CN101022767B - Bone plate system with bone screws fixed by secondary compression - Google Patents
Bone plate system with bone screws fixed by secondary compression Download PDFInfo
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- CN101022767B CN101022767B CN2005800299949A CN200580029994A CN101022767B CN 101022767 B CN101022767 B CN 101022767B CN 2005800299949 A CN2005800299949 A CN 2005800299949A CN 200580029994 A CN200580029994 A CN 200580029994A CN 101022767 B CN101022767 B CN 101022767B
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- 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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
- A61B17/8047—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers wherein the additional element surrounds the screw head in the plate hole
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Abstract
A bone plating system includes a plate, fixed angle and variable angle bone screws, and corresponding set screws for each type of the bone screws. The plate includes common openings adapted to receive the variable and fixed angle bone screws, both of which can be locked relative to the plate with the set screws. In all modes of use, a set screw, sometimes in combination with a sliding element, is then used to fix the level of compression and prevent loosening. In one mode of use, a bone screw can also be driven to cause displacement of the plate such that pressure is applied to maintain bone parts together about a fracture in tight engagement.
Description
Invention field
The present invention relates to orthopedic device widely.Relate in particular to bone screw is locked with respect to hone lamella.
Background technology
For the miscellaneous fracture of health, with plate fixedly be appropriate infirmary need carry out stable well-known technology.With plate fixedly the time, on the outer surface of the bone that strides across fracture, settle the plate of an inflexible normally metal, and screw stretches out by this plate and is fixed in the bone, is fixed on the both sides of fracture in the mode of this bone of supporting during the medical treatment to allow this rigid plate.
These screws comprise along one and are suitable for meshing transcortical bone.The most generally, the head of screw is the head of screw of a standard, and when this holder was screwed in the bone, the head of screw of this standard provided a thrust around the corresponding circular screw hole of this plate, and this plate is compressed facing to bone.
Authorize the U.S. Patent No. Re.28 of Allgower, 841 describe a kind of plate that uses with the common standard screw that has with the head of a convex lower surface.This plate comprises microscler screw hole, and each screw hole at one end forms a upslope part and the less substantially radius of curvature around this ramp portion.In use, in bone, bore a hole, and in the hole that this gets out, insert a screw and rotate this screw, contact this slope up to head of screw by the screw hole that is close to this slope.When such engagement, this hone lamella makes this plate exert pressure around this fracture and keeps together with the mode of the tight engagement each several part with this fractured bones having displacement along the direction that makes this ramp portion move away this screw.
Recently, special at the metaphysis place of long bone (though being not limited thereto), utilize the threaded screw of screwed head that desirable result has been arranged, these threaded heads can be threadably engaged in the screw thread in this plate and with screw with respect to this plate locking, and limit this plate compressing thus with respect to this bone.But these systems do not provide the required control that compresses between this plate and the bone.As long as the screw thread of screw head is with respect to this plate one locking, the control of thrust has just been disappeared.Therefore, a kind of like this system provides the stability of suboptimum.
Some plate that the Synthes company in Pennsylvania, America Paoli city sells has been designed to one and has been called COMBI-HOLE
TMThe hole.This COMBI-HOLE
TMBe a microscler screw hole, comprise two circular section that combine, each section extends through about 250 degree.A circular section has screw thread, thereby is suitable for pack into the screw of a screwed head of fixed angle.When used as such, this system lacks equally to the above-mentioned control that compresses.Another circular section does not have screw thread, thereby the threadless head of the standard that is suitable for packing into and form compressing with respect to this plate.In this section, a screw can be angled slightly with respect to this hole.But the angle of this screw can not be fixed.
Authorize a kind of system of U.S. Patent No. 5,549,612 explanations of people such as Yapp, wherein the angle of screw can utilize the rotating cam of a contact screw head to fix.But,,, limited possible fixing thus so this cam can not provide any downward force facing to screw head because this cam for good and all is installed in the hole of this plate and must makes the shape that allows bone screw to come in and go out.Like this, if this cam only rotates a little amount from a locking angle, this cam just may not can be fixed.And the shape of this cam (as shown in Fig. 4 and 4A of this patent) illustrates that this cam applies the power that makes progress facing to screw, and this power is opposite unfriendly with the thrust of the screw that faces toward this plate.
Brief summary of the invention
Therefore, an object of the present invention is to provide the system of a kind of plate and screw, thus can be by the crush between complete panel of surgeon and the bone.
Another object of the present invention provides the system of a kind of plate and screw, and wherein each hole can be used with a screw in the mode of a kind of fixed angle or variable-angle.
Another purpose of the present invention provides the system of a kind of plate and screw, and wherein when inserting a screw in a kind of mode of variable-angle, this screw then is locked with a desired angle.
Another purpose of the present invention provides the system of a kind of plate and screw, and this system is suitable for making a plate to produce displacement along a direction, the displacement of this direction exert pressure and with the each several part of bone around a fracture tight engagement keep together.
A further object of the present invention provides a kind of plate and screw system that can carry out traditional screw-plate fixation.According to these purposes (they will go through below), a kind of hone lamella fixed system comprises the bone screw of a plate, variable-angle and fixed angle and to the corresponding adjustment screw of every kind of bone screw.According to the present invention, this plate comprises and is applicable to the variable-angle of packing into and bone screw fixed angle that these two kinds of screws can be locked with respect to this plate.More particularly, this plate comprises a hole system that is used for bone screw and adjusts screw.Threadless bone screw of this hole system specialization and an adjacent adjustment screw hole.Though the upper end of this bone screw and adjustment screw hole forms a common hole in the upper head plate of plate, the bottom plate separately in two holes forms visibly different hole in plate.This bone screw comprises bigger last cylindrical shape part, a central ball part and a less following cylindrical shape part.In one embodiment, comprise a upslope part and a lower part that is used for the thrust transmission is striden across a fracture near the bone screw of adjusting screw hole with less radius of curvature.In this same embodiment, this adjustment screw hole comprises a upper conical part, a center circle tubular part, a platform and a following threaded portion.When settling this screw, the head of adjusting screw is stressed and this bone screw is locked in the position facing to the head of this bone screw.
These bone screw preferably include variable-angle and two kinds of screws fixed angle.The screw of each variable-angle has a head with a sphere curved surface.An adjustment screw that therewith uses comprises the head of a spherical concave surface, and the radius of the head of this concave surface and the head of bone screw are complementary.In use, to be murices nail bit one hole, then this bone screw is driven in this bone by the desired angle of the bone screw of this plate.In case between this plate and bone, produce desired crush, so just can be and the position that fixes this bone screw with respect to this plate by adjusting that screw inserts in the adjustment screw hole.Drive to adjust screw, between the sphere recess of the opposed walls of the sphere recess of adjusting screw and bone screw, produce (downwards and radially two kinds) enough thrusts, thereby lock the head of bone screw with respect to this plate betwixt.Therefore, when bone screw with respect to this plate when adjusting screw and maintain, the bone screw of this variable-angle can be used for compressing this plate facing to bone, can be locked and can not become flexible later on this variable angle then.
The bone screw of each fixed angle has a band head and a central ball part of mating with the radius and the size of bone screw of cylindrical shape part up and down.In addition, the top edge of this head is provided with conical taper.The adjustment screw that uses with the bone screw of fixed angle comprises a following cylindrical shape part and a last conical lip.In use, bone screw hole drill one hole by this plate enters bone with making round centres that this hole limits with the branch of cylindrical part up and down by bone screw basically.The bone screw that drives a fixed angle then enters bone and compresses this plate on demand facing to this bone.Then, for level that is fixed and clamped and any the becoming flexible that prevents that possibility from producing owing to small movements, to adjust screw and insert adjust screw hole, produce enough power (downwards and radially), retreat to prevent any of bone screw facing to bone screw head up to this tapered flanges.
According to another embodiment of the present invention, in the common hole of this plate, provide a lock washer.When adjusting screw and insert in this plate, adjust screw and make head that packing ring the faces toward bone screw application of force and bone screw is locked in this plate longitudinally.The packing ring sidepiece of the head of contact bone screw can be spherical concave surface, thereby the head of this kind shape is formed the contact of surface area maximum.In addition, the contact surface of packing ring and bone screw head can form the matte surface of high friction, to help with respect to this plate locking bone screw.
According to the another way of the screw that uses this plate and variable-angle, along towards this slope skew and an axis that leaves the round center that the cylindrical shape up and down by screw hole partly limits be that screw bores a hole.Drive bone screw and enter this hole, up to screw head contact ramp portion, this causes one of this plate displacement that head is placed in distance required in the spherical part of concave surface.This displacement exert pressure and with the each several part of bone around a fracture and tight engagement keep together.The packing ring that utilizes the adjustment screw then and provide there fixes the level that compresses and prevents to become flexible.
This plate and screw also can carry out traditional screw-plate fixation.Just, different holes is used in the frequent hope of surgeon in a different manner; Also promptly or be fixed angle or variable angle.During the reduction of the fracture, screw mode by hand is inserted into the both sides of fracture fast.Thereafter, utilize other hole on the plate, the doctor can the fixed screw of implant angle and the screw of optional other variable-angle.
The Technology professional can know other purpose of the present invention and advantage with reference to the detailed description of this patent in conjunction with the accompanying drawings.
The accompanying drawing summary
Fig. 1 is the side view according to the part section of a kind of hone lamella fixed system of the present invention, and figure is shown with the bone screw and the corresponding screw of adjusting of a variable-angle;
Fig. 2 is the side view according to the part section of a kind of hone lamella fixed system of the present invention, and figure is shown with the bone screw and the corresponding screw of adjusting of a fixed angle;
Fig. 3 is the top perspective view according to the section of the disconnection of a plate of the present invention, illustrates a single hole system;
Fig. 4 is the bottom perspective view according to the section of the disconnection of a plate of the present invention, illustrates this single hole system;
Fig. 5 is the side view according to the part section of a kind of hone lamella fixed system of the present invention, and figure is shown with a bone screw that is used for the variable-angle of plate-displacement operation mode;
Fig. 6 is vertical section perspective view of a kind of second embodiment of hone lamella fixed system, illustrates a not configuration of locking;
Fig. 7 is the perspective view of a kind of second embodiment of hone lamella fixed system, illustrates the configuration that this is not locked;
Fig. 8 is vertical section perspective view of a kind of second embodiment of hone lamella fixed system, illustrates a kind of configuration of locking;
Fig. 9 is the perspective view of a kind of second embodiment of hone lamella fixed system, illustrates the configuration of this locking;
Figure 10 is vertical section perspective view of a kind of the 3rd embodiment of hone lamella fixed system, illustrates a kind of not configuration of locking;
Figure 11 is vertical section perspective view of a kind of the 3rd embodiment of hone lamella fixed system, illustrates a kind of configuration of locking;
Figure 12 is the perspective view of a kind of the 3rd embodiment of hone lamella fixed system, illustrates the configuration of this locking;
Figure 13 is vertical section perspective view of a kind of the 4th embodiment of hone lamella fixed system, illustrates a kind of configuration of locking;
Figure 14 is the top perspective view of a kind of the 4th embodiment of hone lamella fixed system, illustrates the configuration of this locking; And
Figure 15 is vertical section perspective view of a kind of the 5th embodiment of hone lamella fixed system, illustrates a kind of configuration of locking.
Preferred embodiment describes in detail
Turn to Fig. 1 and 2 now, comprise a plate 12 and one or two bone screw 14,114 and adjustment screw 16,116 according to bone plate system 10 of the present invention.Plate 12 can be to compress or any orthopedic plate that stabilize bones is used, include, but is not limited to be used for the key and/or metaphyseal fracture of long bone plate, be used for the plate of the displacement on mandibular bone or the skull other parts and be used for (particularly along vertebra) plate of osteosynthesis.
With reference to Fig. 3 and 4, plate 12 comprises a plurality of hole systems 18 that are used for bone screw and adjust screw.Depend on its purposes, this skeletal system can be arranged on the place, both sides of fracture.Or rather, each hole system 18 limits a threadless bone screw 20 and an adjacent threaded adjustment screw hole 22.Though the upper end of bone screw 20 and adjustment screw hole 22 forms a common hole 24 in the upper surface 26 of plate 12, the bottom in its hole separately preferably forms the hole 28,30 that has nothing in common with each other in the lower surface 32 of this plate.
With reference to Fig. 1 and 3, bone screw 20 comprises bigger last cylindrical shape part 34, central ball part 36 and less following cylindrical shape part 38. Cylindrical shape part 34 and 38 also can be a truncated cone shape.Adjusting upslope part 40 that near the screw hole 22 bone screw 20 comprises that as described below being used to transmit the thrust that strides across a fracture and bottom 42 with radius of curvature littler than cylindrical portions may 38.Adjust the bottom 50 that screw hole 22 comprises upper conical part 44, central cylindrical part 46, platform 48 and is provided with mechanical whorl.
These bone screw preferably include the screw 14 of variable-angle and fixed angle screw 114 both.With reference to Fig. 1, the screw 14 of each variable-angle one sphere curved surface is arranged and comprise groove 62 (for example spanner use hex slot) and preferably include one slotted from apex point end 66.The adjustment screw 16 that uses with the screw 14 of variable-angle comprises a head 70 and following cylindrical shape part 74, and this head 70 has a last sphere recess 72 that mates with the radius of curvature of head part 60.Adjust screw 16 and also comprise an axle 76 that has mechanical whorl, the size of this screw thread can mesh the screw thread 50 of adjusting screw hole.This adjustment screw comprises that also one is gone up groove 78, for example a hex slot that is used for driving rotationally this adjustment screw.According to an aspect of the present invention, last groove 62 and 78 preferably has same shape and size, makes each groove can use same tool drives.
In use, with the screw 14 of this variable-angle by plate 12 bone screw and enter the desired angle of bone and bore a hole.Then bone screw 14 is driven in bone 80 diaphyseal bone as shown by this hole.Or this bone screw does not have preboring ground to drive with wanted angle.In case the head 60 of screw 14 reaches plate 12, just drives screw 14, up between plate 12 and bone 80, producing desired crush.This requires the rotation of at least 180 degree usually, and usually is that the several of screw rotate completely.Bone screw 14 can be by adjusting screw 16 insertion adjustment screw holes 22 and fixing with respect to plate 12 then.Adjustment screw 16 was driven to before the sphere recess 36 of the opposed walls of the sphere recess 72 of adjusting screw 16 and bone screw 20 and produces enough thrusts, thereby locked the head 60 of bone screw 14 with respect to plate 12.Therefore, when bone screw 14 was adjusted screw 16 and maintains with respect to plate 12, the bone screw 16 of variable-angle can be used for desired angle can and can not locating afterwards with such angle locking then facing to bone 80 pressure strips 12 with loosening.
Refer again to Fig. 2, the bone screw 114 of each fixed angle is similar basically to the bone screw 14 of variable-angle, except the shape of head 160.Head 160 comprises cylindrical shape part 192,194 and central ball part 196 up and down, and the latter is mated the size and the radius of bone screw.In addition, the top edge of head 160 is provided with conical taper 198.Similar basically with the adjustment screw 116 that the bone screw 114 of fixed angle is used to adjustment screw 16, except the shape of its head 200.The head 200 of adjusting screw 116 comprises a following cylindrical shape part 202 and a last conical lip 204.
In use, one with the bone screw 114 of the substantially concentric position driving fixed angle of the circular central that limits by the part of cylindrical shape up and down 34,38 (Fig. 3) of bone screw 20 (preboring or do not have pilot hole of preboring).The head 160 of screw 114 is placed in the space that is limited by part 34,36,38, when towards bone drive head 160, compresses this plate facing to bone.Can drive bone screw 114, up to realizing desired compressing.Bone screw is by accepting 3 fixing fixed angles (also promptly perpendicular to this plate) that remain on.When adjusting screw 116 insertion screw holes 22, the cylindrical shape part 202 of the part of cylindrical shape up and down 34,38 of screw hole 20 and adjustment screw 116 provides fixed 3 points.In addition, for the level that is fixed and clamped with prevent by fine motion contingent any loosening, drive and adjust the enough power that screw 116 divides 198 places to produce the head 160 that faces toward bone screw 114 up to tapered flanges 204 at gradually narrowing portion, thereby prevent leaving backward of bone screw 114.Just, adjusting screw 116 is locked at bone screw 114 in the position.
Referring now to Fig. 5, according to the another way of the screw 14 that uses this plate and variable-angle, be that screw 14 bores a hole along a axis perpendicular to this plate, this hole is 40 skews and concentric with cylindrical shape part 42 substantially towards the slope; Also promptly leave the part of cylindrical shape up and down 34,38 centers of circle that limited by screw hole 20.Then bone screw 14 is driven in this hole,, and therefore makes plate 12 produce a displacement that equals head 60 is placed in distance required in the concave surface spherical part 36 along the direction of arrow up to the bottom 60a of the spherical head 60 of screw contact slope 40.This displacement applied pressure keeps together each bone parts with centering on fracture in tight engagement.Utilize to adjust as described above then that screw 16 fixes level of compression and with screw lock on plate 12, with anti-loosening.
Also can use this plate and screw in the fixing known mode of being familiar with of people to screw-plate.Just, the surgeon usually wishes to use by different way different holes, also promptly or with fixed angle, or the angle changing.As an example, during the reduction of the fracture, can screw be inserted on the both sides of fracture apace in the mode that angle can change conveniently.Thereafter, utilize other hole and careful aligning the on the plate, for example get out bullport with a drilling director, the surgeon can the fixed screw of implant angle.
Referring now to Fig. 6 and 7, the diagram second embodiment of the present invention.This system comprises a plate 312 that a hole system 318 is arranged, and hole system 318 comprises a threadless bone screw 320, a groove 350 and an adjustment screw 322 that is used to adjust screw 316 that is used for packing ring 352.As mentioned above, bone screw 320 comprises bigger last cylindrical shape part 334, central ball part 336 and less following cylindrical shape part 338.Bone screw such as above-mentioned screw 14 can be placed in the screw hole 320.Groove 350 comprises the rear slopes 354 of a cam-type.Packing ring 352 comprises that straddles the elongate slots 360 that cam face 356 on the cam-type slope 354, spheric basically spill contact surface 358 that points to bone screw 320 and are used to adjust the head 370 and the axle 372 of screw 316.Preferably diameter is uniform for adjustment screw hole 322 in the plate 312.The head 370 of adjusting screw is preferably columnar, and the axle 372 of adjustment screw 316 can screw-threaded engagement be adjusted screw hole 322.Packing ring 352 and adjust screw 316 and be preferably in and plate 312 be placed in (for example in factory or by an operating technology person) is installed in groove 350 and the adjustment screw hole 322 before in advance on the bone.
In use, bore a hole by bone screw 320 with pierce in the used bone of the screw 14 of variable-angle with desired angle.Then bone screw 14 is gone in the bone by this hole drill.Or preboring ground does not drive bone screw with desired angle.Perhaps, the screw 114 (Fig. 2) of a fixed angle can be inserted one be drilled to bone screw 320 concentric holes in.
In case the head 60 of screw 14 arrives plate 312, just drives screw 14, up between this plate and bone, producing desired crush.Can turn to and adjust to come in the screw hole 322 by adjusting screw 316 then, comprise its angle position, cause packing ring 352 to be forced to downwards and forward along cam-type rear slopes 354 with respect to the relation of plate 312 fixed bone screws 14 with respect to this plate.With reference to Fig. 8 and 9, this causes contact surface 358 to be driven and enter in the head 60 by the head 60 towards screw.Rotate to adjust screw 16, between sphere recess 336, produce enough thrusts, thereby the head 60 of bone screw 14 is locked at therebetween in the opposed walls of the contact surface 358 of packing ring and bone screw 320.Amount of spin is generally at least 180 degree, and this angle provides suitable stroke for the head 370 of adjusting screw and in the axle 372 of screw and the sufficient engagement between this plate.In addition, bone screw 320 can be eccentric slightly, and perhaps contact surface 358 can be aspheric slightly, thus when packing ring when bone screw is driven, 3 of the side face contact even more stable.Be appreciated that by driving packing rings 352, just can use remarkable bigger surface area and produce bigger with respect to utilizing the thrust of adjusting screw towards bone screw head 60.Secondly, by longitudinally driving packing ring, the outer surface of contact surface 358 and bone screw head 60 can have the high friction surface of a matte (following discussion), and when two surfaces must be rotated relative to one another, this surface was normally unpractical.Said system can similarly be used with the bone screw 114 (Fig. 2) of a fixed angle.
Notice that also the top edge 374 of contact surface 358 is beveling and/or profiling profile further, so that play an effect that can make the slope of plate 312 displacements; Also promptly play a part similar to above-mentioned slope 40.
Referring now to Figure 10, illustrate three embodiment similar of the present invention to second embodiment.Plate 412 comprises a hole system that limits a bone screw 420, a gasket groove 450 and an adjustment screw hole 422.Gasket groove 450 comprises the top and the bottom 476,478 that a step or slope 480 are arranged therebetween.Packing ring 452 comprises the matte contact surface 458 (as having embossing) of a spherical concave surface, a hole 460 and a highly equal front and rear wall 494,496 that is limited by circular upper flange 492.Antetheca 494 has one than a lower part 500 and a upper conical part 502 of splaying, and should a constant radius of about 80% that be about the antetheca height be arranged than lower part 500, and this part 502 of splaying is extended about 10% of antetheca height.Rear wall 496 has one than a lower part 504 and a upper conical part 506 of splaying, and should a constant radius of about 25% that be about the rear wall height be arranged than lower part 504, and this part 506 of splaying is extended about 65% of rear wall height.Than lower part 500 and 504 identical radius is arranged, longitudinally be offset though its radial center is a longitudinal axis along this hole system.In addition, the part 502 and 506 of splaying is splayed with same angle.Adjust screw 416 and comprise a head 470 with the lower surface of a tapered slope, this lower surface plays action of cam (as described below).Bone screw 414 is similar to screw 14, but its head 460 comprises a matte surface, as has the surface of circumferential groove 510.
In use, the mode of operation of this system is basically similar in appearance to the mode of above-mentioned Fig. 6～9.Both differences are as follows.In the initial position of adjustment screw 416 shown in Figure 10 and packing ring 452, adjust the bottom 500 of the axle 472 butt joint antethecas 494 of screw 416, and the edge of the tapered inferior surface contact flange 492 of the head 470 of adjustment screw.With reference to Figure 11 and 12, when adjustment screw 416 was driven in the hole 422, the slope on the lower surface of head 470 forced the head 460 of packing ring 452 towards bone screw 414.In case packing ring moves to the head of bone screw, the top of adjusting the head 470 of screw is placed in the periphery flange 492 fully, and packing ring 452 is locked in the position.In addition, the matte surface action on contact surface 458 and the head 460 and produce a kind of fixed chain effect.
Referring now to Figure 13 and 14, illustrate four embodiment similar substantially of the present invention to the 3rd embodiment.Both differences are as follows.Groove 650 is short and comprise a rear wall 654, and rear wall 654 is done the sloping, adjusts the taper of lower surface of the head 670 of screw 616 with correspondence.Packing ring 650 does not comprise rear wall, and preferably end at diameter D place or its front of adjusting screw head and the longitudinal axis A traversed by hole system, this structure can produce a less relatively packing ring and less total fastening system, but its function is identical with last embodiment basically.
Referring now to Figure 15, illustrate five embodiment similar of the present invention to the embodiment among Fig. 2.Adjust screw hole 722 and comprise that is gone up the bottom 750 (but visibly different with the embodiment of Fig. 2 be to be provided with the top that taper ground enlarges) that truncated cone shape (or cylindrical shape) part 746, platform 748 and are provided with mechanical whorl.Adjust screw 716 and comprise a head 770 that a upper lateral lip 775 is arranged.
After as described above the bone screw 114 of a fixed angle being inserted bone screw 720, will adjust screw 716 and insert in the adjustment screw hole 722.Can drive bone screw 114, up to realizing desired compressing.The respective shapes of the head 160 by bone screw and the above-mentioned profiling profile (seeing description) of bone screw 720 about bone screw 20.For bone screw 114 is locked in the bone screw 720, drive and adjust screw 116, form compressing up to lateral lip 775 facing to the end face 161 of the head 160 of bone screw 114.
Though described the various bone screw that can adapt, be appreciated that these bone screw can adapt to not just a fixed angle or variable-angle and then be locked at screw on this plate with the screw of the screw of fixed angle and variable-angle.For example, for the screw of a fixed angle, this screw hole can be one and prevent that the bone screw head of truncated cone shape from passing the independent truncated cone shape hole in this hole.Or this hole can be a stepped cylinder, and it provides a kind of similar advantage of the bone screw head corresponding to respective shapes.
This paper has described with illustration a kind of embodiment and using method thereof of using the system of plate fixing bone.Though described specific embodiment of the present invention, the invention is not restricted to this, because expect that scope of the present invention is extensive as this technology and description allow.Therefore, the Technology professional is appreciated that and can carries out other modification to the present invention and do not depart from the scope of claims.
Claims (18)
1. bone plate system comprises:
A) hone lamella comprises one and is used for the bone screw of bone screw, an adjacent adjustment screw hole that is shaped on screw thread and a groove that extends and cross described adjustment screw hole from described bone screw;
B) packing ring that can in the groove of described hone lamella, slide and comprise an elongated hole and a contact surface; And
C) adjustment screw that a rounded nose and are arranged, the axle of described adjustment screw extends in described elongated hole and can be threadably engaged in the described adjustment screw hole, wherein, described adjustment screw is packed in the described adjustment screw hole with screw thread, and the head that the contact surface that makes described packing ring leans described bone screw along side direction is driven and the head of described bone screw is pressed between described hone lamella and the described packing ring;
It is characterized in that, the groove of described hone lamella comprises a rear slopes (354) with the opposed cam-type of described bone screw, packing ring comprises a cam face (356), when described adjustment screw was driven in the described plate, described cam face (356) straddled cam-type rear slopes (354) and goes up and force described packing ring near described bone screw.
2. the bone plate system according to claim 1 is characterized in that, described adjustment screw comprises that drives the cam face that described packing ring leans described bone screw.
3. the bone plate system according to claim 1 is characterized in that, described packing ring is around the described axle of described adjustment screw.
4. the bone plate system according to claim 1 is characterized in that, described packing ring only partly centers on the described axle of described adjustment screw.
5. the bone plate system according to claim 1 is characterized in that, described contact surface has the surface of band texture.
6. bone plate system according to claim 5, it is characterized in that, bone screw has head and one, the head of described bone screw can be packed in the described bone screw, and the axle of described bone screw can stretch out below the lower surface of described plate, the head of described bone screw has the surface of a matte, when its under the power effect during by the contact of described contact surface this matte surface between this bone screw and packing ring, produce a kind of interlocking effect.
7. the bone plate system according to claim 6 is characterized in that, the described matte surface of the head of described bone screw is different with described contact surface.
8. the bone plate system according to claim 1 is characterized in that, the contact surface of described packing ring is spherical concave surface.
9. bone plate system comprises:
A) hone lamella comprises one and is used for the bone screw of bone screw, an adjacent adjustment screw hole that is shaped on screw thread and a groove that extends and cross described adjustment screw hole from described bone screw;
B) packing ring that can in the groove of described hone lamella, slide, described packing ring comprises upper surface, lower surface and the elongated hole that on first direction, passes and extend to described lower surface from described upper surface, described elongated hole with the second direction of first direction traversed by on have microscler orientation, and, described packing ring has contact surface, makes that described contact surface is towards described bone screw when described packing ring is arranged in the groove of described hone lamella; And
C) adjustment screw that a rounded nose and are arranged, the axle of described adjustment screw extends in described elongated hole and can be threadably engaged in the described adjustment screw hole, wherein, described adjustment screw is packed in the described adjustment screw hole with screw thread, and the head that the contact surface that makes described packing ring leans described bone screw along side direction is driven and the head of described bone screw is pressed between described hone lamella and the described packing ring;
It is characterized in that, the groove of described hone lamella comprises a rear slopes (354) with the opposed cam-type of described bone screw, packing ring comprises a cam face (356), when described adjustment screw was driven in the described plate, described cam face (356) straddled cam-type rear slopes (354) and goes up and force described packing ring near described bone screw.
10. the bone plate system according to claim 9 is characterized in that, described contact surface can move in described bone screw.
11. the bone plate system according to claim 9 is characterized in that, described contact surface is spherical concave surface.
12. the bone plate system according to claim 11 is characterized in that, described contact surface has the surface of band texture.
13. the bone plate system according to claim 9 is characterized in that, described elongated hole is around described axle and adjust screw.
14. a bone plate system comprises:
A) hone lamella comprises the bone screw that is used for bone screw, the adjacent adjustment screw hole that is shaped on screw thread and extends and cross the groove of described adjustment screw hole from described bone screw;
B) packing ring that moves in the groove of described hone lamella, described packing ring comprise upper surface, lower surface, cam face (356), relative contact surface and elongated hole,
C) adjust screw for one, have the head of a band tapered slope lower surface and one, described axle in described elongated hole, extend and with described adjustment screw hole screw-threaded engagement; And
The groove of wherein said hone lamella comprises a rear slopes (354) with the opposed cam-type of described bone screw, described cam face (356) straddles on the cam-type rear slopes (354), thereby when described adjustment screw is packed described adjustment screw hole into screw thread, the head of adjusting screw forces in the cam face (356) of packing ring, make packing ring laterally drive the head of bone screw, so that between the contact surface of hone lamella and packing ring, compress the head of bone screw.
15. the bone plate system according to claim 14 is characterized in that, described packing ring can slide in the groove of described hone lamella.
16. the bone plate system according to claim 14 is characterized in that, described contact surface can move in described bone screw.
17. the bone plate system according to claim 14 is characterized in that, described contact surface is spherical concave surface.
18. the bone plate system according to claim 17 is characterized in that, described contact surface has the surface of band texture.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US58613104P | 2004-07-07 | 2004-07-07 | |
| US60/586,131 | 2004-07-07 | ||
| US11/040,779 US20050187551A1 (en) | 2002-12-02 | 2005-01-21 | Bone plate system with bone screws fixed by secondary compression |
| US11/040,779 | 2005-01-21 | ||
| PCT/US2005/023855 WO2006014436A1 (en) | 2004-07-07 | 2005-07-05 | Bone plate system with bone screws fixed by secondary compression |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101022767A CN101022767A (en) | 2007-08-22 |
| CN101022767B true CN101022767B (en) | 2011-03-30 |
Family
ID=38710336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800299949A Expired - Fee Related CN101022767B (en) | 2004-07-07 | 2005-07-05 | Bone plate system with bone screws fixed by secondary compression |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101022767B (en) |
| AT (1) | ATE530132T1 (en) |
| ZA (1) | ZA200701078B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8105367B2 (en) | 2003-09-29 | 2012-01-31 | Smith & Nephew, Inc. | Bone plate and bone plate assemblies including polyaxial fasteners |
| US8382807B2 (en) | 2005-07-25 | 2013-02-26 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2616798C (en) | 2005-07-25 | 2014-01-28 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| KR101632652B1 (en) * | 2014-04-18 | 2016-07-01 | 백혜선 | A fixation tool for opening wedge high tibial osteotomy |
| CN105411660A (en) * | 2014-09-17 | 2016-03-23 | 镱钛科技股份有限公司 | Rear stop structure of dynamic hip screw |
| CN105615968A (en) * | 2016-03-28 | 2016-06-01 | 刘明忱 | Fracture three-dimensionally-intersecting-connecting-locking internal fixing device |
| CN109330672B (en) * | 2018-12-11 | 2024-04-12 | 北京爱康宜诚医疗器材有限公司 | Locking steel plate and locking steel plate assembly with same |
| HRP20190451A2 (en) * | 2019-03-06 | 2020-09-18 | Janoš Kodvanj | Screw with a variable locking angle and the corresponding system of locking |
| CN110279460B (en) * | 2019-07-05 | 2020-08-04 | 重庆医科大学附属永川医院 | Adjustable combined bone nail plate |
| CN117817011B (en) * | 2024-03-05 | 2024-04-30 | 东方蓝天钛金科技有限公司 | Machining device and machining method for bolt open pin hole |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379642A (en) * | 1999-10-13 | 2002-11-13 | Sdgi控股股份有限公司 | Anterior cervical plating system and method |
-
2005
- 2005-07-05 AT AT05768389T patent/ATE530132T1/en not_active IP Right Cessation
- 2005-07-05 CN CN2005800299949A patent/CN101022767B/en not_active Expired - Fee Related
-
2007
- 2007-02-06 ZA ZA200701078A patent/ZA200701078B/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379642A (en) * | 1999-10-13 | 2002-11-13 | Sdgi控股股份有限公司 | Anterior cervical plating system and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8105367B2 (en) | 2003-09-29 | 2012-01-31 | Smith & Nephew, Inc. | Bone plate and bone plate assemblies including polyaxial fasteners |
| US8382807B2 (en) | 2005-07-25 | 2013-02-26 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US8888824B2 (en) | 2005-07-25 | 2014-11-18 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE530132T1 (en) | 2011-11-15 |
| ZA200701078B (en) | 2008-09-25 |
| CN101022767A (en) | 2007-08-22 |
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