CN205322463U - Shin bone near -end coaptation board system - Google Patents

Abstract

The utility model relates to a shin bone near -end coaptation board system, coaptation board system includes preceding outside coaptation board, back outside coaptation board, the inboard coaptation board in back, inboard coaptation board. Its advantage shows: the utility model discloses a shin bone near -end coaptation board system to the special coaptation board of the different position designs of tibial plateau, on anatomy measuring result's basis, confirms the shape in advance, and angle and regular length guarantee that reasonable screw sum of distribution enters to follow closely direction, make full use of tibial plateau's fixed space to and the structural morphology of shin bone, the steel plate for fixation of fracture that makes tibial plateau correspond is fixed definite, fixed effectual, makes tibial plateau's fracture can reach anatomic reduction.

Description

Proximal Tibia Plating System

technical field

The utility model relates to the technical field of medical instruments, in particular to a proximal tibial bone plate system.

Background technique

Tibial plateau fracture is a common injury in trauma orthopedics. With the increasing number of traffic accidents, its incidence is also on the rise. Tibial plateau fractures are intra-articular fractures, which often affect the function of the knee joint due to the destruction of the articular surface of the tibial plateau. It is difficult to treat, and it is easy to leave joint dysfunction.

In recent years, in order to facilitate the treatment of tibial plateau fractures, the tibial plateau has been divided into types, namely the lateral column of the tibial plateau, the medial column of the tibial plateau, and the posterior column of the tibial plateau. The bone plate used for treatment can be divided into anterolateral bone plate, posterolateral bone plate, posteromedial bone plate, and medial bone plate.

The anterolateral bone plate is placed on the anterolateral side of the tibial plateau, which must meet the requirements of reliable performance, conforming to both biomechanical and anatomical characteristics. The number of nail positions in the condyle is not enough, and the fixation is not stable enough, which brings many unfavorable factors to postoperative fracture healing and rehabilitation sports. The stimulation is large, which will make the patient feel uncomfortable.

The posterolateral plate is placed on the posterolateral side of the tibial plateau. The anatomical structure of the posterolateral tibial plateau is complex, and neurovascular and important tendons are covered here. Therefore, the traditional posterolateral fixation method of the tibial plateau is to first indirectly fix the bone via the anterolateral tibial plateau. After reduction, enter from the anterolateral side to the posterolateral side, and then perform indirect fixation, but this method of fixation often faces the problem that the posterolateral side of the tibial plateau cannot be reduced or fixed, and bone plates specifically used for the posterolateral side of the tibial plateau are also rare. Therefore, sometimes bone plates from other parts can only be used to fix posterolateral fractures of the tibial plateau, but the shape of the bone plate fits poorly with the bone surface, and the comfort level after implantation is not very good.

The posteromedial bone plate is mainly placed on the posteromedial side of the tibial plateau, and its main function is to fix the fracture fragment and maintain the flatness of the tibial plateau. In the prior art, L-shaped steel plates or “clover”-shaped steel plates with the tip cut off are usually used, which cannot be completely conformed to the bone. Posterior condyle shape.

The medial plate is placed primarily medially posterior to the tibial plateau. Because tibial plateau fractures are caused by valgus of the knee joint, the articular surface of the plateau is generally a split fracture on the medial side, but the fracture line often moves from the anteromedial to the posterolateral side and often involves ligament damage. Part of the load-bearing surface is broken and collapsed, and the curative effect is not good. Traumatic arthritis, joint instability and joint dysfunction are often left behind. In the prior art, the method of using the medial bone plate with screws is usually used for treatment, but the existing medial bone plate has the following deficiencies: 1. The existing medial bone plate moves most of the fracture line towards the medial tibial plateau fracture from the anterior medial to the posterior lateral Inaccurate fixation; 2. The tibial plateau articular surface cannot achieve anatomical reduction.

To sum up, there is an urgent need for a proximal tibial plate system with good anatomical shape, firm and precise fixation, which can maintain the flat tibial plateau and achieve anatomical reduction. See report.

Contents of the invention

The purpose of the utility model is to address the deficiencies in the prior art and provide a proximal tibial bone plate system with good anatomical shape, precise fixation, firm fixation, level tibial plateau, and anatomical reduction.

In order to achieve the above object, the technical scheme that the utility model takes is:

A proximal tibial bone plate system, the bone plate system includes an anterolateral bone plate, a posterolateral bone plate, a posteromedial bone plate, and a medial bone plate;

The anterolateral bone plate presents a "T shape" as a whole, and the anterolateral bone plate includes a proximal head, a curved connection portion, and a straight distal portion; the proximal head includes a first side portion and a second side portion; The first side is provided with five locking screw holes, and the diameter of the locking screw holes is 3.5mm; the second side is provided with two locking screw holes, and the locking screw holes on the second side are The axial direction of the screw hole is 90 degrees to the axial direction of the locking screw hole on the first side; five locking screw holes are also provided on the curved surface connection part, and the edge profile of the proximal head is wavy , Hollow nails can be driven into the trough; the proximal head and the curved surface connection part are also provided with Kirschner wire holes; the straight part of the distal end is provided with sliding holes and locking screw holes; the distal end The inner wall of the straight face is provided with a fan-shaped concave arc surface; the tail end of the distal straight face is a triangle with a circular arc, and the tail end of the triangle is also provided with a Kirschner hole;

The posterolateral bone plate has an overall "oblique T shape", and the posterolateral bone plate includes a proximal curved plate and a distal curved plate; the connection between the distal curved plate and the proximal curved plate is an inclined structure, and the distal The angle between the axial direction of the curved plate and the axial direction of the proximal curved plate is 66°; the proximal curved plate is provided with four locking screw holes, and the diameter of the locking screw holes is 2.7mm; the distal curved The length of the panel is less than 5cm, and there are four locking screw holes on the distal curved panel, and the diameter of the locking screw holes is 3.5mm;

The posteromedial bone plate has a "T shape" as a whole, and the posteromedial bone plate includes a transverse section, a transition section, and a longitudinal section; the transverse section has three locking screw holes; the longitudinal section has five locking screw holes ; The transition section is a curved surface structure, and the transition section is provided with a locking screw hole and a sliding hole;

The medial bone plate has a "T-shaped" shape as a whole. The medial bone plate includes a slope section, a tail section, and a head section; the tail section is provided with six locking screw holes; the head section is provided with four locking screw holes. Screw holes, the diameter of the locking screw hole is 3.5mm, the head section is a curved surface structure, and the edge of the head section is wave-shaped; the slope section is provided with two locking screw holes; the head section and The slope section is provided with Kirschner wire holes and locking screw holes; the tail section is provided with locking screw holes and sliding holes.

The four locking screw holes on the curved surface connection part of the anterolateral bone plate are adjacent, and the other locking screw hole is located at the remote end of the curved surface connection part; the three locking screw holes near the head of the proximal end are distributed in a triangle.

The locking screw holes on the anterolateral bone plate are connected with corresponding screws; the five screws on the first side are axially consistent, and the axes of the screws on the second side and the screws on the first side are perpendicular to each other.

There are four adjacent screws on the curved surface connecting portion of the anterolateral bone plate, and the axial directions of the four adjacent screws are not parallel, and the screw located on the curved surface connecting portion is not in the same direction as the other four adjacent screws.

Screws are installed in the locking screw holes of the proximal curved plate of the posterolateral bone plate, and the axial directions of the screws are parallel to each other; parallel.

Screws are installed in the locking screw holes of the transverse section of the posteromedial bone plate, and the axial directions of the screws are parallel to each other; screws are installed in the locking screw holes of the longitudinal section, and the axial directions of the screws are parallel; The wall surface is provided with a fan-shaped concave arc surface.

Screws are installed in the locking screw holes of the head section of the medial bone plate, and the screws are axially consistent; screws are installed in the locking screw holes of the tail section, and the screws are axially consistent; Concave arc.

The utility model has the advantages that:

1. A proximal tibial bone plate system of the present utility model is designed with special bone plates for different orientations of the tibial plateau. On the basis of anatomical measurement results, determine the shape, angle and fixation length in advance to ensure reasonable screw distribution and screw insertion direction, make full use of the fixation space of the tibial plateau and the structural shape of the tibia, so that the bone plate corresponding to the tibial plateau The fixation is exact, the fixation effect is good, and the anatomical reduction is achieved;

2. The anterolateral bone plate presents a "T shape" as a whole, and the proximal end utilizes the space above the fibular head, which can fix most anterolateral fractures or even posterolateral fractures; the first side of the anterolateral bone plate is equipped with five 3.5mm The unique locking screw hole adopts the nail row technology, which is more reliable than the existing bone plate to fix the fracture fragment;

3. There are two locking screw holes on the second side of the anterolateral bone plate. The screws assembled in the locking screw holes are distributed at 90 degrees to the screws assembled on the first side. The two screws on the second side are From front to back, it can interlock with the screw on the first side to fix the anterolateral fracture fragment, and can also be used to fix the posterolateral fracture fragment;

4. The overall posterolateral bone plate is "oblique T-shaped", which can effectively avoid the shielding of the fibula and make it easier to expose during the operation;

5. The proximal curved plate of the posterolateral bone plate is fixed above the fibula head, making use of the space above the fibular head;

6. The distal curved plate of the posterolateral bone plate is inclined to the proximal curved plate, and the length of the distal curved plate is less than 5cm, avoiding the occlusion of the fibular head and important anatomical structures such as the posterolateral complex and the anterior tibial artery;

7. The overall shape of the posteromedial bone plate is "T", and its transverse section and transition section are designed according to the outline shape of the posteromedial tibial plateau, so as to fix the fracture fragment and keep the tibial plateau flat, completely conforming to the shape of the posterior condyle;

8. The medial bone plate is "T-shaped" as a whole, slightly inclined to the posterior medial side, and is mainly used to fix the classic entire medial plateau fracture.

Description of drawings

Accompanying drawing 1 is a schematic diagram of a proximal tibial bone plate system of the present invention.

Accompanying drawing 2 is a schematic diagram of the structure of the outer surface of the anterolateral bone plate in a proximal tibial bone plate system of the present invention.

Accompanying drawing 3 is a schematic diagram of the structure of the medial surface of the anterolateral bone plate.

Accompanying drawing 4 is the structural diagram of the connection state of the anterolateral bone plate and the tibia.

Accompanying drawing 5 is a schematic diagram of the lateral structure of the posterolateral bone plate in a proximal tibial bone plate system of the present invention.

Accompanying drawing 6 is a schematic diagram of the structure of the medial side of the posterolateral bone plate.

Accompanying drawing 7 is the structural diagram of the connection state of the posterolateral bone plate and the tibia.

Accompanying drawing 8 is a schematic diagram of the lateral structure of the posteromedial bone plate in a proximal tibial bone plate system of the present invention.

Accompanying drawing 9 is a schematic diagram of the structure of the medial side of the posteromedial bone plate.

Accompanying drawing 10 is the structure schematic diagram of posteromedial bone plate in use state.

Accompanying drawing 11 is a schematic diagram of the structure of the medial side of the medial bone plate.

Accompanying drawing 12 is the structural diagram of medial bone plate.

detailed description

The specific embodiment provided by the utility model will be described in detail below in conjunction with the accompanying drawings.

The reference signs and components involved in the accompanying drawings are as follows:

1. Anterolateral bone plate 11. Proximal head

111. First side 112. Second side

12. Curved surface connection part 13. Distal straight part

14. Locking screw hole 15. Slide hole

6. Fibula 17. Kirschner holes

18. Screws 19. Fan-shaped concave arc surface

2. Posterolateral bone plate 21. Proximal curved plate

22. Distal Curved Plate 3. Posteromedial Bone Plate

31. Transverse section 32. Transition section

33. Longitudinal section 4. Medial bone plate,

41. Head section 42. Slope section

43. Tail segment 5. Tibia

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a proximal tibial bone plate system of the present invention. A bone plate system at the proximal end of the tibia 5, the bone plate system comprising an anterolateral bone plate 1, a posterolateral bone plate 2, a posteromedial bone plate 3, and a medial bone plate 4; the anterolateral bone plate 2, a posterolateral bone plate The materials of the plate 2 , the posteromedial bone plate 3 and the medial bone plate 4 are all titanium alloys.

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of the lateral structure of the anterolateral bone plate in a proximal tibial bone plate system of the present invention. The anterolateral bone plate 1 includes a proximal head 11, a curved connecting portion 12, and a straight distal portion 13; the proximal head 11 includes a first side portion 111 and a second side portion 112; One side 111 is provided with five locking screw holes 14, and the diameter of the locking screw holes 14 is 3.5 mm; the curvature of the edge of the first side 111 and the curved surface connecting portion 12 is larger than that of the second side 112 connected with the curved surface edge curvature of the part 12; the second side part 112 is provided with two locking screw holes 14, and the axial direction of the locking screw holes 14 on the second side part 112 is the same as that of the locking screw on the first side part 111 The axial direction of the hole 14 is 90 degrees; the curved surface connecting portion 12 is also provided with five locking screw holes 14, of which four locking screw holes 14 are adjacent, and the other locking screw hole 14 is located at the remote side of the curved surface connecting portion 12. The three locking screw holes 14 near the proximal head 11 are distributed in a triangle; the edge profile of the proximal head 11 is wave-shaped; the proximal head 11 and the curved surface connecting portion 12 are also provided with Kirschner wire holes 17; the distal straight part 13 is provided with a sliding hole 15 and a locking screw hole 14, wherein the sliding hole 15 is composed of two arc segments and two straight segments.

Please refer to FIG. 3 , which is a schematic diagram of the structure of the medial side of the anterolateral bone plate. The locking screw holes 14 on the anterolateral bone plate 1 are connected with corresponding screws 18, wherein the five screws 18 on the first side 111 are axially consistent, and the screws 18 on the second side 112 are the same as those on the first side 111. The upper screws 18 are axially perpendicular to each other; there are four adjacent screws 18 on the curved surface connecting portion 12, and the axial directions of the four adjacent screws 18 are not parallel, and the screws 18 located on the curved surface connecting portion 12 are adjacent to other adjacent screws. The direction of the four screws 18 is inconsistent; the inner wall of the distal straight surface 13 is provided with a fan-shaped concave arc surface 19, and its fan-shaped concave arc surface 19 is equally spaced on both sides; the distal straight surface The tail end of 13 is a triangle with a circular arc, and a Kirschner wire hole 17 is also provided at the tail end of the triangle.

It should be noted that: as shown in FIG. 4 , FIG. 4 is a schematic structural diagram of the connection state of the anterolateral bone plate and the tibia. The anterolateral bone plate is located on the anterolateral side of the tibia 5 platform, wherein the first side 111 on the anterolateral plate is close to the fibula 6, and the second side 112 is away from the fibula 6; the anterolateral bone plate 1 presents a "T shape" as a whole, The proximal end utilizes the space above the 6th head of the fibula, which can fix most anterolateral fractures or even posterolateral fractures;

The first side part 111 is provided with five 3.5mm locking screw holes 14, adopting the nail row technology, which is more secure than the existing bone plate for fixing the fracture fragment; the second side part 112 is provided with two locking screw holes 14, which lock The assembled screws 18 in the screw holes 14 and the assembled screws 18 on the first side 111 are distributed at 90 degrees, and the two screws 18 on the second side 112 can be interlocked with the screws 18 on the first side 111 from front to back Fix the anterolateral fracture fragment, and can be used to fix the posterolateral fracture fragment; the design of the curved surface connection part 12 conforms to the structural design of the tibia 5, and the shape of the anterolateral bone plate 1 and the tibia 5 bone surface can be fixed accurately through the curved surface connection part 12, The comfort is good, and five locking screw holes 14 are provided on the curved surface connecting part 12. After the corresponding screws 18 are installed, on the one hand, the anterolateral bone plate 1 can be fixed, and on the other hand, the curved surface connecting part 12 can be connected with the Tibia 5 good fit;

Five screws 18 can be installed on the first side 111, two screws 18 can be installed on the second side 112, and five screws 18 are installed on the curved surface connecting portion 12, so that the number of screws 18 on the condyle is sufficient and the holding force is stable;

There is a sliding hole 15 on the straight part 13 of the distal end. After the corresponding screw 18 is assembled in the sliding hole 15, the anterolateral steel plate can move slightly on it, which is beneficial to the installation and adjustment of the anterolateral bone plate 1; in addition, the distal end The locking screw holes 14 on the straight face 13 are equally spaced, and after the corresponding screws 18 are installed, the axes of the screws 18 are parallel to each other, and the fixing reliability is good;

The edge of the proximal head 11 on the anterolateral steel plate is wavy, and its trough facilitates the fixing of the hollow nail. The inner wall of the anterolateral bone plate 1 is also provided with a fan-shaped concave arc surface 19, so that the anterolateral steel plate There is a circulation channel between the tibia 5 to avoid poor blood transport and other complications.

Please refer to FIG. 5 . FIG. 5 is a schematic structural diagram of the lateral surface of the posterolateral bone plate 2 in the proximal tibial bone plate system of the present invention. The posterolateral bone plate 2 includes a proximal curved plate 21 and a distal curved plate 22; the connection between the distal curved plate 22 and the proximal curved plate 21 is an inclined structural form, and the axial direction and the axial direction of the distal curved plate 22 are The axial angle of the proximal curved plate 21 is 66°; the proximal curved plate 21 is provided with four locking screw holes 14, and the diameter of the locking screw holes 14 is 2.7mm; the distal curved plate 22 The length is less than 5cm, and the distal curved plate 22 is provided with four locking screw holes 14, and the diameter of the locking screw holes 14 is 3.5mm.

Please refer to FIG. 6 , which is a schematic diagram of the structure of the medial side of the posterolateral bone plate. Screws 18 are installed in the locking screw holes 14 of the proximal curved panel 21, and the axial directions of the screws 18 are parallel to each other; screws 18 are installed in the locking screw holes 14 provided on the distal curved panel 22. The screw 18 is axially non-parallel; the two ends of the proximal curved plate 21 are concave toward the middle; the two ends of the distal curved plate 22 are convex toward the center;

It should be noted that: please refer to FIG. 7 , which is a schematic structural diagram of the connection state between the posterolateral bone plate and the tibia. The posterolateral bone plate 2 is used to fix the posterolateral fracture fragment, and is in the shape of an "oblique T" as a whole, which can effectively avoid the shielding of the fibula 6 and facilitate exposure during the operation; the proximal curved plate 21 fixes the upper part of the fibula 6 The axial angle between the axial direction of the distal curved plate 22 and the proximal curved plate 21 is 66°, which utilizes the space above the head of the fibula 6; the distal curved plate 22 is inclined to the proximal curved plate 21, The length of the distal curved panel is less than 5 cm, avoiding the blocking of the fibular head and the posterolateral complex, anterior tibial artery and other important anatomical structures; the two ends of the proximal curved panel 21 are concave in the center, and the two ends of the distal curved panel 22 The design convex toward the center coincides with the posterolateral curved surface of the tibia 5, so that the posterolateral bone plate 2 is fixed accurately;

Through the individually designed posterolateral bone plate 2, it is fixed from the posterolateral approach. Compared with the prior art, which adopts the conventional bone plate to fix the posterolateral side of the tibia 5 platform through the anterolateral approach, the posterolateral bone plate of the utility model Plate 2 can well expose, reduce and fix the fracture.

Please refer to FIG. 8 . FIG. 8 is a schematic diagram of the lateral structure of the posteromedial bone plate 3 in the proximal tibial bone plate system of the present invention. The posteromedial bone plate 3 includes a transverse section 31, a transition section 32, and a longitudinal section 33; the transverse section 31 is provided with three locking screw holes 14; the longitudinal section 33 is provided with five locking screw holes 14; The above-mentioned transition section 32 is a curved surface structure, and a locking screw hole 14 and a sliding hole 15 are provided on the transition section 32 .

Please refer to FIG. 9 , which is a schematic diagram of the structure of the medial side of the posteromedial bone plate. Screws 18 are installed in the locking screw holes 14 of the transverse section 31, and the axial directions of the screws 18 are parallel to each other; screws 18 are installed in the locking screw holes 14 of the longitudinal section 33, and the axial directions of the screws 18 are parallel; The inner wall of the longitudinal section 33 is provided with a fan-shaped concave arc surface 19 .

It should be noted that: please refer to FIG. 10 , which is a schematic diagram of the structure of the posteromedial bone plate in use. The posteromedial bone plate 3 is located on the posteromedial side of the tibia 5, and the posteromedial bone plate 3 is in the shape of a "T" as a whole. Fix the fracture fragment and keep the tibial 5 platform flat, completely obedient to the shape of the posterior condyle.

Please refer to FIG. 11 , which is a schematic diagram of the structure of the medial side of the medial bone plate. The medial bone plate 4 includes a slope section 42, a tail section 43, and a head section 41; the tail section 43 is provided with six locking screw holes 14; the head section 41 is provided with four locking screw holes 14 , the diameter of the locking screw hole 14 is 3.5mm, the head section 41 is a curved surface structure, and the edge of the head section 41 is wave-shaped; the slope section 42 is provided with two locking screw holes 14; Both the section 41 and the slope section 42 are provided with a Kirschner wire hole 17 and a locking screw hole 14 ; the tail section 43 is provided with a locking screw hole 14 and a sliding hole 15 .

The locking screw hole 14 of the head section 41 is equipped with a screw 18, and the screw 18 is axially consistent; the locking screw hole 14 of the tail section 43 is equipped with a screw 18, and the screw 18 is axially consistent; the tail section The inner surface of 43 is provided with a fan-shaped concave arc surface 19 .

It should be noted that: please refer to FIG. 12 , which is a schematic diagram of the structure of the medial bone plate. The medial bone plate 4 is generally "T-shaped" and slightly biased posteriorly and medially, and is mainly used to fix the classic entire medial plateau fracture, so that the fracture articular surface of the tibial plateau 5 can achieve anatomical reduction.

A bone plate system for the proximal end of the tibia of the utility model designs special bone plates for different orientations of the tibial plateau. On the basis of anatomical measurement results, the shape, angle and fixed length are determined in advance to ensure a reasonable distribution of screws 18 and In the direction of screw insertion, make full use of the fixation space of the tibia 5 platform and the structural shape of the tibia 5, so that the bone plate corresponding to the tibia 5 platform can be fixed accurately and the fixation effect is good, so that the fracture articular surface of the tibia 5 platform can achieve anatomical reduction; anterolateral The bone plate 1 presents a "T shape" as a whole, and the proximal end utilizes the space above the head of the fibula 6, which can fix most anterolateral fractures or even posterolateral fractures; the first side 111 of the anterolateral bone plate 1 is provided with five 3.5mm The locking screw holes 14 of the bone plate 1 adopt the nail row technology, which is more reliable than the existing bone plate to fix the fracture fragment; the second side 112 of the anterolateral bone plate 1 is provided with two locking screw holes 14, and the locking screw holes 14 are assembled Good screws 18 and the screws 18 assembled on the first side 111 are distributed at 90 degrees, and the two screws 18 on the second side 112 can interlock with the screws 18 on the first side 111 from front to back to fix the anterolateral fracture fragment , and can be used to fix the posterolateral fracture fragment; the posterolateral bone plate 2 is in the shape of "oblique T" as a whole, which can effectively avoid the shielding of the fibula 6, and it is easier to expose during the operation; the proximal curved plate 21 of the posterolateral bone plate 2 fixes the fibula Above the 6th head, the space above the 6th head of the fibula is utilized; the distal curved plate 22 of the posterolateral bone plate 2 is inclined to the proximal curved plate 21, and the length of the distal curved plate is less than 5 cm, avoiding the blocking of the fibula head and the posterolateral complex, anterior tibial artery and other important anatomical structures; the posteromedial bone plate 3 is in the shape of a "T" as a whole, and its transverse section 31 and transition section 32 are designed according to the contour shape of the posteromedial platform of the tibia 5, so as to fix the fracture block and The platform of the tibia 5 is kept flat and fully conforms to the shape of the posterior condyle; the medial bone plate 4 is generally "T-shaped", slightly biased toward the posterior medial side, and is mainly used to fix the classic fracture of the entire medial platform.

It should be noted that: the length of the vertical part of the anterolateral bone plate 1, the posterolateral bone plate 2, the posteromedial bone plate 3, and the medial bone plate 4 and the number of screw holes can be selected according to the patient's fracture situation. Not only limited to the above-mentioned embodiments, the above-mentioned embodiments are only preferred embodiments. The bone plates of different lengths and the number of screws are all within the protection scope of the present invention.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the premise of the utility model method, some improvements and supplements can also be made, and these improvements and supplements also It should be regarded as the protection scope of the present utility model.

Claims (7)

1. a proximal tibia bone plate system, it is characterised in that described bone plate system includes outer side steel plates, rear outside blade plate, afterwards inner side blade plate, inner side blade plate；

Outer side steel plates entirety presents " T-shaped ", and described outer side steel plates includes proximal head, curved surface connecting portion, far-end straight parts；Described proximal head includes the first sidepiece and the second sidepiece；The first described sidepiece is provided with five screw hole, and the diameter of its screw hole is 3.5mm；The second described sidepiece is provided with two screw hole, and the axial of the screw hole on the axial direction of the screw hole on its second sidepiece and the first sidepiece is 90 degree；Being additionally provided with five screw hole on described curved surface connecting portion, the edge contour of described proximal head is wave-like, can squeeze into hollow nail at trough place；Described proximal head and curved surface connecting portion are additionally provided with kirschner pin hole；Described far-end straight parts is provided with sliding eye, screw hole；The inwall of described far-end straight parts is provided with in sector concaved circular cambered surface；The tail end of described far-end straight parts is the triangle with circular arc, and triangle tail end is additionally provided with kirschner pin hole；

Rear outside blade plate entirety is " tiltedly T-shaped ", and after described, outside blade plate includes near-end curved slab and curved distal plate；Described curved distal plate and connecting of near-end curved slab are the version of inclination, and axial and near-end curved slab the axial angle of curved distal plate is 66 °；Described near-end curved slab is provided with four screw hole, and its lock screw bore dia is 2.7mm；Described curved distal plate length is less than 5cm, and its curved distal plate is provided with four screw hole, and the diameter of its screw hole is 3.5mm；

Rear inner side blade plate entirety is " T-shaped ", and after described, inner side blade plate includes traversing section, changeover portion, longitudinal section；Described traversing section is provided with three screw hole；Described longitudinal section has five screw hole；Described changeover portion is curved-surface structure, and its changeover portion is provided with a screw hole and a sliding eye；

Inner side blade plate entirety is in " T-shaped ", and described inner side blade plate includes slope section, end segment, head sections；Described end segment is provided with six screw hole；Described head sections is provided with four screw hole, and the diameter of its screw hole is 3.5mm, and described head sections is curved-surface structure, and the edge of its head sections is wave-like；Described slope section is provided with two screw hole；Described head sections and slope section are equipped with kirschner pin hole and screw hole；Described end segment is provided with screw hole and sliding eye。

2. bone plate system according to claim 1, it is characterised in that four screw hole on described outer side steel plates curved surface connecting portion are adjacent, and another screw hole is positioned at the remote end of curved surface connecting portion；Three screw hole distributions triangular in shape near proximal head。

3. bone plate system according to claim 1, it is characterised in that the screw hole on described outer side steel plates is connected to the screw of correspondence；Wherein five screw axials on the first sidepiece are consistent, and the second sidepiece screwing and the first sidepiece screwing are axially mutually perpendicular to。

4. bone plate system according to claim 1, it is characterized in that, described outer side steel plates curved surface connecting portion there are four screws adjacent, and four adjacent screw is axially not parallel, be additionally disposed in the screw of curved surface connecting portion four screws adjacent with other towards inconsistent。

5. bone plate system according to claim 1, it is characterised in that be provided with screw in the screw hole of outside blade plate near-end curved slab after described, being axially parallel to each other of its screw；Being provided with screw in the screw hole set on described curved distal plate, its screw axial is not parallel。

6. bone plate system according to claim 1, it is characterised in that after described, the screw hole of inner side blade plate traversing section is provided with screw, being axially parallel to each other of its screw；Being provided with screw in the screw hole of described longitudinal section, its screw axial is parallel；Described longitudinal section internal face is provided with in sector concaved circular cambered surface。

7. bone plate system according to claim 1, it is characterised in that the screw hole of described inner side blade plate head sections is provided with screw, and its screw axial is consistent；Described end segment screw hole is provided with screw, and its screw axial is consistent；Described end segment medial surface is provided with in sector concaved circular cambered surface。