CN108926380B - Front tibialis distance joint fusion dissection, locking and pressurization internal fixation device - Google Patents
Front tibialis distance joint fusion dissection, locking and pressurization internal fixation device Download PDFInfo
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- CN108926380B CN108926380B CN201810700526.9A CN201810700526A CN108926380B CN 108926380 B CN108926380 B CN 108926380B CN 201810700526 A CN201810700526 A CN 201810700526A CN 108926380 B CN108926380 B CN 108926380B
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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
- A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
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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
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
- A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
Abstract
The invention discloses a preposed tibialis distance joint fusion dissection, locking and pressurization internal fixation device, which comprises a tibiae fixation part, a shape shifting part and a talus fixation part, wherein the tibiae fixation part, the shape shifting part and the talus fixation part are sequentially connected; the tibia fixing part is connected with the talus fixing part in an arc shape through the shape moving part, and the included angle between the tibia fixing part and the plate surface of the talus fixing part is 100-110 degrees; the plate surface of the tibia fixing part is provided with a screw hole vertical to the plate surface; the outer side of the shape shifting part in the width direction is outwards protruded to be widened in an arc shape, and a shape shifting part locking screw hole is formed in the shape shifting part; the side of the plane where the plate surface at the joint of the talus fixing part and the shape shifting part is positioned is convex outwards; two locking screw holes are formed on the plate surface of the talus fixing part; a middle axis direction inside the locking screw hole is not parallel to the normal direction of the board surface of the talus fixing part, and a middle axis direction close to the front outer edge is parallel to the normal direction of the board surface of the talus fixing part. The invention adopts the ergonomic fit design and the optimized screw hole angle, reduces the stress born by the internal fixing device, improves the fixing stability and keeps certain functions of the ankle joint.
Description
Technical Field
The invention relates to an anatomical locking steel plate, in particular to a tibiotalotal joint fusion lateral anatomical locking steel plate. An orthopedic internal fixation device.
Background
In the late treatment of ankle joint function degenerative diseases such as rheumatism/rheumatoid ankle arthritis, gouty ankle arthritis, post-traumatic ankle arthritis and ankle osteoarthritis, under the background of immature ankle joint replacement-ankle joint replacement operation, ankle joint fusion operation is an effective treatment means under the current medical conditions, and is an operation mode which has to be selected by a plurality of patients, clinical experience and research prove that the tibialis joint fusion not only can achieve the treatment effect of multi-ankle joint fusion, but also can keep a certain ankle joint mobility and improve the postoperative experience of the patients, but in the current internal fixing device, a specially designed internal fixing plate for tibialis fusion fixation is not provided, the inventor finishes the internal fixing operation by using the replaced internal fixing plate through manual plasticity, but due to the non-special anatomical plate, the anatomical structure adaptability is poor, and after shaping, the original mechanical properties of the steel plate are changed, and the structural strength cannot be guaranteed.
Found patent document CN 103202725B through retrieval and discloses a shin talus joint fuses outside and dissects locking steel sheet, including platelike shin bone fixed part, talus fixed part and calcaneus fixed part, shin bone fixed part, talus fixed part and calcaneus fixed part connect gradually, talus fixed part and calcaneus fixed part are the arc along the width direction of shin bone fixed part bending in proper order, be 125 ~ 135 between calcaneus fixed part and the shin bone fixed part, the length of talus fixed part is 2.5 ~ 3cm, the length of calcaneus fixed part is 4 ~ 5cm, be equipped with a steel nail fixed orifices on shin bone fixed part, talus fixed part and the calcaneus fixed part at least. The invention has the following problems: internal fixation steel sheet is the shin distance in the outside and dissects the steel sheet with fusing, and this steel sheet is not only fixed shin distance joint, and the joint is down fused tibia, talus, root bone simultaneously as a whole to fixed distance simultaneously, but because the steel sheet is external for the outside, the steel sheet is on a parallel with ankle joint moving surface, and is close with ankle joint moving axis distance, and the side shear stress who receives is great, and the steel sheet receives the shin distance joint, apart from the dual stress of joint down, probably leads to the steel sheet fracture to lead to the internal fixation to become invalid, and the internal fixation has higher inefficacy risk promptly. The tibia, the talus and the radicular bone are fixed, so that not only the tibia distance joint is fused, but also the subtalar joint is fused, the function of the subtalar joint is completely lost, and the degree of functional disorder after the operation is increased.
Disclosure of Invention
In order to solve the technical problem, the invention discloses a locking steel plate which is in accordance with the anatomical form of the outer side of the tibiotalotal joint, is attached to the far end of the tibia and the outer side bone surfaces of the talus and the calcaneus and is used for fusion of the tibiotalotal joint. Meanwhile, the screw holes are more reasonable in spatial arrangement, simple and convenient to use, firm in fixation, small in internal fixation failure probability, convenient to operate and capable of reducing local soft tissue tension.
The internal fixing device is a tibial-talus fusion anatomical steel plate, is arranged on the front side of a tibial-talus joint, only fuses the tibial-talus joint, does not fuse the subtalar joint, reduces the number of fused joints, and ensures that the internal fixing steel plate only needs to resist the stress of the tibial-talus joint due to fewer joint fixing points, so as to achieve the purpose of reducing the stress number of the steel plate while keeping the function of the ankle joint to the maximum extent. Secondly, the surface of the steel plate is vertical to the motion plane of the ankle joint, the surface of the steel plate is only stressed by stretching and squeezing stress, and the actual stress of the steel plate is mainly expressed as the stretching stress because the palmar flexor force of the ankle joint is obviously larger than the dorsiflexor force. According to the biomechanical characteristics of the steel plate, the steel plate has tensile resistance obviously superior to shear resistance, and the incidence rate of steel plate fracture and internal fixation failure can be effectively reduced. In addition, the internal fixing device is parallel to the motion axis of the ankle joint and is far away from the motion axis, so that the stress applied to the steel plate is reduced through the action of moment. In short, the stress quantity is reduced from the three aspects, the action effect of the stress is weakened, the probability of steel plate fracture and internal fixation failure is reduced, and the reliability of the internal fixation device is improved.
Meanwhile, the internal fixing device only performs fusion fixation on the tibialis-talar joint, does not fuse the talar joint, retains the functions of the talar joint after operation, reduces the degree of functional disorder of the ankle joint after operation, and improves the prognosis effect of a patient to subjective feeling on the premise of ensuring the curative effect of the operation.
The technical scheme provided by the invention is as follows:
the utility model provides a fixing device in leading tibialis apart from joint fusion dissection, locking, pressurization, includes the shin bone fixed part, moves shape portion and talus fixed part, the shin bone fixed part, move shape portion and talus fixed part and connect gradually.
The tibia fixing part is arc-shaped connected with the talus fixing part through the shape moving part, and the included angle between the tibia fixing part and the plate surface of the talus fixing part is 100-110 degrees. This angle allows the ankle joint to be in a functional position of 90 degrees of flexion behind the tibia and talus fixed by internal fixation means.
The plate surface of the tibia fixing part is provided with a screw hole vertical to the plate surface.
The shape shifting part is in an outward convex arc shape in the width direction and is provided with a shape shifting part locking hole. The outer convex arc plays a role in widening, the maximum width is 2cm, the strength of the board surface is improved, the stress on the board surface is effectively resisted, and the fracture risk of the inner fixing device is reduced. Simultaneously the shape shifting portion that widens provides sufficient space for the screw trompil, reduces the influence of screw trompil to internal fixation device intensity.
The side of the plane where the plate surface at the joint of the talus fixing part and the shape shifting part is positioned is convex outwards; two locking screw holes are formed on the plate surface of the talus fixing part; a middle axis direction in the locking screw hole is not parallel to the normal direction of the plate surface of the talus fixing part, and a middle axis direction close to the front outer edge is parallel to the normal direction of the plate surface of the talus fixing part.
Furthermore, the tibia fixing portion is convex towards the convex cambered surface of the talus fixing portion in the thickness direction so as to be attached to the front side bone surface of the tibia, the length of the tibia fixing portion is 7-10 cm, and the width of the tibia fixing portion is about 1.5 cm.
Furthermore, the curvature of the outer convex cambered surface of the tibia fixing part gradually decreases towards the shape moving part, and the surface of the connecting end plate of the shape moving part is transited into a plane to be attached to the bone surface of the tibia front ankle.
Furthermore, the number of screw holes on the tibia fixing portion is 4-5. The screw holes of the tibia fixing part are positioned in the center of the surface of the inner fixing device and are longitudinally and uniformly arranged, the second or third holes at the near end are two-in-one pressure screw holes of the locking nail and the common nail, and the other holes are locking screw holes. The pressurization nail hole is used for axial pressurization of the tibia distance joint clearance and the joint pressurization of the tibia fixing portion and the tibia, and the joint degree of the tibia fixing portion and the tibia is increased. The locking screw hole is used for fixing the tibia end and the tibia in an anatomical mode. Screw trompil direction and the perpendicular while of shin bone end front surface tangent line face axis, screw length are shin bone front and back footpath, and two side cortex bones are fixed, increase the pulling force of screw to the steel sheet, reduce the risk of pulling out the nail of each screw of shin bone fixed part.
Furthermore, the outer fringe behind the directional subtalar joint talus articular surface of extension line that above-mentioned shape portion locking screw axis that moves deviates from the shin bone fixed part, the screw pointed end is worn out by the subtalar joint outer fringe and is not got into the subtalar joint, and the screw axis is parallel with talus lateral malleolus side major axis, and screw length is upper surface to subtalar joint back outside edge length before the talus to reach the fixed purpose of two side cortex lycii, increase the stability of screw.
Further, the talus fixation portion is about 2cm long, and the width of the apex of the convex portion at the junction with the shift portion is 2 cm. The talus fixing part is of an arc-shaped plate-shaped structure with a hole; the talus fixed part thickness direction is protruding to the last cambered surface of shin bone stiff end, and the skew face central line of arc top is the outside that is close to slightly, and the upper surface anatomical shape of laminating talus is in order to reduce the extrusion of face to tissues such as skin, subcutaneous tissue, tendon. The talus fixation portion is provided with 2 locking screw holes, one of which is located at the middle position, and the other is close to the arc-shaped top of the anterior outer edge talus fixation portion. The middle screw axis deviates from the directional back inner edge of the subtalar joint talus articular surface of extension line of shin bone fixed part, and is parallel with the ankle side major axis in the talus, and screw length is about 2cm, does not run through the talus, and it is fixed only to go on unilateral cortex lycii, avoids the screw to go deep into talus venous sinus and nourishes and causes apart from bone blood transport obstacle in the arterial plexus. The screw axis direction of outer fringe is perpendicular with the tangent plane at talus fixed part arc top before the talus fixed part, and is parallel with talus joint place plane, avoids the screw to get into talus joint face damage talus joint, and screw length is footpath about the talus, and two side cortex lycii fixed of going increases the pulling force of screw to the steel sheet, increases the stability of shin bone fixed part, reduces the nail pulling risk.
The shape shifting part locking screw hole, the middle locking screw hole and the edge locking screw hole of the talus are respectively used for fixing the anterior part, the posterior internal part and the posterior external part of the talus. The screw axis points to three different directions respectively (perpendicular talus upper surface is down, outer fringe behind the subtalar joint talus articular surface, back inner edge), forms three points, triaxial cross fixation, increases the effective fixed position of talus, avoids the stress direction of screw and the axis of screw parallel simultaneously, reduces and pulls out nail, disconnected nail risk.
The invention has the beneficial effects that:
1. the device only performs fusion fixation on the tibialis-talar joint, retains the functions of the subtalar joint, the talonavicular joint and other joints, retains the functions of the ankle joint to a certain extent, and avoids the complete stiffness of the ankle joint;
2. the front internal fixing device is used for keeping the main body part of the internal fixing device away from the motion axis of the ankle joint bending and stretching movement, so that the shearing force of the internal fixing device formed by the muscle strength of the bending and stretching ankle is avoided, the internal fixing fracture risk is reduced, and the internal fixing reliability is improved;
3. by reducing the number of the fixed points and optimizing the positions of the fixed points and the direction of the screw holes, the purposes of reducing the number of stress, weakening the stress effect, reducing the failure probability of the internal fixation and further improving the reliability of the internal fixation device are achieved;
4. the tibia fixing part and the talus fixing part are designed by using an optimized angle, so that the fit degree of the internal fixing device with the tibia and the talus in the application process is increased, and the stability is improved;
5. the convex arc design on the shape shifting part increases the width of the board surface and improves the strength of the board surface, and is used for tapping holes of screw holes to reduce the tapping density and the influence of the tapping holes on the strength;
6. the talus fixed part adopts the design above the laminating talus, and fixed reliability is high, and the screw adopts the angle of optimizing to carry out the trompil, increases screw effort and fixed stability, reduces and pulls out the nail risk.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
FIG. 2 is a rear view structural diagram of the present invention;
FIG. 3 is a left/outside view structural diagram of the present invention;
FIG. 4 is a right/interior view structural diagram of the present invention;
FIG. 5 is a top view of the present invention;
FIG. 6 is a bottom view of the present invention;
FIG. 7 is a diagram illustrating an exemplary use of the present invention;
FIG. 8 is an angle view of the locking screw of the traveling part;
FIG. 9 is an angled view of the talus locking screw;
reference numerals: 1-tibial fixation, 2-shaped displacement, 3-talar fixation, a1, a2, a4, a 5-tibial locking screw, A3-tibial compression screw, B1-shaped displacement locking screw, C1, C2-talar locking screw, alpha-tibial part included angle with talar part, wherein arrow direction is direction of screw axis.
Detailed Description
The present invention will be further described with reference to specific examples, but the present invention is not limited thereto.
Fig. 1 and 2 show the structure of the present invention. The utility model provides a fixing device in leading tibialis apart from joint fusion dissection, locking, pressurization, includes shin bone fixed part 1, shape portion 2 and talus fixed part 3 move, shin bone fixed part 1, shape portion 2 and talus fixed part 2 connect gradually, wholly are "L" type, as shown in fig. 3, 4. For convenience of expression, a front view is taken as a reference, a horizontal plane is defined as an x plane, a vertical plane which is perpendicular to the tibial fixing part panel and passes through a longitudinal axis of the tibial fixing part is defined as a y plane, and a plane which is parallel to the tibial fixing part and passes through the tibial fixing part is defined as a z plane; the lateral malleolus is defined as the lateral direction and the medial malleolus is defined as the medial direction (as shown in fig. 7).
First, the structure of the tibia securing portion 1:
the tibia fixing portion 1 is an outward arc surface in the thickness direction to be attached to the front side bone surface of the tibia, and is 7-10 cm long and about 1.5cm wide. The camber of the evagination cambered surface of shin bone fixed part reduces towards shape portion direction of shifting gradually, changes into the plane with the link curved surface that shape portion shifted, and aim at and shin bone anterior malleolus surface laminating as far as possible avoid the obvious gap between fixing device and shin bone. The number of screw holes on the tibia fixing part is 4-5. The screw holes of the tibia fixing part are positioned in the center of the surface of the inner fixing device and are longitudinally and uniformly arranged, the second or third holes at the near end are two-in-one pressurizing screw holes of the locking nail and the common nail, and the other holes are locking screw holes. The pressurization screw hole is used for axial pressurization of the tibia distance joint clearance and the joint pressurization of the tibia fixing portion and the tibia, and the joint degree of the tibia fixing portion and the tibia is increased. The locking screw hole is used for fixing the tibia end and the tibia. The opening directions of the screw holes A1-A5 are perpendicular to the tangent line of the front surface of the tibia end and are also perpendicular to the axis of the plate surface, namely the axis of the screw hole of the tibia fixing part is perpendicular to the z surface. Tibia fixed part screw length is the shin bone front-back footpath, and aim at realizes that the two side cortex lycii of shin bone is fixed, increases the pulling force of screw to the steel sheet and the stability of screw, reduces the risk of pulling out of each screw of shin bone fixed part.
Second, the structure of the traveling section 2:
the shape shift part 2 is arc-shaped and convex in the width direction, and the convex part is provided with a shape shift part locking hole B1, as shown in figures 5 and 6. The main body in the thickness direction of the shape moving part is a plane, and the part connected with the talus fixing part is gradually bent towards the talus fixing part to form an arc surface so as to be attached to the upper surface of a talus. The outer edge of the shape moving part 2 protrudes outwards to play a role in widening, the maximum width is 2cm, the strength of the board surface is improved, the stress on the board surface is effectively resisted, and the risk of fracture of the internal fixing device is reduced. Meanwhile, the widened shape shifting part 2 provides sufficient space for the screw hole opening, and the influence of the screw hole opening on the strength of the internal fixing device is reduced; and the positions of the screw holes are extended outwards relatively, so that the distance between the screw holes is increased, and the effectiveness of the internal fixing device for fixing the talus is improved.
The medial axis of the locking screw hole B1 points posteriorly and laterally away from the extension of the tibial fixation portion to the posterior lateral edge of the subtalar joint surface. Preferably, the axis of the locking screw hole B1 is angled approximately 80 degrees from the x-plane and the projection of the axis of the locking screw hole B1 on the y-plane is angled approximately 40 degrees back from the z-plane, as shown in FIG. 8. The screw axis points to the subtalar joint outer fringe for outside major axis coincidence behind screw direction and the talus, length are the preceding last outside marginal length of back of talus, and two side cortex lycii are fixed, increase the stability of screw.
Thirdly, the structure of the talus fixing part 3:
the talar fixing part 3 is about 2cm long, and the width of the apex of the convex part where it joins the shaped displacement part 2 is 2 cm. The thickness direction of the talus fixing part is an upward convex cambered surface which is convex towards the tibia fixed end and is similar to a tile shape, as shown in fig. 7, the cambered top deviates from the middle line of the plate surface and is slightly close to the outer side, and the anatomical shape of the upper surface of the talus is fitted to reduce the extrusion of the plate surface on the skin, subcutaneous tissues, tendons and other tissues. The talar fixing portion 3 is provided with 2 locking screw holes, one of which is located at a middle position near the transition portion C1 and the other is located near the front outer edge C2.
Preferably, the included angle between the central axis direction of the locking screw hole C1 and the x-plane is 80 °, and the included angle between the projection of the central axis of the locking screw hole C1 on the y-plane and the x-plane is 40 ° backward, as shown in fig. 9, so that the screw points backward (i.e. points to the right back side on the schematic diagram with reference to the right tibial distance joint) to the posterior border of the subtalar joint (i.e. coincides with the long axis direction of the posterior medial side of the talus), and the cortical bone is fixed on one side, thereby avoiding the blood circulation obstruction caused by the screw penetrating into the artery and vein sinus of the. Locking screw C2 axis direction is perpendicular with the tangent plane of talus top cambered surface, is on a parallel with talus joint articular surface, and length is footpath about the talus, and two side cortex lycii natures of going are fixed, avoid the screw to get into talus joint articular surface damage talus joint, increase the pulling force of screw to the steel sheet, increase the stability of shin bone fixed part 3, reduce the nail pulling risk.
The locking screw hole B1 of the shape shifting part 2 and the locking screw holes C1 and C2 of the talus fixing part 3 are respectively used for fixing the posterior external part and the posterior internal part of the talus to the anterior part. The screw holes point to three different directions respectively to form three-point and three-axis crossed fixation, so that the effective fixation position of the talus is increased, the stress direction of the screw is prevented from being perpendicular to the axis of the screw, and the risk of nail pulling and breaking is reduced.
Fourth, connection mode
The tibia fixing part 1 is arc-connected with the talus fixing part 3 through the shape moving part 2, and an included angle alpha between the tibia fixing part and the plate surface of the talus fixing part is 100-110 degrees, as shown in fig. 3. This angle allows the ankle joint to be in a functional position of 90 degrees of flexion behind the tibia and talus fixed by internal fixation means.
Fifth, use method
The use method of the internal fixing device is shown in figure 7, the internal fixing device is arranged on the front side of the tibia and the upper side of the talus, the long axis of the tibia fixing part is parallel to the long axis of the tibia, the parallel moving part is parallel to the tibial talus joint plane and is horizontal, the talus fixing part is arranged on the upper surface of the talus, and the axis is parallel to the axis of the talus. The tibia fixed end screws are vertical to the plate surface, the directions of the screws of the moving part and the talus fixing part are shown as short lines in the figure, and the bending and extending angles of the tibia distance joints after the locking screws and the compression screws are locked are fixed at the ankle joint functional positions.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
Claims (4)
1. An anterior tibialis distance joint fusion dissection, locking and pressurization internal fixation device is characterized in that:
the tibia fixing part, the shape shifting part and the talus fixing part are sequentially connected;
the tibia fixing part is connected with the talus fixing part in an arc shape through the shape moving part, and the included angle between the tibia fixing part and the plate surface of the talus fixing part is 100-110 degrees;
the plate surface of the tibia fixing part is provided with a screw hole vertical to the plate surface;
the width direction of the shape shifting part is an outward convex arc shape, and a shape shifting part locking screw hole is arranged on the shape shifting part;
the side of the plane where the plate surface at the joint of the talus fixing part and the shape shifting part is positioned is convex outwards; two locking screw holes are formed on the plate surface of the talus fixing part; a middle axis direction inside the locking screw hole is not parallel to the normal direction of the board surface of the talus fixing part, and a middle axis direction close to the front outer edge is parallel to the normal direction of the board surface of the talus fixing part; the talus fixing part is about 2cm long, and the width of the vertex of the convex part at the joint of the talus fixing part and the shape shifting part is 2 cm;
the thickness direction of the tibia fixing part is a convex cambered surface which is convex to the talus fixing part so as to be attached to the front bone surface of the tibia, and the length of the tibia fixing part is 7-10 cm, and the width of the tibia fixing part is about 1.5 cm;
the curvature of the outer convex cambered surface of the tibia fixing part is gradually reduced towards the shape shifting part, and the outer convex cambered surface and the connecting end of the shape shifting part are in a plane so as to be attached to the bone surface of the anterior malleolus of the tibia; the screw holes of the tibia fixing part are positioned in the center of the plate surface of the inner fixing device and are longitudinally and uniformly arranged, the second or third hole at the near end is a two-in-one pressurizing screw hole of a locking nail and a common nail, and the other screw holes are locking screw holes; the length of the tibia fixing part screw is the anterior-posterior diameter of the tibia;
the central axis of the locking screw hole of the shape shifting part deviates from the extension line of the tibia fixing part and points to the rear outer edge of the subtalar joint talus joint surface;
the thickness direction of the talus fixing part is an upward cambered surface which is convex to the tibia fixing part, and the top of the cambered surface deviates from the midline of the talus fixing part so as to be attached to the upper surface bone surface of the talus;
the locking screw hole in the talus fixing part points to the rear inner edge of the talus joint surface of the subtalar joint, and the locking screw hole in the front outer edge is parallel to the normal direction of the plate surface of the talus fixing part and is parallel to the plane of the talus joint.
2. The internal fixation device as claimed in claim 1, wherein: the number of screw holes in the tibia fixing portion is 4-5.
3. The internal fixation device as claimed in claim 1, wherein: the outer edge of the shape shifting part gradually protrudes outwards, and the width of the shape shifting part gradually increases from 1.5cm to 2 cm.
4. The internal fixation device as claimed in claim 1, wherein: the locking screw hole of the front outer edge of the talus fixing part is formed in the top of the cambered surface of the talus fixing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810700526.9A CN108926380B (en) | 2018-06-29 | 2018-06-29 | Front tibialis distance joint fusion dissection, locking and pressurization internal fixation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810700526.9A CN108926380B (en) | 2018-06-29 | 2018-06-29 | Front tibialis distance joint fusion dissection, locking and pressurization internal fixation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108926380A CN108926380A (en) | 2018-12-04 |
| CN108926380B true CN108926380B (en) | 2021-03-16 |
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| CN201810700526.9A Active CN108926380B (en) | 2018-06-29 | 2018-06-29 | Front tibialis distance joint fusion dissection, locking and pressurization internal fixation device |
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| GB201904862D0 (en) | 2019-04-05 | 2019-05-22 | Nephin Ventures Ltd | A bone reduction and fixation plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2007250537A1 (en) * | 2006-05-17 | 2007-11-22 | Gordon Slater | Ankle fusion plate |
| US20100057133A1 (en) * | 2008-08-26 | 2010-03-04 | Simon William H | Tibia-talus-calcaneus (T-T-C) locking plate |
| CN102551862A (en) * | 2010-12-28 | 2012-07-11 | 北京国人骨科医疗器械有限公司 | Anatomical tibia far-end inner-side bridge-type bone fracture plate |
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