CN117694983B - Connecting piece and bone external fixator with same - Google Patents
Connecting piece and bone external fixator with same Download PDFInfo
- Publication number
- CN117694983B CN117694983B CN202410161749.8A CN202410161749A CN117694983B CN 117694983 B CN117694983 B CN 117694983B CN 202410161749 A CN202410161749 A CN 202410161749A CN 117694983 B CN117694983 B CN 117694983B
- Authority
- CN
- China
- Prior art keywords
- needle
- bolt
- hole
- rod
- needle clamp
- 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.)
- Active
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims description 69
- 229910000831 Steel Inorganic materials 0.000 claims description 67
- 239000010959 steel Substances 0.000 claims description 67
- 230000000903 blocking effect Effects 0.000 description 4
- 210000004872 soft tissue Anatomy 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000002303 tibia Anatomy 0.000 description 1
- 206010043827 tibia fracture Diseases 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
The invention relates to a connecting piece and an external bone fixator with the same, comprising a pipe fitting, a rod piece and an adjusting mechanism, wherein the adjusting mechanism comprises an adjusting ring, a limiting group and a locking piece; when the locking piece is separated from the adjusting ring, the rod piece can be slidably inserted into the pipe fitting to realize large-size adjustment; when the locking piece is fixed with the adjusting ring, the adjusting ring is rotated, so that the locking piece can move relative to the rod piece through threads to achieve fine adjustment. The large-size coarse adjustment can be realized through the cooperation among the adjusting ring, the limiting group and the locking piece, the locking piece is driven to rotate together through the rotating adjusting ring, the rod piece can move in the axial direction in a small size through the threaded cooperation, and the fine adjustment is realized; the thread matching can realize that the position is stable after loosening, and fine adjustment can be realized; greatly reduces the times and time of adjustment, reduces the pain of patients and is convenient and quick to operate.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a connecting piece and an external bone fixator with the same.
Background
External bone anchors are now an important tool for the treatment of bone fractures, including skeletal orthotics. During treatment, the ring frames are sleeved on the outer sides of the limbs, the ring frames are connected and fixed through telescopic connecting pieces, the common connecting pieces comprise sleeves and inserted bars, the inserted bars are inserted into the sleeves and locked and fixed through bolts, and the inserted bars are used for realizing the interval adjustment of the adjacent ring frames through the telescopic operation of the inserted bars in the sleeves.
However, the length adjustment mode of the existing connecting piece is single, when the large-size adjustment is carried out, the inserted link is directly inserted into the sleeve to be locked, the locking is coarse adjustment, when the fine adjustment is needed, the bolt is required to be loosened to be realized by a certain inserted link, the inserted link can possibly generate displacement in the sleeve after the bolt is loosened, the fine adjustment is inaccurate in size, the adjustment is not in place, the repeated adjustment is needed, a large amount of time is needed to be consumed, and meanwhile, the pain is also needed to be born by a patient for a long time.
Disclosure of Invention
The invention aims to solve the technical problem of providing a connecting piece capable of combining coarse adjustment and fine adjustment and realizing rapid adjustment and an external bone fixator with the connecting piece.
The technical scheme adopted for solving the technical problems is as follows: the connecting piece comprises a hollow pipe fitting, a rod piece capable of being inserted into the pipe fitting and an adjusting mechanism arranged on the pipe fitting, wherein the adjusting mechanism comprises an adjusting ring which rotates by taking the axis of the pipe fitting as an axis, a limiting group which limits the axial movement of the adjusting ring, and a locking piece which can be fixed or separated from the adjusting ring, the locking piece is sleeved on the rod piece, and threads are arranged between the locking piece and the rod piece; when the locking piece is separated from the adjusting ring, the rod piece can be slidably inserted into the pipe fitting to realize large-size adjustment; when the locking piece is fixed with the adjusting ring, the adjusting ring is rotated, so that the locking piece can be moved relatively with the rod piece through threads to achieve fine adjustment.
Further specifically, the limiting group comprises a protruding edge formed by outwards extending the outer surface of the pipe fitting along the radial direction and a positioning groove positioned on the inner surface of the adjusting ring, and the protruding edge is inserted into the positioning groove.
Further specifically, the limiting group comprises a protruding edge formed by outwards extending the outer surface of the pipe fitting along the radial direction and a connecting ring sleeved on the pipe fitting and positioned in the adjusting ring, a positioning groove is formed between the end face of the connecting ring and the adjusting ring, and the protruding edge is inserted into the positioning groove.
Further specifically, the limiting group comprises a protruding edge formed by outwards extending the outer surface of the pipe fitting along the radial direction, a first positioning groove arranged on the cylindrical surface of the protruding edge, a second positioning groove arranged on the inner surface of the adjusting ring, and a limiting ring inserted into the first positioning groove and the second positioning groove simultaneously.
Further specifically, the protruding edge is annular, at least one clamping groove is formed in the protruding edge, a mounting hole is formed in the adjusting ring, a spring and a positioning ball are arranged in the mounting hole, and the clamping groove is located on the movement path of the positioning ball.
Further specifically, the locking piece is fixed with the adjusting ring through threads.
Further specifically, a locking threaded hole is formed in the adjusting mechanism, a locking bolt is installed in the locking threaded hole, the locking bolt is screwed into the locking threaded hole, and the end portion of the locking bolt abuts against the rod piece.
Further specifically, a ball joint is disposed at an end of the pipe away from the rod, and a ball joint is disposed at an end of the rod away from the pipe.
Further specifically, an extension tube is sleeved outside the pipe fitting, a locking group is arranged on the extension tube, and the locking group limits the extension tube and the pipe fitting to move in the axial direction.
Further specifically, a strip-shaped limit groove is formed in the extension cylinder along the axial direction, a limit rod is arranged at the end part of the pipe fitting, which is far away from the rod piece, and the limit rod is inserted into the limit groove and can slide along the axial direction in the limit groove.
Further specifically, a strip-shaped limit groove is formed in the extension cylinder along the axial direction, a limit threaded hole is formed in the end portion, far away from the rod piece, of the pipe fitting, and the locking group comprises a pressing plate and a limit bolt penetrating through the pressing plate and screwed into the limit threaded hole.
Further specifically, a ball joint is provided at the end of the extension tube away from the rod member, and a ball joint is provided at the end of the rod member away from the pipe member.
An external bone fixator comprises a plurality of ring frames and the connecting pieces, wherein the connecting pieces are used for connecting different ring frames.
More specifically, at least one needle clip is arranged on at least one ring frame of the plurality of ring frames, a steel needle is fixed in the needle clip, and the steel needle is inserted into the bone.
Further specifically, at least one needle clamp fixing hole is formed in the ring frame, and the needle clamp fixing hole is a round hole or a waist hole; the needle clamp is arranged in the needle clamp fixing hole and comprises a needle clamp bolt, a needle clamp nut and a needle clamp cushion block, and the needle clamp bolt sequentially passes through the needle clamp cushion block and the ring frame and is fixed through the needle clamp nut; the needle clamp bolt comprises a bolt head and a bolt rod, a first pressing groove is formed in one face, close to the bolt rod, of the bolt head, a second pressing groove is formed in one face, close to the bolt head, of the needle clamp cushion block, and the first pressing groove is matched with the second pressing groove to clamp the Kirschner wire.
Further specifically, a first limiting surface is arranged on the bolt rod part, a second limiting surface is arranged on the inner wall of the central hole of the needle clamp cushion block, after the bolt rod part penetrates through the needle clamp cushion block to be in place, the first limiting surface and the second limiting surface are matched to prevent the needle clamp bolt from rotating relative to the needle clamp cushion block, and the first pressing groove is matched with the second pressing groove in position.
Further specifically, at least one needle clamp fixing hole is formed in the ring frame, and the needle clamp fixing hole is a round hole or a waist hole; the needle clamp is arranged in the needle clamp fixing hole and comprises a needle clamp bolt, a needle clamp nut and a needle clamp cushion block, and the needle clamp bolt sequentially passes through the needle clamp cushion block and the ring frame and is fixed through the needle clamp nut; the needle clamp bolt comprises a bolt head part and a bolt rod part; the needle clamp bolt is provided with a steel needle pressing hole, the steel needle pressing hole is arranged along the radial direction of the needle clamp bolt, one surface of the needle clamp cushion block, which is close to the head of the bolt, is provided with a steel needle pressing groove, and at least part of the steel needle pressing hole can enter the central hole of the needle clamp cushion block; the steel needle pressing holes are matched with the steel needle pressing grooves to clamp the threaded half nails.
Further specifically, at least one third limiting surface is arranged on the bolt head along the axial direction, a fourth limiting surface is arranged on one surface, close to the bolt head, of the needle clamp cushion block, the number of the third limiting surface is consistent with that of the fourth limiting surface, the needle clamp bolt and the needle clamp cushion block are prevented from rotating relatively by position matching, and the steel needle pressing hole is matched with the steel needle pressing groove in position.
Further specifically, a needle clamp fixing piece is arranged on the ring frame, a needle clamp fixing hole is formed in the needle clamp fixing piece, the needle clamp is arranged in the needle clamp fixing hole, and the needle clamp fixing hole is a waist hole.
The beneficial effects of the invention are as follows: the large-size rough adjustment can be realized through the cooperation among the adjusting ring, the limiting group and the locking piece, when the locking piece is separated from the adjusting ring, the rod piece can move in a large range along the axial direction inside the pipe fitting, when the locking piece is fixed with the adjusting ring, the rod piece can not move when the locking piece does not rotate through the threaded cooperation between the rod piece and the locking piece, the locking piece is driven to rotate together through the rotating adjusting ring, the small-size movement of the rod piece along the axial direction inside the pipe fitting can be realized through the threaded cooperation, and the fine adjustment is realized; the thread matching can realize that the position is stable after loosening, and fine adjustment can be realized; greatly reduces the times and time of adjustment, reduces the pain of patients and is convenient and quick to operate.
Drawings
FIG. 1 is a schematic view of a first embodiment of a connector of the present invention;
FIG. 2 is a schematic exploded view of a first embodiment of the connector of the present invention;
FIG. 3 is a schematic view of the first embodiment of the connector of the present invention with the adjusting ring and the connecting ring;
FIG. 4 is a schematic view of a second embodiment of a connector of the present invention;
FIG. 5 is a schematic exploded view of a second embodiment of the connector of the present invention;
FIG. 6 is a schematic view of the structure of a first embodiment of the connector (with ball joint) of the present invention;
FIG. 7 is a schematic view of a second embodiment of the connector (with ball joint) of the present invention;
FIG. 8 is a schematic view of the construction of a first embodiment of the connector of the present invention (with an extension barrel);
FIG. 9 is a schematic view of a second embodiment of the connector of the present invention (with an extension barrel);
FIG. 10 is a schematic view of the ball-and-socket joint of the present invention;
FIG. 11 is a schematic view of the structure of the external bone anchor of the present invention;
FIG. 12 is a schematic view of the assembled structure of the ring carrier, needle clip and steel needle (Kirschner wire) of the invention;
FIG. 13 is a schematic view of the needle clip for holding a Kirschner wire according to the invention;
FIG. 14 is a schematic view of the assembled construction of the ring carrier, needle clip holder and steel needle (threaded half-nail) of the present invention;
fig. 15 is a schematic view of the structure of the needle clip for fixing the threaded half nail according to the present invention.
In the figure: 10. a pipe fitting; 20. a rod piece; 30. an adjusting mechanism; 40. a locking member; 50. a ball joint; 60. an extension tube; 70. a ring frame; 80. a needle clip; 90. a steel needle;
11. a convex edge; 12. a clamping groove; 13. a first positioning groove; 14. a limit rod;
31. An adjusting ring; 311. a cylinder; 312. a blocking ring; 313. a first hole; 32. a connecting ring; 321. a second hole; 33. a locking bolt; 34. a positioning ball; 35. a spring; 36. a mounting hole; 37. a mounting surface; 38. a second positioning groove; 39. a limiting ring;
51. a ball nut; 52. ball head; 53. ball bowl; 54. a sleeve; 55. a connecting bolt;
61. A limit groove; 62. a limit bolt; 63. a pressing plate;
71. A needle clip fixing hole; 72. a needle clip fixing member;
81. a needle clamp bolt; 811. a bolt head; 812. a bolt shank; 813. a first pressing groove; 814. a first limiting surface; 815. steel needle press holes; 816. a third limiting surface; 82. a needle clip nut; 83. a needle clip cushion block; 831. a second pressing groove; 832. the second limiting surface; 833. a steel needle pressing groove; 834. a fourth limiting surface; 84. a steel needle sleeve.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention is an improvement based on the prior art of the external bone fixator, and organically combines large-size rough adjustment and small-size fine adjustment, so that the external bone fixator has the advantages of rapidness and accuracy in use and is more convenient to operate.
1-5, The connecting piece comprises a hollow pipe fitting 10, a rod piece 20 which can be inserted into the pipe fitting 10 and an adjusting mechanism 30 arranged on the pipe fitting 10, wherein one part of the adjusting mechanism 30 acts on the pipe fitting 10 and one part acts on the rod piece 20, so that the relative position of the rod piece 20 and the pipe fitting 10 is adjusted; the adjusting mechanism 30 comprises an adjusting ring 31 which can rotate by taking the axis of the pipe fitting 10 as the shaft, a limiting group which limits the movement of the adjusting ring 31 in the axial direction, and a locking piece 40 which can be fixed or separated from the adjusting ring 31, wherein the locking piece 40 is sleeved on the rod piece 20, threads are arranged between the locking piece 40 and the rod piece 20, namely, internal threads are arranged in the locking piece 40, external threads are arranged on the rod piece 20, and the internal threads are matched with the external threads.
When large-size adjustment, i.e. coarse adjustment, is required, the locking member 40 is separated from the adjustment ring 31, and the rod member 20 can move in large size inside the pipe member 10, and the locking member 40 also moves together with the rod member 20.
When small-size adjustment is needed, namely fine adjustment is needed, the locking piece 40 and the adjusting ring 31 are fixed, at the moment, the adjusting ring 31 and the locking piece 40 cannot move in the axial direction of the pipe fitting 10 due to the action of the limiting group, and the internal threads on the locking piece 40 limit the movement of the rod piece 20 in the axial direction of the pipe fitting 10; meanwhile, the adjusting ring 31 can rotate around the axis of the pipe fitting 10, at this time, the adjusting ring 31 is manually rotated to rotate the locking member 40, and the locking member 40 is in threaded connection with the rod member 20, so that the rod member 20 moves in the axial direction in a threaded driving manner.
A locking threaded hole is formed in the adjusting mechanism 30, a locking bolt 33 is arranged in the locking threaded hole, the end of the locking bolt 33 is screwed into the locking threaded hole to prop against the rod piece 20, the rod piece 20 is fixed through the locking bolt 33, and meanwhile, the rotation of the adjusting ring 31 is limited; loosening the lock bolt 33 again achieves a fine tuning function.
For the limiting group, the limiting group is arranged at one end of the pipe fitting 10, the end is used for inserting the rod piece 20, and in the scheme, the limiting group can have three structural forms:
The first structural style, the spacing group includes protruding edge 11 that is formed by pipe fitting 10 surface outwards extending along radial direction and the constant head tank that is located adjusting ring 31 internal surface, protruding edge 11 inserts in the constant head tank, be clearance fit between protruding edge 11 and the constant head tank to make things convenient for adjusting ring 31 to rotate, the cooperation between protruding edge 11 and the constant head tank makes adjusting ring 31 can not follow axial motion.
Based on the first structure, a locking screw hole penetrates the adjusting ring 31, and a locking bolt 33 abuts against the rod 20 through the locking screw hole.
In a second structural form, as shown in fig. 2 and 3, the limiting group comprises a protruding edge 11 formed by extending the outer surface of the pipe 10 outwards along the radial direction, and a connecting ring 32 sleeved on the pipe 10 and positioned in the adjusting ring 31, wherein a positioning groove is formed between the end surface of the connecting ring 32 and the adjusting ring 31, and the protruding edge 11 is inserted into the positioning groove; here, the adjusting ring 31 includes a cylinder 311 and a blocking ring 312 formed by extending an end of the cylinder 311 inward in a radial direction, the coupling ring 32 may be received inside the cylinder 311, and a positioning groove is formed between an end surface of the blocking ring 312 and an end surface of the coupling ring 32.
Based on the second structure, the locking threaded hole comprises a first hole 313 arranged on the adjusting ring 31 and a second hole 321 arranged on the connecting ring 32, and after the first hole 313 is aligned with the second hole 321, the locking bolt 33 passes through the first hole 313 and the second hole 321 to be abutted against the rod 20; at least one of the first hole 313 and the second hole 321 is a threaded hole.
In a third structural form, as shown in fig. 4 and 5, the limiting group includes a flange 11 formed by extending the outer surface of the pipe 10 along the radial direction, a first positioning groove 13 disposed on the cylindrical surface of the flange 11, a second positioning groove 38 disposed on the inner surface of the adjusting ring 31, and a limiting ring 39 inserted into the first positioning groove 13 and the second positioning groove 38 at the same time; here, the widths of the first positioning groove 13 and the second positioning groove 38 need to be slightly larger than the thickness of the limiting ring 39, so that the rotation of the adjusting ring 31 is facilitated; the limiting ring 39 is designed as an annular member with an opening, firstly, the limiting ring 39 is clamped into the first positioning groove 13, then the opening is reduced by external force, so that the diameter of the limiting ring 39 is reduced, the limiting ring can enter the adjusting ring 31, when the limiting ring 39 enters the second positioning groove 38, the external force is removed, the diameter of the limiting ring 39 is restored to be larger than the inner diameter of the adjusting ring 31, and the limiting ring is embedded into the second positioning groove 38, so that the installation is realized.
Based on the third structure, a locking screw hole penetrates the adjusting ring 31, and a locking bolt 33 abuts against the rod 20 through the locking screw hole.
When the limiting group adopts the first and third structural forms, the locking piece 40 is fixedly connected with the adjusting ring 31, and when the limiting group adopts the second structural form, the locking piece 40 can be fixedly connected with the adjusting ring 31 or the connecting ring 32; the fixed connection can be bolt fixing, buckle fixing or thread fixing; in this solution, screw fixation is used, while in order to prevent loosening of the screw in use, the screw may be designed for non-return, for example with a blocking pin arranged radially; here, the locking member 40 has two threads, a first thread and a second thread, wherein the first thread has a larger diameter than the second thread, the first thread is connected with the adjusting ring 31 or the connecting ring 32, and the second thread is connected with the thread on the rod 20.
Further, in order to facilitate calculation of the adjustment distance during fine adjustment, in this embodiment, as shown in fig. 2 and 5, the protruding edge 11 is annular, at least one clamping groove 12 is provided on the protruding edge 11, a mounting hole 36 is provided in the adjustment ring 31, a spring 35 and a positioning ball 34 are provided in the mounting hole 36, and the clamping groove 12 is located on the movement path of the positioning ball 34; at least 2 groups of springs 35 and positioning balls 34 are combined, and the number of the springs 35 and the positioning balls 34 can be one, but in order to ensure the balance in use, two groups of springs 35 and the positioning balls 34 are arranged and uniformly distributed; the mounting hole 36 is a blind hole or a through hole blocked by the other end, the spring 35 is firstly mounted at the bottom of the mounting hole 36, the positioning ball 34 is placed at the end part of the spring 35, after the adjusting ring 31 is positioned, the spring 35 pushes the positioning ball 34 outwards, the positioning ball 34 contacts with the convex edge 11, the positioning ball 34 rotates along with the rotation of the adjusting ring 31, so that the positioning ball 34 moves on the convex edge 11, in the process, the positioning ball 34 enters or leaves the clamping groove 12, so as to confirm the number of turns of the rotation of the adjusting ring 31, and then the movement distance of the rod 20 in the axial direction is calculated according to the screw pitch of the rod 20; at the same time, the positioning ball 34 is matched with the clamping groove 12, after the positioning ball is finely adjusted in place, if no rotating force is applied, the positioning ball 34 cannot be separated from the clamping groove 12, so that the position cannot be deviated after the fine adjustment.
The fine adjustment calculation method can also be used for calculating the number of turns by setting a first mark on the pipe 10 and a second mark on the adjusting ring 31 and by the relative movement of the two marks.
The mounting positions of the clamping groove 12, the mounting hole 36, the spring 35 and the positioning ball 34 may have two forms, firstly, the clamping groove 12 may be disposed in the radial direction, that is, the clamping groove 12 may be disposed on the cylindrical surface of the flange 11, the corresponding mounting hole 36 is disposed on the cylindrical surface inside the adjusting ring 31, and at this time, the axis of the mounting hole 36 is perpendicular to the axis of the adjusting ring 31; second, the clamping groove 12 may be disposed on the end surface of the flange 11 along the axial direction, and the corresponding mounting hole 36 is disposed on the end surface of the inner portion of the adjusting ring 31, where the axis of the mounting hole 36 is parallel to the axis of the adjusting ring 31.
Meanwhile, as shown in fig. 6 and 7, the end part of the pipe fitting 10 far away from the rod member 20 is provided with a spherical universal joint 50, and the end part of the rod member 20 far away from the pipe fitting 10 is also provided with a spherical universal joint 50, so that the connecting piece can be inclined at will in the use process through the arrangement of the spherical universal joint 50, and the connecting piece can be suitable for different occasions.
The ball joint 50 as shown in fig. 10 comprises a connecting bolt 55 fixed to the end of the pipe 10 or the rod 20, a sleeve 54 fixed to the connecting bolt 55, a ball bowl 53 arranged inside the sleeve 54, a ball head 52 arranged inside the sleeve 54, a ball head nut 51 connected to the ball head 52, and an annular baffle arranged at the end of the sleeve 54; the annular baffle is positioned at one end far away from the connecting bolt 55, and the diameter of the central hole of the annular baffle is smaller than that of the ball 52 so as to prevent the ball 52 from sliding out of the sleeve 54; the connecting bolt 55 is in threaded connection with the sleeve 54, an arc-shaped surface is arranged on the ball bowl 53, the ball head 52 is arranged in the arc-shaped surface, and the ball head 52 can rotate in any direction in the ball bowl 53; the ball nut 51 is fixed to the ring frame 70 (shown in fig. 11, 12 and 14) by welding or bolting.
The connecting piece can be designed into various specifications according to requirements, for example, the connecting piece can be distinguished as different specifications according to the longest distance adjusted by the connecting piece, so that the connecting piece can be conveniently selected for use according to different positions; in some situations, not every standard can be configured completely, and when a long standard connector is needed, a short standard connector cannot be used, so the scheme designs the extension tube 60 which is applied to the connector to expand the application range of the connector.
The extension cylinder 60 may be hollow inside and sleeved outside the pipe 10 as shown in fig. 8 and 9, i.e., the pipe 10 may be inserted into the extension cylinder 60, a locking group may be provided on the extension cylinder 60 to adjust the extension cylinder 60 to a desired length, and then the extension cylinder 60 and the pipe 10 may be locked by the locking group, and movement between the extension cylinder 60 and the pipe 10 in the axial direction may be restricted when the locking group is locked.
In order to prevent the relative rotation between the extension cylinder 60 and the pipe 10, a bar-shaped limit groove 61 is provided on the extension cylinder 60 along the axial direction, and a limit rod 14 is provided on the end of the pipe 10 far from the rod 20 as shown in fig. 8, wherein the limit rod 14 is inserted into the limit groove 61 and can slide along the axial direction in the limit groove 61; the limit lever 14 is arranged in a radial direction.
The locking group has at least two structures according to the requirement,
In the first structure, as shown in fig. 8, a limit threaded hole is formed in the extension tube 60, the locking group is a limit bolt 62, and the limit bolt 62 passes through the limit threaded hole in the radial direction and abuts against the cylindrical surface of the pipe 10, so that positioning in the axial direction is achieved, and positioning in the radial direction is achieved through cooperation of the limit rod 14 and the limit groove 61.
In a second structure, as shown in fig. 9, the stop lever 14 is integrated with the stop bolt 62, a stop threaded hole is provided at the end of the pipe 10 far away from the rod 20, and the locking set includes a pressing plate 63 and the stop bolt 62 threaded into the stop threaded hole through the pressing plate 63; the limit bolts 62 sequentially penetrate through the pressing plate 63 and the limit groove 61 and are screwed into the limit threaded holes, the pressing force acts on the extension cylinder 60 through the pressing plate 63 to achieve positioning in the axial direction, and the limit bolts 62 and the limit groove 61 are matched to achieve positioning in the radial direction.
Based on a connection with an extension tube 60, in use, a ball joint 50 is provided at the end of the extension tube 60 remote from the rod member 20, and a ball joint 50 is also provided at the end of the rod member 20 remote from the tube member 10.
Based on the above-mentioned structure of the connecting piece, the connecting piece and the ring frame 70 can be matched to form a new external bone fixator (as shown in fig. 11), and the external bone fixator comprises a plurality of ring frames 70 and the connecting piece, wherein the connecting piece is used for connecting different ring frames 70; the structures of the plurality of ring frames 70 may be the same or different, and may be selected according to practical situations, for example, the ring frames 70 may be different in size, and the ring frames 70 may not be parallel when assembled; so that the external bone fixator for different parts can be formed; the connecting piece and the ring frame 70 can be directly connected by bolts or can be connected by spherical universal joints; the a, b, c, d distribution as in fig. 11 corresponds to the use of the tibia fracture, calf extension, deformity correction, and tibia high osteotomy; e in fig. 11 corresponds to the use of the connector in combination with the extension cylinder in correction of deformity of the foot.
On the basis of the above, it is required to mount various specifications of steel needles on the external bone fixator, as shown in fig. 12 and 14, at least one needle clip 80 is disposed on at least one of the plurality of ring frames 70, and steel needles 90 are fixed in the needle clip 80, and the steel needles 90 are inserted into bones, where the number and positions of the needle clips 80 and the steel needles 90 are finally determined according to the specific condition of the patient; meanwhile, the ring frame 70 is provided with at least one needle clip fixing hole 71, and according to requirements, the ring frame 70 can also be provided with a needle clip fixing piece 72, and the needle clip fixing piece 72 is provided with the needle clip fixing hole 71; the needle clamp fixing hole 71 is a round hole or a waist hole, and the waist hole takes the center of the ring frame 70 as the circle center and takes an arc shape; all round holes or the round holes and waist holes exist simultaneously on the ring frame, and the round holes and the waist holes exist simultaneously and are arranged at intervals in the scheme.
The needle clip 80 is disposed in the needle clip fixing hole 71, as shown in fig. 13 and 15, the needle clip 80 includes a needle clip bolt 81, a needle clip nut 82, and a needle clip pad 83, and the needle clip bolt 81 passes through the needle clip pad 83 and the ring frame 70 in sequence, and is fixed by the needle clip nut 82; the needle clamp bolt 81 includes a bolt head 811 and a bolt shank 812; the needle clamp bolt 81 is matched with the needle clamp cushion block 83 to fix the steel needle 90; while two types are mainly used for the steel needle 90, a k-wire and a threaded half-pin.
When the steel needle 90 is a k-wire, as shown in fig. 13, a first pressing groove 813 is formed on a surface of the bolt head 811 near the bolt shaft 812, a second pressing groove 831 is formed on a surface of the needle holder cushion block 83 near the bolt head 811, and the shapes of the first pressing groove 813 and the second pressing groove 831 can be various shapes, such as arc, V-shape, square, etc., in this scheme, V-shape is selected, so as to adapt to k-wires with different diameters; the first press groove 813 and the second press groove 831 cooperate to clamp the k-wire.
Meanwhile, in order to ensure that the positions of the first pressing groove 813 and the second pressing groove 831 are aligned in the installation process, a first limiting surface 814 is arranged on the bolt rod portion 812, a second limiting surface 832 is arranged on the inner wall of the central hole of the needle clamp cushion block 83, after the bolt rod portion 812 passes through the needle clamp cushion block 83 to be in place, the first limiting surface 814 and the second limiting surface 832 are aligned and matched to prevent relative rotation between the needle clamp bolt 81 and the needle clamp cushion block 83, and at the moment, the first pressing groove 813 and the second pressing groove 831 are aligned, so that dislocation of the two is prevented.
When the steel needle 90 is a half screw, as shown in fig. 15, a steel needle pressing hole 815 is formed in the needle clamping bolt 81, the steel needle pressing hole 815 is formed along the radial direction of the needle clamping bolt 81 (i.e., the radial direction of the bolt rod 812), a steel needle pressing groove 833 is formed on one surface of the needle clamping cushion block 83, which is close to the bolt head 811, the steel needle pressing hole 815 is matched with the steel needle pressing groove 833 for clamping the half screw, at least part of the steel needle pressing hole 815 can enter into the central hole of the needle clamping cushion block 83, at least part of the steel needle pressing hole 815 enters into the central hole of the needle clamping cushion block 83, so that part of the steel needle 90 contacts with the steel needle pressing hole 815, and the other part of the steel needle 90 corresponding to the steel needle pressing hole is contacted with the steel needle pressing groove 833; a part of the steel needle pressing hole 815 penetrates through the bolt head 811, and the other part penetrates through the bolt rod 812, so that the steel needle 90 has a larger contact area when contacting with the steel needle pressing hole 815; the steel needle pressing hole 815 passes through the center position of the needle clamp bolt 81, and the steel needle pressing groove 833 passes through the center position of the needle clamp cushion block 83, namely the steel needle pressing groove 833 is divided into two parts which are respectively positioned at two sides of the center hole of the needle clamp cushion block 83; the shape of the contact part of the steel needle pressing hole 815 and the steel needle 90, and the shape of the steel needle pressing groove 833 can be various shapes, such as arc, V-shape, square, etc., and arc is adopted in the present embodiment.
Meanwhile, in order to ensure that the positions of the steel needle pressing hole 815 and the steel needle pressing groove 833 are aligned in the installation process, at least one third limiting surface 816 is arranged on the bolt head 811 along the axial direction, a fourth limiting surface 834 is arranged on one surface of the needle clamp cushion block 83 close to the bolt head 811, the number of the third limiting surfaces 816 is consistent with that of the fourth limiting surfaces 834, in the scheme, two third limiting surfaces 816 are respectively positioned on two opposite sides of the bolt head 811, and the number of the fourth limiting surfaces 834 are also two and are respectively positioned on two sides of the needle clamp cushion block 83; the needle clamp cushion block 83 is close to one surface of the bolt head 811, two sides of the needle clamp cushion block are respectively raised upwards to form a step, and the fourth limiting surface 834 is positioned in the step; the positions of the third limiting surface 816 and the fourth limiting surface 834 are correspondingly matched, so that relative rotation between the needle clamp bolt 81 and the needle clamp cushion block 83 is prevented, and the steel needle pressing hole 815 and the steel needle pressing groove 833 are aligned at the moment, so that dislocation of the needle clamp bolt 81 and the needle clamp cushion block 83 is prevented.
Further, in order to adapt to the threaded half nails with different diameters, a steel needle sleeve 84 is arranged in the steel needle pressing hole 815, and the steel needle sleeve 84 is sleeved on the threaded half nails; the steel needle sleeves 84 have the same outer diameter and different inner diameters, and the steel needle sleeves 84 are properly selected for matching according to the outer diameter of the threaded half nails.
Aiming at the threaded half nail, the clamping steps are as follows:
s1, penetrating a steel needle pressure hole 815 with a soft tissue protection sleeve and propping against a bone surface, and adjusting a needle clamp nut 82 to fix the soft tissue protection sleeve; here, the clamping is not needed to be too tight, and only the clamping is needed to be fixed;
S2, drilling holes in the bone surface through the soft tissue protection sleeve by using a drill bit;
S3, screwing a threaded half nail into the hole of the bone surface;
S5, taking out the soft tissue protection sleeve;
S6, sleeving a steel needle sleeve 84 and adjusting a needle clamp nut 82 to lock the needle clamp 80.
In summary, in the connecting piece of the present invention, through the use of the adjusting mechanism, that is, through the cooperation of the adjusting ring 31, the limiting group and the locking member 40, coarse adjustment with large size and fine adjustment with small size are realized, when the locking member 40 is separated from the adjusting ring 31, the rod 20 can move in a large range along the axial direction inside the pipe 10, when the locking member 40 is fixed with the adjusting ring 31, the threaded cooperation between the rod 20 and the locking member 40 can ensure that the rod 20 cannot move when the locking member 40 does not rotate, the locking member 40 is driven to rotate together by rotating the adjusting ring 31, and small movement of the rod 20 along the axial direction inside the pipe 10 can be realized through threaded cooperation, so as to realize fine adjustment; the thread matching can not only keep stable position after loosening, but also realize fine adjustment; the movement of the regulating ring 31 in the axial direction can be limited by the design of three structures of the limiting group; meanwhile, the number of rotation turns is acquired through the cooperation among the clamping groove 12, the spring 35 and the positioning ball 34, and the dimension of the fine adjustment of the axial direction of the rod piece 20 can be calculated by cooperating with the screw pitch on the rod piece 20; by using the extension tube 60, the small-sized connector can be used as a large-sized connector, so that the application range is wider; by using two needle clamping structures for different types of steel needles 90, the stability and convenience of clamping are improved; the connecting piece and the external bone fixator adopting the scheme greatly reduce the adjusting times and time, reduce the pain of patients and are convenient and quick to operate.
It is emphasized that: the above embodiments are merely preferred embodiments of the present invention, and the present invention is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (15)
1. The connecting piece is characterized by comprising a hollow pipe fitting (10), a rod piece (20) capable of being inserted into the pipe fitting (10) and an adjusting mechanism (30) arranged on the pipe fitting (10), wherein the adjusting mechanism (30) comprises an adjusting ring (31) which rotates by taking the axis of the pipe fitting (10) as an axis, a limiting group which limits the axial movement of the adjusting ring (31) and a locking piece (40) which can be fixed or separated from the adjusting ring (31), and the locking piece (40) is sleeved on the rod piece (20); when the locking piece (40) is separated from the adjusting ring (31), the rod piece (20) can be slidably inserted into the pipe fitting (10) to realize large-size adjustment; when the locking piece (40) is fixed with the adjusting ring (31), the adjusting ring (31) is rotated so that the locking piece (40) moves relative to the rod piece (20) through threads to realize fine adjustment;
the locking piece (40) is internally provided with two threads, namely a first thread and a second thread, wherein the diameter of the first thread is larger than that of the second thread, the first thread is connected with the adjusting ring (31), and the second thread is connected with the threads on the rod piece (20);
Calculating according to the number of turns of the adjusting ring (31) and the screw pitch of the rod piece (20) to obtain a fine adjustment distance;
The limiting group comprises a convex edge (11) formed by outwards extending the outer surface of the pipe fitting (10) along the radial direction, a first positioning groove (13) arranged on the cylindrical surface of the convex edge (11), a second positioning groove (38) arranged on the inner surface of the adjusting ring (31), and a limiting ring (39) inserted into the first positioning groove (13) and the second positioning groove (38) at the same time; the widths of the first positioning groove (13) and the second positioning groove (38) are larger than the thickness of the limiting ring (39), and the limiting ring (39) is an annular piece with an opening.
2. The connector according to claim 1, characterized in that the flange (11) is annular and at least one clamping groove (12) is provided on the flange (11), a mounting hole (36) is provided inside the adjusting ring (31), a spring (35) and a positioning ball (34) are provided in the mounting hole (36), and the clamping groove (12) is located on the movement path of the positioning ball (34).
3. A connection according to claim 1, characterized in that a locking threaded hole is provided in the adjustment mechanism (30), in which locking threaded hole a locking bolt (33) is mounted, the locking bolt (33) being screwed into the locking threaded hole and its end abutting the rod (20).
4. A connection according to claim 1, characterized in that a ball joint (50) is provided at the end of the tube member (10) remote from the rod member (20), and a ball joint (50) is provided at the end of the rod member (20) remote from the tube member (10).
5. A connection according to claim 1, characterized in that an extension tube (60) is provided around the tube (10), and that a locking group is provided on the extension tube (60), which locking group limits the movement of the extension tube (60) and the tube (10) in the axial direction.
6. The connector according to claim 5, characterized in that a bar-shaped limit groove (61) is provided in the extension tube (60) in the axial direction, a limit rod (14) is provided at the end of the tube (10) remote from the rod member (20), and the limit rod (14) is inserted into the limit groove (61) and is slidable in the axial direction in the limit groove (61).
7. The connecting piece according to claim 5, characterized in that a bar-shaped limit groove (61) is provided on the extension tube (60) along the axial direction, a limit threaded hole is provided at the end of the pipe (10) far away from the rod (20), and the locking group comprises a pressing plate (63) and a limit bolt (62) screwed into the limit threaded hole through the pressing plate (63).
8. A connection according to claim 5, characterized in that a ball joint (50) is provided at the end of the extension tube (60) remote from the rod (20) and a ball joint (50) is provided at the end of the rod (20) remote from the tube (10).
9. An external bone fixator comprising a plurality of ring frames (70) and a connector according to any of claims 1 to 8 for connecting different ring frames (70).
10. The external bone fixator of claim 9 wherein at least one needle clip (80) is provided on at least one of said plurality of rings (70) and wherein a steel needle (90) is secured within said needle clip (80), said steel needle (90) being inserted into bone.
11. The external bone fixator of claim 10 wherein the ring (70) is provided with at least one needle clip fixation hole (71), the needle clip fixation hole (71) being a circular or lumbar hole; the needle clamp (80) is arranged in the needle clamp fixing hole (71), the needle clamp (80) comprises a needle clamp bolt (81), a needle clamp nut (82) and a needle clamp cushion block (83), and the needle clamp bolt (81) sequentially penetrates through the needle clamp cushion block (83) and the ring frame (70) and is fixed through the needle clamp nut (82); the needle clamp bolt (81) comprises a bolt head (811) and a bolt rod portion (812), a first pressing groove (813) is formed in one face, close to the bolt rod portion (812), of the bolt head (811), a second pressing groove (831) is formed in one face, close to the bolt head (811), of the needle clamp cushion block (83), and the first pressing groove (813) is matched with the second pressing groove (831) to clamp a Kirschner wire.
12. The external bone fixator of claim 11 wherein a first stop surface (814) is provided on the bolt shank (812) and a second stop surface (832) is provided on the inner wall of the central bore of the needle clamp pad (83), the first stop surface (814) and the second stop surface (832) cooperate to prevent relative rotation of the needle clamp bolt (81) and the needle clamp pad (83) after the bolt shank (812) passes through the needle clamp pad (83) in place, and the first indent (813) and the second indent (831) are matched in position.
13. The external bone fixator of claim 10 wherein the ring (70) is provided with at least one needle clip fixation hole (71), the needle clip fixation hole (71) being a circular or lumbar hole; the needle clamp (80) is arranged in the needle clamp fixing hole (71), the needle clamp (80) comprises a needle clamp bolt (81), a needle clamp nut (82) and a needle clamp cushion block (83), and the needle clamp bolt (81) sequentially penetrates through the needle clamp cushion block (83) and the ring frame (70) and is fixed through the needle clamp nut (82); the needle clamp bolt (81) comprises a bolt head (811) and a bolt rod (812); a steel needle pressing hole (815) is formed in the needle clamp bolt (81), the steel needle pressing hole (815) is formed in the radial direction of the needle clamp bolt (81), a steel needle pressing groove (833) is formed in one surface, close to the bolt head (811), of the needle clamp cushion block (83), and at least part of the steel needle pressing hole (815) can enter a central hole of the needle clamp cushion block (83); the steel needle pressing hole (815) is matched with the steel needle pressing groove (833) to clamp the threaded half nail.
14. The bone external fixator as claimed in claim 13 wherein at least one third limit surface (816) is provided on the bolt head (811) along the axial direction, a fourth limit surface (834) is provided on a surface of the needle clamp pad (83) close to the bolt head (811), the number of the third limit surface (816) is consistent with that of the fourth limit surface (834) and the position matching prevents the needle clamp bolt (81) and the needle clamp pad (83) from rotating relatively, and the steel needle pressing hole (815) is matched with the steel needle pressing groove (833) in position.
15. The bone external fixator according to claim 10, characterized in that a needle clip fixing member (72) is provided on the ring frame (70), a needle clip fixing hole (71) is provided on the needle clip fixing member (72), the needle clip (80) is provided in the needle clip fixing hole (71), and the needle clip fixing hole (71) is a waist hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410161749.8A CN117694983B (en) | 2024-02-05 | 2024-02-05 | Connecting piece and bone external fixator with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410161749.8A CN117694983B (en) | 2024-02-05 | 2024-02-05 | Connecting piece and bone external fixator with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117694983A CN117694983A (en) | 2024-03-15 |
| CN117694983B true CN117694983B (en) | 2024-05-28 |
Family
ID=90151973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410161749.8A Active CN117694983B (en) | 2024-02-05 | 2024-02-05 | Connecting piece and bone external fixator with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117694983B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3224800A (en) * | 1963-05-13 | 1965-12-21 | Up Right Inc | Adjustable supporting leg |
| US4111217A (en) * | 1976-07-09 | 1978-09-05 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence | Arctic tent pole |
| EP0018448A1 (en) * | 1979-04-24 | 1980-11-12 | Alfryn Ieuan John | Self-locking adjustable support devices |
| US5863292A (en) * | 1996-09-26 | 1999-01-26 | Tosic; Aleksandar | Articulated external orthopedic fixation system and method of use |
| WO2001015611A1 (en) * | 1999-08-30 | 2001-03-08 | Smith & Nephew, Inc. | Six axis external fixator strut |
| CN105114578A (en) * | 2015-07-28 | 2015-12-02 | 重庆长安汽车股份有限公司 | Quick high-precision micro-distance adjusting device |
| CN110742412A (en) * | 2019-12-04 | 2020-02-04 | 江西世安科技发展有限公司 | Wardrobe telescopic adjusting support rod |
| CN112932636A (en) * | 2021-04-02 | 2021-06-11 | 北京市富乐科技开发有限公司 | Orthopedic external fixation support |
| WO2023147415A2 (en) * | 2022-01-28 | 2023-08-03 | Paragon 28, Inc. | External fixation systems and methods of use |
| CN117297732A (en) * | 2023-09-28 | 2023-12-29 | 苏州益诺斯医疗科技有限公司 | External fixator for correcting long bone deformity |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2085037B1 (en) * | 2008-02-01 | 2013-07-24 | Stryker Trauma SA | Telescopic strut for an external fixator |
| US20230193936A1 (en) * | 2021-12-20 | 2023-06-22 | Stryker European Operations Limited | Quick Release Mechanism for Strut |
-
2024
- 2024-02-05 CN CN202410161749.8A patent/CN117694983B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3224800A (en) * | 1963-05-13 | 1965-12-21 | Up Right Inc | Adjustable supporting leg |
| US4111217A (en) * | 1976-07-09 | 1978-09-05 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence | Arctic tent pole |
| EP0018448A1 (en) * | 1979-04-24 | 1980-11-12 | Alfryn Ieuan John | Self-locking adjustable support devices |
| US5863292A (en) * | 1996-09-26 | 1999-01-26 | Tosic; Aleksandar | Articulated external orthopedic fixation system and method of use |
| WO2001015611A1 (en) * | 1999-08-30 | 2001-03-08 | Smith & Nephew, Inc. | Six axis external fixator strut |
| CN105114578A (en) * | 2015-07-28 | 2015-12-02 | 重庆长安汽车股份有限公司 | Quick high-precision micro-distance adjusting device |
| CN110742412A (en) * | 2019-12-04 | 2020-02-04 | 江西世安科技发展有限公司 | Wardrobe telescopic adjusting support rod |
| CN112932636A (en) * | 2021-04-02 | 2021-06-11 | 北京市富乐科技开发有限公司 | Orthopedic external fixation support |
| WO2023147415A2 (en) * | 2022-01-28 | 2023-08-03 | Paragon 28, Inc. | External fixation systems and methods of use |
| CN117297732A (en) * | 2023-09-28 | 2023-12-29 | 苏州益诺斯医疗科技有限公司 | External fixator for correcting long bone deformity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117694983A (en) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8197518B2 (en) | Thread-thru polyaxial pedicle screw system | |
| US8663290B2 (en) | Top loading polyaxial ball and socket fastener with saddle | |
| US7942909B2 (en) | Thread-thru polyaxial pedicle screw system | |
| US7951173B2 (en) | Pedicle screw implant system | |
| US8968324B2 (en) | Adjustable jig and method for targeting interlocking holes of an intramedullary nail | |
| US9192398B2 (en) | Orthopedic implant insertion handle and aiming guide | |
| US7854751B2 (en) | Percutaneous access devices and bone anchor assemblies | |
| EP2134279B1 (en) | Hip fracture device with static locking mechanism allowing compression | |
| US8523862B2 (en) | Bone plate aiming block | |
| US8075603B2 (en) | Locking polyaxial ball and socket fastener | |
| US7722645B2 (en) | Pedicle screw spinal fixation device | |
| US7004943B2 (en) | Devices, systems, and methods for placing and positioning fixation elements in external fixation systems | |
| US4432358A (en) | Compression hip screw apparatus | |
| US20070100342A1 (en) | System for intramedullary rod fixation and method therefor | |
| US20170245870A1 (en) | Surgical drill guide having keyway for axial alignment of a fastener for use for an orthopedic plate | |
| CN109069194A (en) | For temporarily fastening the medical instrument of polyaxial pedicle screw | |
| CN102149343A (en) | Short pin for taking care of epiphysis fractures | |
| US10258385B1 (en) | Bottom loading polyaxial ball and socket fastener with blocking ring with notched split ring | |
| KR20130127435A (en) | Bone plate assembly with guide member | |
| CA2855796A1 (en) | Top loading polyaxial ball and socket fastener | |
| CN117694983B (en) | Connecting piece and bone external fixator with same | |
| CN215458575U (en) | Lock hole aiming frame for intramedullary nail | |
| JP2002515782A (en) | External fixed clamp and system | |
| CN209884310U (en) | Fixing frame and resetting system | |
| CN110338894B (en) | Pedicle screw capable of being fixed by double screws |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |