Orthopedic implant and medical orthopedic system for controlling bone growth

Abstract

An orthopedic implant that can be used to control the growth rate of bones. An opening of the implant for inserting a fixing screw is provided with at least two supporting parts in the longitudinal direction of the opening. After the screw is screwed into the bone through the opening, different sides of the screw are supported respectively to prevent the screw from shifting in the opening in the growth direction of the bone away from the growth plate. The implant can function immediately after implantation, thereby reducing the implant's in-place time, improving the efficiency of epiphyseal blocking, and avoiding the occurrence of secondary joint deformities.

Description

Technical Field

[0001] The present invention relates to a medical orthopedic system, and more particularly to a medical orthopedic system for controlling bone growth. Background Art

[0002] Angulation of the knee (such as genu varum, genu valgum, Blount's disease, etc.) is a common lower limb limb developmental abnormality in children and adolescents. It can be congenital or acquired, and its treatment is a difficult problem in the field of pediatric orthopedics. Angulation of the knee can cause pathological mechanical loads and may lead to early knee osteoarthritis. Therefore, preventive surgical treatment may be required depending on the degree of deformity. Temporary hemiphysial block surgery using implants is an effective treatment for deformity correction. Using this method, the commonly used treatment tool is the "eight" steel plate, which is based on the tension band principle, that is, the internal fixation generates pressure on the implanted side while generating tension on the opposite side to control the bone growth rate on different sides. However, the current "eight" steel plate has a relatively high complication rate and does not fit the unique convex anatomical contours around the epiphyseal plate, which is prone to uneven stress distribution and causes the plate screw to break. Furthermore, it was found during clinical application that the time when the currently used "figure eight" steel plates exert their growth retardant effect when the screws are opened to a certain extent is mainly concentrated in the second half of implantation and correction. That is, after implantation, the "figure eight" steel plates need to be pulled by bone growth to make the two sides of the screws collide with the screw implantation opening on the "figure eight" steel plates. The correction efficiency is low in the initial stage of implantation and the epiphysis blocking effect cannot be exerted. At the same time, "volcano-like deformity" of the tibial plateau may occur during the treatment of proximal tibial hemi-epiphysis block.

[0003] Through research, it is found that the main reason for the above problems is that the "eight" steel plate takes effect late and has low correction efficiency. When applied to the proximal tibia, the steel plate remains for a long time, resulting in changes in the anatomical structure. Therefore, it is hoped to provide an orthopedic system and an orthopedic implant thereof to reduce or eliminate the defects of the prior art. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] In a first aspect, the present invention provides an orthopedic implant that can be used to control the growth rate of bone, comprising a first part, a second part, and a connecting part connecting the first part and the second part, characterized in that the first part comprises a first connecting portion and a first bone mounting portion connected to the connecting portion via the first connecting portion, the second part comprises a second connecting portion and a second bone mounting portion connected to the connecting portion via the second connecting portion, the first connecting portion and the second connecting portion are arranged on both sides of the connecting portion and are respectively connected to the connecting portion; the first bone mounting portion comprises a first free end portion opposite to the first connecting portion and a first opening for inserting a fixing screw; the second bone mounting portion comprises a second free end portion opposite to the second connecting portion and a second opening for inserting a fixing screw; the first bone mounting portion and the second bone mounting portion are respectively installed and fixed to the growth portion by fixing screws inserted into the first opening and the second opening. The first opening comprises a first supporting portion and a second supporting portion arranged in the longitudinal direction of the opening, wherein the first supporting portion is located on a side of the first bone mounting portion close to the bone surface and close to the first free end, and the second supporting portion is located on a side of the first bone mounting portion away from the bone surface and close to the first connecting portion; the second opening comprises a third supporting portion and a fourth supporting portion arranged in the longitudinal direction of the opening, wherein the third supporting portion is located on a side of the second bone mounting portion close to the bone surface and close to the second free end, and the fourth supporting portion is located on a side of the second bone mounting portion away from the bone surface and close to the second connecting portion; after the fixing screw is screwed into the bone through the first opening and the second opening, the first supporting portion and the second supporting portion are supported on different sides of the fixing screw, and the third supporting portion and the fourth supporting portion are supported on different sides of the fixing screw, so as to fix the relative positions of the fixing screw in the first opening and the second opening respectively in the growth direction of the bone away from the growth plate.

[0006] By adopting the above technical solution, the fixing screw is provided with a supporting force by the opening supporting portion of the orthopedic implant when it is screwed into the bone, which can prevent the relative position of the fixing screw in the implant opening from changing under the traction and drag of bone growth, so that the screw can play a role immediately after being inserted, thereby reducing the implant's in-place time and the incidence of complications, and improving the orthopedic efficiency.

[0007] According to another embodiment of the present invention, the orthopedic implant includes a stopper, which can prevent the connecting portion from moving away from the bone surface. The setting of the stopper can prevent the fixing screw from being separated from the support of the support portion, and the stopper cooperates with the support portion to ensure that the relative position of the fixing screw in the opening is fixed; at the same time, during installation, the existence of the stopper can ensure that the folding angle of the first part and the second part is not too large, so as to facilitate the placement of the implant matching the bone surface.

[0008] According to another embodiment of the present invention, one of the first connecting part and the second connecting part includes spaced arms, and the other has a protrusion extending into the arms, and the arm and the protrusion have a channel for the pivot axis of the connecting part to pass through so that the first part and the second part are pivotally connected; the limiting member includes a first stop member arranged on the end between the arms and a second stop member on the end of the protrusion.

[0009] According to another embodiment of the present invention, the connecting part is an elastic member, and the limiting member includes a "V"-shaped elastic sheet arranged on the elastic member, and the "V"-shaped tip of the elastic sheet faces the bone surface. The elastic member facilitates the integrated formation of the implant, has a simple structure, reduces the external interface of the implant, and reduces the incidence of tissue damage.

[0010] According to another embodiment of the present invention, at least one of the first support portion and the second support portion is provided with a pressure buffer zone, which can provide effective support for the screw on the one hand, and can be deformed under pressure on the other hand, thereby preventing the screw from being broken due to excessive force.

[0011] According to another embodiment of the present invention, the longitudinal cross-section of the first opening comprises a first oblique boundary line, wherein the first oblique boundary line is close to the first free end portion; and the first supporting portion is at least partially located on the first oblique boundary line.

[0012] According to another embodiment of the present invention, the longitudinal cross-section of the first opening includes a second oblique boundary line parallel to the first oblique boundary line and an arc-shaped boundary line connected to the second oblique boundary line, wherein the second oblique boundary line is close to the connecting portion; and the second supporting portion is at least partially located on the arc-shaped boundary line.

[0013] In the process of screwing in the screw to fix the implant, the setting of the oblique boundary line can avoid the premature positioning of the implant and the bone surface due to the existence of the thread, prevent the formation of a gap between the implant and the bone surface, and facilitate the fit and fixation of the implant and the bone surface, thereby preventing the screw from shifting in the opening, and further ensuring that the screw can play a therapeutic effect after insertion.

[0014] According to another embodiment of the present invention, a chamfer is provided on a side of the first opening away from the bone surface, and the second supporting portion is at least partially provided at the chamfer.

[0015] Arranging the support portion in the above manner can form a point-type support portion or a linear support portion, which is convenient for forming a pressure buffer zone. On the one hand, it provides effective support for the screw, and on the other hand, the support portion can be deformed under pressure to prevent the screw from breaking due to excessive force.

[0016] According to another embodiment of the present invention, the axial extension lines of the insertion tips of the fixing screws in the first opening and the second opening do not intersect. By setting the openings in this way, the screws can be prevented from intersecting in the bone and affecting the implantation performance.

[0017] According to another embodiment of the present invention, the first opening and the second opening are in an "eight"-shaped structure, with the surface of the orthopedic implant close to the bone surface as the bottom.

[0018] According to another embodiment of the present invention, the fixing screw is arranged perpendicularly to the side surface of the first bone mounting portion close to the bone surface.

[0019] According to another embodiment of the present invention, the radial distance between the first supporting portion and the second supporting portion matches the outer diameter of the fixing screw.

[0020] According to another embodiment of the present invention, at least one of the first supporting portion and the second supporting portion comprises a point-type supporting portion or a line-type supporting portion.

[0021] According to another embodiment of the present invention, the structures in the first opening and the second opening are symmetrically arranged. By arranging the openings in this way, the complexity of implantation can be reduced, and the same orthopedic system can be used to guide the positioning of the guide pin and the screwing in of the screw.

[0022] According to another embodiment of the present invention, the orthopedic implant further comprises a flexible coating. By providing the flexible coating, stress can be released.

[0023] According to another embodiment of the present invention, the first part and the second part are made of polymer materials, and the growth of bones can be controlled by the extension of the polymer materials.

[0024] In the second aspect, the present invention provides a medical orthopedic system, which can install and fix the orthopedic implant to the bone surface, characterized in that the system includes a retaining assembly and a guide unit; the retaining member of the retaining assembly includes a guide portion, one end of which can extend into the first opening or the second opening and match the inner wall of the first opening or the second opening; the guide unit is fixedly arranged on the guide fixing portion of the guide portion, and the guide channel of the guide element can make the guide pin of the guide fixing screw pass through the first opening or the second opening and be positioned on the bone. The matching setting of the guide portion and the opening facilitates the guide pin to reach the target position, thereby realizing the accurate installation and fixation of the screw.

[0025] According to another embodiment of the present invention, a longitudinal cross-sectional shape of a portion of the guide portion inserted into the first opening or the second opening is a parallelogram.

[0026] According to another embodiment of the present invention, the retaining member further comprises a clamping portion, the clamping portion at least partially fits with the first or second free end, so that the wall of the first opening or the second opening is at least partially located in the space between the clamping portion and the guide portion. The provision of the clamping portion can ensure better fixation of the orthopedic system and the implant to prevent accidental displacement.

[0027] According to another embodiment of the present invention, the guide fixing portion is a through channel, and the guide unit is at least partially inserted into the guide fixing portion.

[0028] According to another embodiment of the present invention, a central axis of the guide channel coincides with a central axis of the first opening or the second opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a medical orthopedic system for controlling bone growth according to an embodiment of the present invention.

[0030] Figure 2 for Figure 1 Schematic cross-section of a medical orthopedic system.

[0031] Figure 3 is a schematic diagram of an orthopedic implant according to an embodiment of the present invention.

[0032] Figure 4 For along Figure 3 A longitudinal cross-sectional view of the orthopedic implant taken along the central axis AA.

[0033] Figure 5 For along Figure 3 Cross-sectional view of the orthopedic implant taken along line BB.

[0034] Figure 6 A partial schematic diagram of a retaining component of a medical orthopedic system.

[0035] Figure 7 This is a schematic diagram of the state of the orthopedic implant after implantation and before correction begins.

[0036] Figure 8 This is a schematic diagram of the state of the orthopedic implant after implantation and correction for a period of time.

[0037] Fig. 9 This is a schematic diagram of an opening for inserting a fixing screw of an orthopedic implant according to another embodiment of the present invention.

[0038] Fig.10 FIG. 1 is a schematic diagram of an orthopedic implant according to another embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0040] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0041] In the description of this embodiment, it should be noted that the terms "on", "inside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "including" and / or "having" used in the specification refer to components, steps, operations, and / or elements, and do not exclude the existence or addition of one or more other components, steps, operations, and / or elements.

[0042] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0043] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Figure 7 , 8The process of using the orthopedic implant of the present invention to treat knee angular deformity is shown. The orthopedic implant is installed on both sides of the growth plate 4 on one side of the bone surface of the bone, including but not limited to the tibia, femur, ulna, radius, spine, etc. After a period of growth and development, the growth of the growth plate 4 on the bone surface on the side where the orthopedic implant is installed is inhibited, while the growth and development of the other side of the bone surface opposite in the radial direction is normal, forming an asymmetric growth of the growth plate to correct the knee angular deformity.

[0046] Furthermore, Figure 3-5 An orthopedic implant 1 of the present invention is shown, and the implant 1 comprises a first part 11, a second part 12, and a connecting part 13 connecting the first part 11 and the second part 12. The connecting part 13 may be a hinge structure, so that the first part 11 and the second part 12 are pivotally connected. Figure 5 As shown, the connecting part 13 includes a pivot shaft 131 and a fixing member 132. The pivot shaft 131 passes through the first connecting portion 112 of the first part 11 and the second connecting portion 122 of the second part 12 and is connected to the fixing member 132. Preferably, the connection is a threaded connection, and the fixing member 132 is a nut. Alternatively, the connecting part 13 can also be an elastic member, which can be made of medical elastic materials such as polyolefins and polyurethanes. Under the action of external force, the first part 11 and the second part 12 can be bent within a specific angle range.

[0047] The first part 11 and the second part 12 both include a bone mounting portion. During the treatment process, the orthopedic implant 1 is fixedly mounted on both sides of the growth plate 4 through the bone mounting portions of the first part 11 and the second part 12. Preferably, at least one of the first part 11 and the second part 12 includes an inclined portion extending from the bone mounting portion at a certain angle. More preferably, the first part 11 and the second part 12 both have an inclined portion extending from the bone mounting portion. When the orthopedic implant 1 is mounted on the bone surface, the inclined portion extends away from the bone surface and is connected to the first connecting portion 112 and / or the second connecting portion 122. Preferably, the first part 11 and the second part 12 are jointly formed with a recess 14 at the connection, and the recess 14 corresponds to the growth plate 4 to provide an angled space for the first part 11 and the second part 12 to prevent the implant 1 from damaging the growth plate 4 during the treatment process and forming complications such as hyperplasia. Preferably, the recess 14 can be formed by the inclined portion, the first connecting portion 112, the second connecting portion 122 and the connecting portion 13.

[0048] Preferably, one of the first connecting portion 112 and the second connecting portion 122 comprises spaced arms, and the other has a protrusion extending between the arms, and the arms and the protrusions have a channel for the pivot shaft 131 to pass through, so as to pivotally connect the first part 11 and the second part 12. Figure 3 , 5, the first connection part 112 includes spaced arms, and the second connection part 122 includes a protrusion extending between the arms. More preferably, the orthopedic implant 1 includes a limiter, which includes a first stopper 113 disposed on the ends between the arms and a second stopper 123 disposed on the ends of the protrusions. When the orthopedic implant 1 is fixedly mounted on both sides of the growth plate 4 through the bone mounting parts of the first part 11 and the second part 12, the first stopper 113 and the second stopper 123 can prevent the connection part 13 from moving away from the bone surface. The first stopper 113 and the second stopper 123 are respectively convex blocks. Alternatively, one of the first stopper and the second stopper is a convex block, and the other is a groove matching the convex block.

[0049] More preferably, the stopper of the orthopedic implant 1 includes a "V"-shaped elastic sheet 133 disposed on the elastic member 13, and the elastic sheet 133 can be made of a polymer material such as PEEK, or a medical material such as stainless steel. The "V"-shaped tip of the elastic sheet 133 faces the bone surface to prevent the connecting part from moving away from the bone surface. Fig.10 .

[0050] See also Figure 3 , 4 , 7, 8, the bone mounting portion includes a first opening 111 located on the first part 11 and a second opening 121 located on the second part 12, and the first opening 111 and the second opening 121 are located on both sides of the growth plate for inserting the fixing screws 5 to fix the orthopedic implant 1 on the bone surfaces on both sides of the growth plate 4. The first opening 111 and the second opening 121 each have at least two supporting portions in the longitudinal direction between the openings. After the screw 5 is screwed into the bone through the openings 111 and 121, different sides of the screw 5 are supported respectively to prevent the screw 5 from shifting in the openings 111 and 121 in the growth direction G of the bone away from the growth plate, so that the implant 1 can function immediately after implantation. Preferably, the radial distance between the supporting portions matches the outer diameter of the screw 5. Compared with implants that can shift in the openings after the screw is implanted, the present invention can function immediately after implantation, thereby reducing the implant in-place time, improving the efficiency of epiphyseal blocking, and avoiding the occurrence of secondary joint deformities. Preferably, the support portion is provided with a pressure buffer zone, so that when the support portion is squeezed under the pulling force of bone growth on the screw, the pressure buffer zone contacts the screw to prevent the screw from being broken due to excessive pressure. Preferably, the pressure buffer zone is an elastic member, such as an elastic washer, an elastic nest or an elastic material, etc., and can be made of medical elastic materials such as polyolefins and polyurethanes. More preferably, the pressure buffer zone is formed integrally with the opening or assembled with the opening.

[0051] The first opening 111 includes a first supporting portion 1113 and a second supporting portion 1114, wherein the first supporting portion 1113 is located on a side of the bone mounting portion close to the bone surface and close to the free end of the first portion, and the second supporting portion 1114 is located on a side of the bone mounting portion away from the bone surface and close to the connecting portion 13 opposite to the free end. The second opening 121 includes a third supporting portion 1213 and a fourth supporting portion 1214, wherein the third supporting portion 1213 is located on a side of the bone mounting portion close to the bone surface and close to the free end of the second portion, and the fourth supporting portion 1214 is located on a side of the bone mounting portion away from the bone surface and close to the connecting portion 13 opposite to the free end of the second portion. After the screw 5 is screwed into the bone through the openings 111 and 121, the first support portion 1113 and the second support portion 1114 are respectively substantially in contact with different sides of the screw 5 in the opening 111, and the third support portion 1213 and the fourth support portion 1214 are respectively substantially in contact with different sides of the screw 5 in the opening 121, so as to fix the relative position of the screw 5 in the opening in the growth direction G of the bone away from the growth plate. Preferably, the axial extension lines of the insertion tips of the screws 5 in the openings 111 and 121 do not intersect. Preferably, the central axis Y of the openings 111 and 121 coincides with the central axis of the screw 5. More preferably, the screw 5 is arranged perpendicularly to the side of the bone mounting portion close to the bone surface.

[0052] In one embodiment of the present invention, Figure 4 As shown, the longitudinal cross-sections of the first opening 111 and the second opening 121 both include parallel oblique boundary lines, wherein the oblique boundary line 1111 of the first opening 111 close to the connecting portion 13 is parallel to the oblique boundary line 1112 close to the free end; the oblique boundary line 1211 of the second opening 121 close to the connecting portion 13 is parallel to the oblique boundary line 1212 close to the free end. Preferably, the first supporting portion 1113 is at least partially located on the oblique boundary line 1112, and the third supporting portion 1213 is at least partially located on the oblique boundary line 1212. Preferably, the arcuate boundary line is connected to the oblique boundary line, wherein the second supporting portion 1114 and the fourth supporting portion 1214 are at least partially arranged on the arcuate boundary line. Preferably, with the surface of the implant 1 close to the bone surface as the bottom, the first opening 111 and the second opening 121 form an inverted "eight" shape. More preferably, in order to facilitate the insertion of the guide screw 5, the first opening 111 and the second opening 121 can be chamfered on the side away from the bone surface, and at the same time, it is convenient to accommodate the head of the screw 5 to prevent the head from protruding outside the bone mounting portion and causing tissue damage. The second support portion 1114' and the fourth support portion 1214' can be at least partially arranged at the chamfer, such as Figure 7 , 8 shown.

[0053] In another embodiment of the present invention, Fig. 9As shown, the longitudinal cross-sections of the first opening 111″ and the second opening 121″ both include a vertical boundary line and an oblique boundary line perpendicular to the bone surface, wherein the second support portion 1114″ and the fourth support portion 1214″ may be at least partially disposed on the vertical boundary line, the first support portion 1113″ and the third support portion 1213″ may be at least partially disposed on the oblique boundary line, and the screw 5 is disposed perpendicularly to the bone mounting portion. The first support portion 1113″ and the third support portion 1213″ are located on a side of the bone mounting portion close to the bone surface and close to the free end of the bone mounting portion, and the second support portion 1114″ and the fourth support portion 1214″ are located on a side of the bone mounting portion away from the bone surface and close to the connecting portion 13 opposite to the free end.

[0054] In other embodiments of the present invention, the first opening and the second opening may have different central longitudinal cross-sectional shapes, as long as there are at least two supporting portions in the longitudinal direction between the openings to respectively support different sides of the screw after the screw is screwed into the bone through the opening, so as to prevent the screw from shifting in the opening in the growth direction G of the bone away from the growth plate, so that the implant can function after implantation.

[0055] More preferably, the supporting portion of each opening includes at least one point-type supporting portion or a linear supporting portion to provide force buffering for the screw and prevent the screw from being compressed and broken under the pulling effect of bone growth.

[0056] More preferably, the supporting parts of each opening are not simultaneously arranged on longitudinal parallel boundary lines of the rectangular boundary lines of the longitudinal cross-section of the opening, so as to prevent the screw from being compressed and broken under the pulling effect of bone growth.

[0057] The implant 1 is made of biocompatible materials, such as surgical stainless steel, titanium or a combination thereof, and / or polymer materials such as ceramics and PEEK. The first part 11 and the second part 12 of the implant 1 are preferably made of polymer materials such as PEEK, and the connecting part 13 is preferably made of metal, which can control the growth of bones through the extension of the polymer material.

[0058] See also Figure 1 , 26. The present invention provides a preferred medical orthopedic system capable of installing and fixing an orthopedic implant 1 to a bone surface, the system comprising a retaining assembly 3, the retaining assembly 3 comprising a retaining member 31, an extension member 32, and a handle 33, wherein the handle 33 is connected to the retaining member 31 through the extension member 32. The retaining member 31 comprises a clamping portion 311 and a guide portion 312, one end of the guide portion 312 being able to extend into the first opening or the second opening of the orthopedic implant 1 and match the inner wall of the first opening or the second opening. Preferably, the longitudinal cross-sectional shape of the portion of the guide portion 312 inserted into the first opening or the second opening is a parallelogram. More preferably, the longitudinal height of the portion is less than or equal to the longitudinal height of the first opening or the second opening. The clamping portion 311 is at least partially fitted to the free end portion, so that the wall portion of the first opening or the second opening is at least partially located in the space between the clamping portion 311 and the guide portion 312, so as to form a clamping fixation for the orthopedic implant 1. Preferably, the radial dimension of the space is equal to or smaller than the thickness of the wall portion located in the space to form an interference fit.

[0059] The system also includes a series of guide units 2 to guide the guide pin to be positioned on the bone. The guide channel 21 of the guide unit 2 is adapted to guide pins of different models, and the guide pins are adapted to fixing screws of different models. Preferably, the fixing screw has a through channel for inserting the guide pin inside, so that the fixing screw can be screwed into the bone along the guide pin. The guide unit 2 is fixedly arranged on the guide fixing portion 3121 of the guide portion 312, and the guide fixing portion 3121 is a through channel. The guide unit 2 is at least partially inserted into the guide fixing portion 3121, and the end face of the guide fixing portion 3121 is abutted by the limit stop portion 22 to prevent the guide unit 2 from being inserted into the outside of the guide fixing portion 3121 and damaging the bone surface. Alternatively, the guide fixing portion 3121 is not limited to a through channel, and it is sufficient that the central axis of the guide channel 21 coincides with the central axis of the first opening or the second opening, so that the guide pin can be fixedly positioned perpendicular to the bone surface, thereby enabling the fixing screw to be screwed into the bone perpendicular to the bone surface to fix the implant 1 to the bone surface. For example, the guide fixing portion 3121 can be fixedly connected to the guide unit 2 by a snap-fit.

[0060] In the specific operation process, the orthopedic implant 1 is first clamped and fixed to the retaining member 31, and one end of the guide portion 312 extends into the first opening or the second opening of the orthopedic implant 1 to establish an insertion channel for the guide unit 2; the guide unit 2 is fixed to the guide fixing portion 3121 of the retaining member 31, so that the guide channel 21 of the guide unit 2 coincides with the central axis of the first opening or the second opening; the guide needle is inserted into the guide channel 21 for fixed positioning; the guide unit 2 and the retaining assembly 3 are removed; the guide needle is inserted into the through channel of the fixing screw, and the guiding fixing screw is screwed into the bone through the first opening or the second opening. At this time, the central axis of the fixing screw coincides with the central axis of the first opening or the second opening, the fixing screw is vertically arranged to the bone mounting portion, the first and second supporting portions are located on both sides of the fixing screw or the third and fourth supporting portions are located on both sides of the fixing screw to support the fixing screw, and the relative position of the fixing screw in the opening is fixed in the growth direction G of the bone away from the growth plate, see Figure 7 , 8 During the entire treatment process, due to the role of the supporting part, the fixing screw and the bone mounting part are always in a relatively vertical state, ensuring that the fixing screw can play a role immediately after insertion, reducing the implant's in-place time, improving correction efficiency, and reducing complications caused by the implant.

[0061] Alternatively, the guiding direction of the guide fixing portion and / or the guide channel may be set according to the fixing direction of the fixing screw.

[0062] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An orthopedic implant capable of controlling bone growth rate, comprising a first portion, a second portion and a connecting portion connecting the first portion and the second portion, characterized in that: The first part includes a first connecting portion and a first bone mounting portion connected to the connecting portion through the first connecting portion, the second part includes a second connecting portion and a second bone mounting portion connected to the connecting portion through the second connecting portion, the first connecting portion and the second connecting portion are arranged on both sides of the connecting portion and are respectively connected to the connecting portion; The first bone mounting portion includes a first free end portion opposite to the first connecting portion and a first opening for inserting a fixing screw; The second bone mounting portion includes a second free end portion opposite to the second connecting portion and a second opening for inserting a fixing screw; The first bone mounting portion and the second bone mounting portion are respectively installed and fixed to the two sides of the growth plate by fixing screws inserted into the first opening and the second opening; The first opening includes a first supporting portion and a second supporting portion arranged in the longitudinal direction of the opening, wherein the first supporting portion is located on a side of the first bone mounting portion close to the bone surface and close to the first free end, and the second supporting portion is located on a side of the first bone mounting portion away from the bone surface and close to the first connecting portion; The second opening includes a third supporting portion and a fourth supporting portion arranged in the longitudinal direction of the opening, wherein the third supporting portion is located on a side of the second bone mounting portion close to the bone surface and close to the second free end, and the fourth supporting portion is located on a side of the second bone mounting portion away from the bone surface and close to the second connecting portion; After the fixing screw is screwed into the bone through the first opening and the second opening, the first supporting portion and the second supporting portion are supported on different sides of the fixing screw, and the third supporting portion and the fourth supporting portion are supported on different sides of the fixing screw, so as to fix the relative positions of the fixing screw in the first opening and the second opening respectively in the growth direction of the bone away from the growth plate.

2. The orthopedic implant according to claim 1, characterized in that The orthopedic implant includes a stopper capable of preventing the connecting portion from moving away from a bone surface.

3. The orthopedic implant according to claim 2, characterized in that One of the first connecting part and the second connecting part includes spaced arms, and the other has a protrusion extending into the arms, and the arms and the protrusion have a channel for the pivot axis of the connecting part to pass through so that the first part and the second part are pivotally connected; the limiting member includes a first stop member arranged on the end between the arms and a second stop member on the end of the protrusion.

4. The orthopedic implant according to claim 2, characterized in that The connecting part is an elastic member, and the limiting member includes a "V"-shaped elastic sheet arranged on the elastic member, and the "V"-shaped tip of the elastic sheet faces the bone surface.

5. The orthopedic implant according to claim 1, characterized in that At least one of the first supporting portion and the second supporting portion is provided with a pressure buffer zone.

6. The orthopedic implant according to claim 1, wherein The longitudinal cross-section of the first opening comprises a first oblique boundary line, wherein the first oblique boundary line is close to the first free end portion; and the first supporting portion is at least partially located on the first oblique boundary line.

7. The orthopedic implant according to claim 6, characterized in that The longitudinal cross-section of the first opening includes a second oblique boundary line parallel to the first oblique boundary line and an arcuate boundary line connected to the second oblique boundary line, wherein the second oblique boundary line is close to the connecting portion; and the second supporting portion is at least partially located on the arcuate boundary line.

8. The orthopedic implant according to any one of claims 1 to 7, characterized in that The first opening is provided with a chamfer at a side away from the bone surface, and the second supporting portion is at least partially provided at the chamfer.

9. The orthopedic implant according to any one of claims 1 to 7, characterized in that The axial extension line of the insertion tip of the fixing screw in the first opening does not intersect with the second opening.

10. The orthopedic implant according to any one of claims 1 to 7, characterized in that With the surface of the orthopedic implant close to the bone surface as the bottom, the first opening and the second opening are in an "eight"-shaped structure.

11. The orthopedic implant according to any one of claims 1 to 7, characterized in that The fixing screw is arranged perpendicularly to the side surface of the first bone mounting portion close to the bone surface.

12. The orthopedic implant according to any one of claims 1 to 7, characterized in that The radial distance between the first supporting portion and the second supporting portion matches the outer diameter of the fixing screw.

13. The orthopedic implant according to any one of claims 1 to 7, characterized in that At least one of the first supporting portion and the second supporting portion includes a point-type supporting portion or a line-type supporting portion.

14. The orthopedic implant according to any one of claims 1 to 7, characterized in that The structures in the first opening and the second opening are symmetrically arranged.

15. The orthopedic implant according to any one of claims 1 to 7, characterized in that The first part and the second part are made of polymer materials.

16. A medical orthopedic system, capable of installing and fixing the orthopedic implant according to any one of claims 1 to 15 to a bone surface, characterized in that: The system includes a holding assembly and a guide unit; The retaining member of the retaining assembly includes a guide portion, one end of which can extend into the first opening or the second opening and match with the inner wall of the first opening or the second opening; The guide unit is fixedly arranged on the guide fixing portion of the guide part, and a guide pin of a guide fixing screw can be passed through the first opening or the second opening and positioned on the bone through the guide channel of the guide unit.

17. The medical orthopedic system according to claim 16, wherein: A longitudinal cross-sectional shape of a portion of the guide portion inserted into the first opening or the second opening is a parallelogram.

18. The medical orthopedic system according to claim 16 or 17, characterized in that: The retaining member further comprises a clamping portion, which is at least partially fitted with the first or second free end, so that the wall of the first opening or the second opening is at least partially located in the space between the clamping portion and the guide portion.

19. The medical orthopedic system according to claim 16 or 17, characterized in that: The guide fixing portion is a through channel, and the guide unit is at least partially inserted into the guide fixing portion.

20. The medical orthopedic system according to claim 16 or 17, characterized in that: The central axis of the guide channel coincides with the central axis of the first opening or the second opening.

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