (en) | Stabilizer for thigh-bone's collum and upper end fracture treatment | |
JP2005007170A (en) | Bone nail |