CN211325478U - Orthopaedic instrument - Google Patents

Abstract

The utility model provides an orthopedic instrument, which comprises a central rod and a main cylinder body; the central rod is provided with a head part and a tail part, and the tail part is provided with a first threaded part; the main cylinder body is provided with an inner cavity which is axially communicated, and the inner cavity is provided with an internal thread matched with the first thread part; the main cylinder body is sleeved on the tail part of the central rod through the inner cavity, the head part of the central rod extends out of the main cylinder body, and the orthopedic instrument is used for realizing bone grafting and bone taking operation through the relative motion of the central rod and the main cylinder body. The utility model discloses an orthopedics apparatus has adopted screw propulsion's mode control main cylinder body to remove, and the bone degree of depth is got in easily control to can use an apparatus to accomplish to get the bone and plant the bone operation, it is more convenient to make the operation.

Description

Orthopaedic instrument

Technical Field

The utility model relates to the field of medical equipment, concretely relates to orthopedic equipment for bone is got to cartilage and bone grafting.

Background

Cartilage, cartilage tissue, is a connective tissue that is mainly used for support, is present in joints of the human body, and is mainly used for lubrication and cushioning. Following cartilage damage, the lesion is often removed and bone tissue from other healthy sites is removed and implanted for filling therapy. At present, a common cartilage bone taking instrument in the market generally takes bones in a knocking and inserting mode, the depth of the bone taking is not easy to control, the operation is complex, and the process of taking the bones and implanting the bones cannot be realized by using the same instrument.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an orthopedics apparatus, the control of being convenient for is got the bone degree of depth to can use the same apparatus to realize getting the bone and the bone grafting process, the structure is also comparatively simple with the operation moreover.

In order to achieve the purpose, the orthopedic instrument comprises a central rod and a main cylinder body; the central rod is provided with a head part and a tail part, and the tail part is provided with a first threaded part; the main cylinder body is provided with an inner cavity which is axially communicated, and the inner cavity is provided with an internal thread matched with the first thread part; the main cylinder body is sleeved on the tail part of the central rod through the inner cavity, the head part of the central rod extends out of the main cylinder body, and the orthopedic instrument is used for realizing bone grafting and bone taking operation through the relative motion of the central rod and the main cylinder body.

Optionally, when the main cylinder moves to the head to the limit, the tail end of the central rod is flush with the tail end of the main cylinder or is exposed out of the main cylinder.

Optionally, when the main cylinder moves to the tail to the limit, the tail of the central rod retracts into the inner cavity of the main cylinder.

Optionally, the main cylinder body is provided with a rough surface or a wrench block for matching with a wrench.

Optionally, the main cylinder body is provided with a pulling block, a supporting platform and an elastic piece; the support platform is arranged on the main cylinder body and is positioned on one side of the spanner block; the elastic piece is compressed between the spanner block and the supporting platform; one end of the elastic piece abuts against the supporting platform, and the other end of the elastic piece abuts against the pulling block; and one end of the wrench block, which is far away from the supporting platform, is provided with a first unidirectional tooth, and the main cylinder body is provided with a second unidirectional tooth matched with the first unidirectional tooth.

Optionally, the elastic member includes one or more than 2 springs, and the trigger block is a hexagonal block.

Optionally, the orthopaedic instrument further comprises a handle disposed at the head of the central rod.

Optionally, the orthopedic instrument further comprises a screw cap disposed on the head of the central rod.

Optionally, the tail end of the main cylinder is provided with a cutting edge.

Optionally, the central rod is provided with scale marks along the axial direction.

The orthopedic instrument of the utility model is mainly used for cartilage bone taking and bone grafting operation. When taking bones, a doctor can hold the head of the center rod, press the orthopedic instrument on the position to be taken bones and keep the center rod still, and then rotate the main cylinder body to enable the main cylinder body to rotate, advance and move downwards along the first thread part of the center rod so as to take bones. When the bone grafting is carried out, a doctor can hold the head of the center rod, the orthopedic instrument is pressed on the position to be implanted with the bone and keeps the main cylinder body still, meanwhile, the center rod is rotated through the head, the center rod drives the main cylinder body to move upwards by utilizing the first thread part, and therefore the center rod is utilized to push the bone existing in the main cylinder body to the position to be implanted with the bone. It can be seen that the utility model discloses an orthopedic instrument adopts the relative well core rod motion of screw thread propulsive mode control main barrel, does so, and the bone degree of depth is got in the easy control, and replaces to strike through screw thread propulsive mode, can reduce the operation risk. Moreover, the central rod and the main cylinder body can be oppositely and threadedly pushed, so that the bone taking and bone grafting operation can be realized by using the same orthopedic instrument, and the orthopedic operation is more convenient and faster.

Drawings

Fig. 1 is a schematic structural view of an orthopedic instrument according to an embodiment of the present invention;

FIG. 2 is a schematic axial cross-sectional structural view of the orthopedic instrument of the embodiment of FIG. 1;

FIG. 3 is a schematic structural view of a center rod of the orthopaedic instrument of the embodiment of FIG. 1;

FIG. 4 is a schematic view illustrating an assembled relationship of a saddle, an elastic member and a spanner block of the orthopedic instrument of the embodiment shown in FIG. 1;

fig. 5 is a schematic view of the internal structure of a saddle, an elastic member and a trigger block of the orthopedic instrument of the embodiment shown in fig. 1.

Description of reference numerals:

10: an orthopaedic instrument; 1: a center pole; 2: a handle; 3: pulling a block; 4: an elastic member; 5: a saddle; 6: a main cylinder;

1-1: screwing the cap; 1-2: scale lines; 1-3: a first threaded portion; 1-4: and a second threaded portion.

Detailed Description

In order to make the contents of the present invention more clearly understood, the present invention will be further described with reference to the drawings and the following embodiments. It is to be understood that the invention is not limited to the particular embodiments described below, and that general alternatives known to those skilled in the art are intended to be included within the scope of the invention. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

It should be understood that in the following description, references to "upper" and "lower" components may be made based on the accompanying drawings. Spatial terms such as "below …", "below …", "below", "above", and the like are intended to readily describe the positional relationship of one element to another element as illustrated in the figures, and may encompass a variety of different orientations of the instrument in use or operation in addition to the orientation depicted in the figures. The instrument may be otherwise oriented, such as by rotation through 90 degrees or at other orientations, and the spatial relationship descriptions used herein are intended to be correspondingly construed.

The core idea of the utility model is to provide an orthopedic instrument for realizing the operation of cartilage bone taking and bone grafting. The orthopedic instrument comprises a central rod and a main cylinder body. The center rod is provided with a head part and a tail part, and the tail part is provided with a first threaded part. The main cylinder body is provided with an inner cavity which is axially communicated, and the inner cavity is provided with an internal thread matched with the first thread part. The main cylinder body is sleeved on the tail part of the central rod through the inner cavity, and the head part of the central rod extends out of the main cylinder body, so that bone grafting and bone taking operations are realized through the relative motion of the central rod and the main cylinder body. For example, bone that may be present at the trailing end of the main cylinder may be pushed out by insertion of the trailing end of the center rod into the lumen. The orthopedic instrument of the utility model can push the main cylinder body to take bones by adopting a screw thread pushing mode, and the bone taking depth is easy to control; meanwhile, the center rod can be rotated to take and discharge bones, and the purposes of taking and implanting the bones by using the same instrument can be realized.

The orthopaedic instrument according to the present invention will be described in detail below with reference to the accompanying fig. 1-5.

Fig. 1 shows a schematic structural view of an orthopaedic instrument according to an embodiment of the invention, fig. 2 shows a schematic structural view in axial cross-section of the orthopaedic instrument according to the embodiment of fig. 1, and fig. 3 is a schematic structural view of a center rod of the orthopaedic instrument according to the embodiment of fig. 1.

As shown in fig. 1-3, an orthopedic device 10 according to an embodiment of the present invention includes a central rod 1 and a main cylinder 6. The center rod 1 has opposite tail and head portions, the tail portion being the end near the bone removal or implantation site and the head portion being the end remote from the bone removal or implantation site. Wherein, the tail of the central rod 1 is provided with a first thread part 1-3 (namely an external thread). And the main cylinder 6 has an axially through cavity provided with an internal thread for cooperation with the first threaded portion 1-3. In actual use, the main cylinder body 6 is sleeved on the tail part of the central rod 1 through the inner cavity of the main cylinder body, and the head part of the central rod 1 extends out of the main cylinder body 6, so that a doctor can operate the orthopedic instrument 10 through the head part of the central rod. In this embodiment, the length of the center rod 1 may be shorter than the main cylinder 6, may also be longer than the main cylinder 6, and may also be as long as the main cylinder 6.

When actually taking bones, a doctor can hold the head of the central rod 1, firstly press the orthopedic instrument 10 on the position to be taken bones, keep the central rod 1 still, and then rotate the main cylinder body 6 to ensure that the main cylinder body 6 rotates along the first thread part 1-3 to be pushed downwards to take bones. When the bone is implanted, a doctor can hold the head of the central rod 1 to press the orthopedic instrument 10 to the position to be implanted with the bone, keep the main cylinder body 6 still, rotate the central rod 1 to enable the central rod 1 to drive the main cylinder body 6 to move upwards through the first thread part 1-3, and accordingly the tail part of the central rod 1 is used for pushing bones in the main cylinder body 6 to the position to be implanted with the bone. Because the main cylinder body 6 is pushed to take bones in a screw thread pushing mode, the bone taking depth is easy to control, and the traditional knocking is replaced by the screw thread pushing mode, so that the surgical risk can be reduced. Meanwhile, the center rod can be rotated to discharge the taken bones for bone grafting, so that the bone taking and bone grafting operation can be completed by using the same orthopedic instrument, and the use is more convenient.

Further, in the bone removal and implantation processes, when the main cylinder 6 moves up to the limit position, the tail end (tail end) of the center rod 1 may be still located inside the main cylinder 6, or may be flush with the main cylinder 6 or may pass through the main cylinder 6. Preferably, the central rod is flush with the main cylinder body 6 or penetrates out of the main cylinder body 6, so that the central rod 1 can be tightly pressed at a position to be subjected to bone extraction during bone extraction, and the integral body is ensured not to displace; the bone can be exposed more easily when the bone is implanted. Further, the tail of the central rod 1 extends out of the main cylinder 6 by a length in the range of 1mm to 3mm, for example 1.5mm or 2mm, when the main cylinder is moved up to the extreme position. When the main cylinder moves downwards to the limit position, the tail end of the central rod 1 retracts into the inner cavity of the main cylinder 6, so that a space for accommodating bones can be formed, and the main cylinder can be tightly pressed at the position of bones to be implanted to prevent the main cylinder from rotating. The length of the tail end of the central rod 1 retracted into the inner cavity of the main cylinder 6 is determined according to the length of the bone to be removed, and is not particularly limited herein.

Referring back to fig. 1 and 2, the orthopaedic instrument 10 preferably further comprises a handle 2, arranged at the head of the central rod 1. The handle 2 can be connected with the head of the central rod 1 by welding, screw connection or snap connection. In this embodiment, as shown in fig. 3, the head of the central rod 1 is provided with a second threaded portion 1-4, the handle 2 is sleeved on the head of the central rod 1 and is in threaded connection with the second threaded portion 1-4, and optionally, the handle 2 and the central rod 1 form a cross structure. The handle 2 may be provided with anti-slip structures to increase friction, such as rough surfaces or protrusions, grooves, etc. When taking a bone or implanting a bone, a doctor can hold the handle 2 and tightly press the orthopedic instrument 10 at the position of the bone to be taken or implanted, so that the doctor can hold the orthopedic instrument more conveniently, and the operability of the orthopedic instrument is improved.

With continued reference to fig. 3, the orthopaedic device 10 preferably further comprises a screw cap 1-1 provided at the head of the central rod 1. The shape of the screw cap 1-1 can be hemispherical, semi-ellipsoidal or other regular or irregular shape. The turncap 1-1 may be integrally formed with the center rod 1, or may be connected to the head of the center rod 1 by welding, screwing, or snap-fitting. Further, the screw cap 1-1 may be provided with an anti-slip structure, such as a rough surface or a structure of a bump, a groove, etc. When the bone grafting is carried out, a doctor can hold the screw cap 1-1 and rotate the central rod 1, the central rod 1 can move the main cylinder body 6 upwards by utilizing the first thread part 1-3, and meanwhile, the tail part of the central rod 1 pushes the bone existing in the main cylinder body 6 to the bone grafting position. The operability of the orthopedic instrument can be improved by arranging the screw cap 1-1. Optionally, the head of the central rod 1 can be provided with a handle 2 and a screw cap 1-1 at the same time.

Further, the orthopaedic device 10 preferably further comprises a limiting structure for limiting the maximum distance of upward movement of the main cylinder 6. Preferably, the limiting structure comprises a handle 2. Specifically, when the bone is implanted, the central rod 1 is rotated, the central rod 1 drives the main cylinder 6 to move upwards to a certain distance by using the first thread part 1-3, the main cylinder 6 is blocked by the handle 2, and the movement upwards is stopped, namely, the handle 2 can be used for limiting the main cylinder 6 besides being used for holding.

Referring back to fig. 3, the center rod 1 may further be provided with a plurality of scale marks 1-2 for marking the depth of the rotary propulsion of the main cylinder 6. Before taking out or implanting bone, the scale lines 1-2 may be arranged to be partially or entirely covered by the main cylinder 6, but when the main cylinder 6 is rotationally advanced, the rotational advance depth of the main cylinder 6 will be marked as the main cylinder 6 is gradually exposed as it is advanced.

With continued reference to fig. 1 and 2, the preferred orthopedic instrument 10 further includes a trigger block 3 disposed on the main cylinder 6. The wrench block 3 is used for being matched with an external wrench, and the wrench block 3 is screwed by the wrench to drive the main cylinder body 6 to rotate. The wrench block 3 can be fixedly arranged or arranged in a transmission way with the main cylinder body 6. Optionally, the wrench block 3 is a hexagonal block or a twelve-square block, and can be used with an inner hexagonal wrench and an inner twelve-angle wrench respectively.

Further, as shown in fig. 4 and combined with fig. 1 and 2, the orthopedic instrument 10 further includes an elastic member 4 and a saddle 5, both disposed on the main cylinder 6, and the saddle 5 is fixed on the main cylinder 6 and located at one side of the wrench block 3, and the elastic member 4 is compressed and disposed between the wrench block 3 and the saddle 5, and one end of the elastic member 4 abuts against the saddle 5, and the other end abuts against the wrench block 3. Wherein, the one end of pulling piece 3 and keeping away from saddle 5 is provided with first one-way tooth, and main barrel 6 is provided with the one-way tooth of second with first one-way tooth matched with. Through the cooperation of first one-way tooth and second one-way tooth, realize pulling block 3 and main cylinder 6's transmission and be connected. It should be noted that "abutting" herein may be unconnected or connected. In addition, the one-way direction means that the wrench block 3 can only drive the main cylinder 6 to rotate in one direction, but cannot drive the main cylinder 6 to rotate in the opposite direction.

In more detail, when the wrench block 3 is screwed, the first one-way teeth on the wrench block 3 are matched with the second one-way teeth on the main cylinder body 6 to drive the main cylinder body 6 to rotationally advance along the first thread part 1-3 of the central rod 1, so as to take bones. Only when the first one-way tooth rotates in the positive direction, the main cylinder body 6 is driven to be screwed and pushed, and when the first one-way tooth rotates in the negative direction, no interference is formed between the first one-way tooth and the second one-way tooth, so that the main cylinder body 6 is not driven to rotate in the negative direction. Here, the forward direction corresponds to a direction in which the main cylinder is rotated to move down, and the reverse direction corresponds to a direction in which the main cylinder is rotated to move up. Therefore, when the wrench is used, the wrench does not need to be taken down after being rotated for position adjustment, and the wrench only needs to drive the wrench block 3 to rotate reversely to a proper position and then continue to rotate forwardly. In the process, no matter the first unidirectional tooth and the second unidirectional tooth rotate in the forward direction, the forward direction and the reverse direction, the reverse direction or the reverse direction and the forward direction, the first unidirectional tooth and the second unidirectional tooth can always keep the abutting state under the tension action of the elastic piece 4 and can not be separated.

Fig. 4 is a schematic view illustrating an assembled relationship of the pallet 5, the elastic member 4 and the trigger block 3 of the embodiment shown in fig. 1, and fig. 5 is a schematic view illustrating an internal structure of the pallet 5, the elastic member 4 and the trigger block 3 of the embodiment shown in fig. 1. In this embodiment, the main cylinder 6 has opposite head and tail ends, the head being the end away from the patient and the tail end being the end close to the patient. As shown in fig. 4 and 5, in one embodiment, the head end of the main cylinder 6 is formed with a second one-way tooth protruding downward, and the end of the wrench block 3 away from the pallet 5 is formed with a first one-way tooth protruding upward. Wherein, saddle 5 sets up in the below of pulling piece 3, and under the spring action of elastic component 4, the one-way tooth of the first one-way tooth on pulling piece 3 and the one-way tooth butt of second of main cylinder body 6 to under the exogenic action that does not have vertical (being axial), elastic component 4 can keep the one-way tooth of first one-way tooth and second all the time and be in the butt state.

The resilient member 4 may comprise one or more springs. Taking a spring as an example, the spring can be sleeved on the main cylinder body 6, the support table 5 and the pull block 3 can be provided with grooves, and two ends of the spring are respectively arranged in the two grooves, so that the spring can be effectively prevented from falling off. The saddle 5 may be a table surface carved on the main cylinder 6, or a projection integrally formed with the main cylinder 6, or detachably disposed on the main cylinder 6.

In another embodiment, the positional relationship between the pallet 5 and the wrench block 3 may also be inverted, that is, the pallet 5 is located at the head of the wrench block 3 closer to the center rod 1 (e.g., the pallet 5 is located above the wrench block 3), and correspondingly, one end of the wrench block 3 away from the pallet 5 protrudes downward to form a first one-way tooth, and the main cylinder 6 forms a second one-way tooth protruding upward.

In another embodiment, the main cylinder 6 is not provided with the saddle 5, the elastic piece 4, the wrench block 3, the first one-way tooth and the second one-way tooth, and only has an annular rough surface for clamping and screwing by a wrench. The orthopedic instrument is slightly inconvenient in operation, but simple in structure, easy to manufacture and low in cost.

Further, it is preferable that the rear end of the main cylinder 6 is provided with a cutting edge to increase the bone-cutting effect when the main cylinder 6 is rotationally advanced. Optionally, the cutting edge is serrated to obtain a better bone drilling effect.

The working principle of an orthopaedic device according to the present embodiment will be explained below with reference to the preferred embodiment shown in fig. 1-5.

When a bone is taken, one hand can press the central rod 1 through the rotating cap 1-1 and the handle 2 at the head of the central rod 1, so that the vertical axis position of the main cylinder body 6 is fixed, the central rod 1 is prevented from moving in operation, the other hand can rotate the wrench block 3 with a wrench, the wrench block 3 drives the main cylinder body 6 to rotate through the matching of the first one-way teeth and the second one-way teeth, the main cylinder body 6 rotates and moves downwards along the first thread part 1-3 of the central rod 1, and further the bone is taken by drilling. The central rod 1 is provided with scale lines 1-2, and the bone taking depth can be observed along with the exposure of the main cylinder body 6 when the main cylinder body moves downwards. Because the spanner block 3 and the main cylinder 6 are matched by adopting a one-way tooth structure, and the tail part of the spanner block 3 is provided with the elastic part 4 and the supporting platform 5, the spanner is not required to be adjusted after being rotated every time when being used, and the one-way rotation drilling and bone taking of the main cylinder 6 can be realized.

When the bone is implanted, the orthopedic instrument 10 is pressed by hands through the screwing cap 1-1 and the handle 2 at the head of the central rod 1, so that the main cylinder body 6 is propped against the surface of the position to be implanted with the bone and can not rotate, meanwhile, the screwing cap 1-1 at the head of the central rod 1 is rotated, at the moment, the central rod 1 can move up the main cylinder body 6 by utilizing the first thread part 1-3, and the taken normal bone is implanted into the position to be implanted with the bone by utilizing the tail part of the central rod 1.

It should be understood that the preferred embodiments of the present invention are described above, but not limited to the scope disclosed in the above embodiments, for example, the present invention is not limited to the shape of the handle, and in addition, a part or the whole length of the center rod may be provided with an external thread (i.e., the first thread portion), and correspondingly, a part or the whole length of the inner cavity of the main cylinder may be provided with an internal thread, and in addition, the pallet may be integrally formed or separately formed with the main cylinder.

In conclusion, adopt the utility model discloses an orthopedics apparatus, well core rod 1 and main barrel 6 are connected through first screw thread portion 1-3, and rotatable propulsion main barrel 6 drills and gets the bone, easily controls and gets the bone degree of depth. Simultaneously, rotatable well core rod 1 discharges the inside bone that has of main barrel 6, and available apparatus satisfies the demand of getting the bone and planting the bone simultaneously, and it is convenient to use.

The above description is only for the description of some embodiments of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all included in the protection scope of the claims.

Claims (10)

1. An orthopedic device, comprising a central rod and a main cylinder; the central rod is provided with a head part and a tail part, and the tail part is provided with a first threaded part; the main cylinder body is provided with an inner cavity which is axially communicated, and the inner cavity is provided with an internal thread matched with the first thread part; the main cylinder body is sleeved on the tail part of the central rod through the inner cavity, the head part of the central rod extends out of the main cylinder body, and the orthopedic instrument is used for realizing bone grafting and bone taking operation through the relative motion of the central rod and the main cylinder body.

2. The orthopedic instrument of claim 1, wherein the trailing end of the center rod is flush with or exposed from the end of the main cylinder when the main cylinder is moved to the head to the limit.

3. The orthopedic instrument of claim 1, wherein when said main cylinder moves to a limit toward said tail, said tail of said central rod retracts into said inner cavity of said main cylinder.

4. The orthopedic instrument of claim 1, wherein said main cylinder has a rough surface or a wrench block for engaging a wrench.

5. The orthopedic instrument of claim 4, wherein said main cylinder is provided with a spanner block, a saddle and an elastic member; the support platform is arranged on the main cylinder body and is positioned on one side of the spanner block; the elastic piece is compressed between the spanner block and the supporting platform; one end of the elastic piece abuts against the supporting platform, and the other end of the elastic piece abuts against the pulling block; and one end of the wrench block, which is far away from the supporting platform, is provided with a first unidirectional tooth, and the main cylinder body is provided with a second unidirectional tooth matched with the first unidirectional tooth.

6. The orthopedic instrument of claim 5, wherein said elastic member comprises one or more than 2 springs and said trigger block is a hexagonal block.

7. The orthopedic instrument of claim 1, further comprising a handle disposed on the head of the central rod.

8. The orthopedic instrument of claim 1, further comprising a cap screw disposed on the head of the central rod.

9. The orthopedic instrument of claim 1, wherein the trailing end of the main cylinder is provided with a cutting edge.

10. The orthopedic instrument of claim 1, wherein said central rod is provided with graduations along an axial direction.

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