CN214342545U - Orthopedic implant for controlling bone growth and medical orthopedic system - Google Patents

Abstract

An orthopedic implant and a medical orthopedic system usable for controlling a bone growth rate, the implant comprising a first portion, a second portion, and a connecting portion connecting the first portion and the second portion, the first portion including a first connecting portion and a first bone mounting portion connected to the connecting portion by the first connecting portion, the second portion including a second connecting portion and a second bone mounting portion connected to the connecting portion by the second connecting portion, the first connecting portion and the second connecting portion being disposed on both sides of the connecting portion and connected to the connecting portion, respectively; the opening of the implant for inserting the fixing screw is provided with at least two supporting parts in the longitudinal direction of the opening, and after the screw is screwed into the bone through the opening, different side surfaces of the screw are respectively supported so as to prevent the screw from shifting in the opening in the growth direction of the bone away from the growth plate, so that the implant can play a role after being implanted, the in-place time of the implant is reduced, the epiphysis blocking efficiency is improved, and the occurrence of secondary joint deformity is avoided.

Description

Orthopedic implant for controlling bone growth and medical orthopedic system

Technical Field

The present invention relates to medical orthopedic systems, and more particularly to medical orthopedic systems for controlling bone growth.

Background

Knee joint angulation deformity (such as genu varum, genu valgus, mount disease and the like) is common lower limb abnormal development of children and teenagers, can be congenital or acquired, and is a problem which is relatively troublesome in the field of children orthopedics. Knee angulation deformities can result in pathological mechanical loads, possibly leading to early knee osteoarthritis. Thus, depending on the degree of deformity, prophylactic surgical treatment may be required. Temporary hemiepiphyseal block surgery using endophytes is an effective treatment for deformity correction. By adopting the method, a commonly used treatment tool is a steel plate in the shape of a Chinese character 'ba', which is based on the principle of a tension belt, namely, the steel plate is internally fixed at the implantation side to generate pressure and simultaneously generates tension at the opposite side to control the bone growth speed of different sides. However, the incidence rate of complications of the currently used steel plate shaped like the Chinese character 'ba' is relatively high, the complications do not conform to the specific protruding anatomical contour around the epiphyseal plate, and uneven stress distribution is easy to occur, so that the steel plate screw is broken. In addition, in the clinical application process, the time that the currently used splayed steel plate plays a growth retardation role to a certain extent when the screw is opened is mainly concentrated in the second half of the implantation correction, namely the splayed steel plate needs to be subjected to the traction of bone growth after being implanted to enable the two sides of the screw to be offset with the screw implantation opening on the splayed steel plate, the correction efficiency at the initial implantation stage is low, and the epiphysis retardation effect cannot be played; meanwhile, volcano-like deformity of the tibial plateau can occur during the treatment of proximal tibial hemiepiphyseal block.

Research shows that the main reasons of the problems are that the steel plate with the shape like the Chinese character 'ba' has late onset time and low orthopedic efficiency, and when the steel plate is applied to the proximal end of the tibia, the steel plate is left for a long time to cause the change of an anatomical structure. Accordingly, it is desirable to provide an orthopedic system and orthopedic implant therefor that reduce or eliminate the disadvantages of the prior art.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

In a first aspect, the present invention provides an orthopedic implant usable for controlling bone growth rate, comprising a first portion, a second portion and a connecting portion connecting the first portion and the second portion, wherein the first portion comprises a first connecting portion and a first bone mounting portion connected to the connecting portion through the first connecting portion, the second portion comprises 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 disposed 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 opposite the first connection portion and a first opening for insertion of a set screw; the second bone mounting portion includes a second free end portion opposite the second connecting portion and a second opening into which a set screw is inserted; the first bone mounting part and the second bone mounting part are used for mounting and fixing the first part and the second part on two sides of a growth plate through fixing screws inserted into the first opening and the second opening respectively; the first opening comprises a first supporting part and a second supporting part which are arranged in the longitudinal direction of the opening, wherein the first supporting part is positioned on one side, close to the bone surface, of the first bone mounting part and close to the first free end part, and the second supporting part is positioned on one side, far away from the bone surface, of the first bone mounting part and close to the first connecting part; the second opening comprises a third supporting part and a fourth supporting part which are arranged in the longitudinal direction of the opening, wherein the third supporting part is positioned on one side, close to the bone surface, of the second bone mounting part and close to the second free end part, and the fourth supporting part is positioned on one side, far away from the bone surface, of the second bone mounting part and close to the second connecting part; after the fixing screw is screwed into the bone through the first opening and the second opening, the first supporting part and the second supporting part are supported on different sides of the fixing screw, and the third supporting part and the fourth supporting part are supported on different sides of the fixing screw, so that the fixing screw is fixed in relative positions in the first opening and the second opening respectively in the growth direction of the bone away from the growth plate.

By adopting the technical scheme, the fixing screw is subjected to the supporting force provided by the opening supporting part of the orthopedic implant when being screwed into the bone, so that the relative position of the fixing screw in the opening of the implant can be prevented from changing under the traction and the drag of the bone growth, the screw can play a role after being placed, the in-place time and the incidence rate of complications of the implant are reduced, and the orthopedic efficiency is improved.

In accordance with another embodiment of the present invention, the orthopedic implant includes a stop that prevents the connecting portion from moving away from the facet. The limiting piece is arranged to prevent the fixing screw from being separated from the support of the support part, and the limiting piece is matched with the support part to ensure that the relative position of the fixing screw in the opening is fixed; meanwhile, when the implant is installed, the existence of the limiting part can ensure that the folding angle of the first part and the second part is not too large, and the implant can be conveniently placed in a manner of being matched with the bone surface.

According to another embodiment of the invention, one of the first and second connection portions comprises spaced apart arms, the other having a protrusion extending between the arms, the arms and the protrusion having a channel through which a pivot axis of the connection portion passes for pivotally connecting the first and second portions; the stop includes a first stop disposed on an end between the arms and a second stop on an end of the projection.

According to the utility model discloses a further embodiment, the connecting portion is the elastic component, the locating part is including setting up "V" type flexure strip on the elastic component, the "V" type pointed end of flexure strip is towards the bone surface. The elastic piece is convenient for the implant integral type to form, and simple structure has reduced the external interface of implant, has reduced the incidence of tissue damage.

According to another embodiment of the invention, at least one of the first and second support parts is provided with a pressure buffer zone. The pressure buffer zone is arranged to provide effective support for the screw on one hand, and on the other hand, the pressure buffer zone can be deformed under pressure, so that the screw can be prevented from being broken due to overlarge stress.

According to another embodiment of the 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; the first support portion is at least partially located on the first oblique boundary line.

According to another embodiment of the invention, the longitudinal section of the first opening comprises a second oblique boundary line parallel to the first oblique boundary line, an arc-shaped boundary line connected to the second oblique boundary line, wherein the second oblique boundary line is close to the connection portion; the second support portion is at least partially located on the arcuate boundary line.

In the process of screwing the screw into the implant, the arrangement of the oblique boundary line can avoid the advance positioning between the implant and the bone surface due to the existence of the threads, prevent the generation of a gap between the implant and the bone surface, and is beneficial to the attachment and fixation of the implant and the bone surface, thereby preventing the screw from shifting at the opening and further ensuring that the screw can play a role in treatment after being put into the bone.

According to another embodiment of the invention, the first opening is provided with a chamfer at a side remote from the bone surface, and the second support is at least partially provided at the chamfer.

By arranging the supporting part in the above way, a point type supporting part or a linear type supporting part can be formed, so that a pressure buffer area is convenient to form, on one hand, effective supporting is provided for the screw, and on the other hand, the supporting part can be deformed under pressure, and the screw is prevented from being broken due to overlarge stress.

According to another embodiment of the present invention, the first opening does not intersect with an axial extension line of an insertion tip of the fixing screw in the second opening. The opening is arranged in such a way, so that the screws can be prevented from intersecting in the bone and affecting the implantation performance.

According to another embodiment of the present invention, the first opening and the second opening are in a "v" configuration with the surface of the orthopedic implant adjacent to the facet of the bone as the base.

According to another embodiment of the present invention, the fixing screw is vertically provided to a side of the first bone mounting portion adjacent to the bone surface.

According to another embodiment of the invention, the radial distance of the first and second support part matches the outer diameter of the fixing screw.

According to another embodiment of the invention, at least one of the first and second support portions comprises a point-type support portion or a line-type support portion.

According to another embodiment of the present invention, the first opening and the second opening are symmetrically arranged. The opening is arranged in the mode, so that the implantation complexity can be reduced, and the same set of orthopedic system can be adopted for guiding the guide pin positioning and screwing in of the screw.

In accordance with another embodiment of the present invention, the orthopedic implant further comprises a flexible coating. By providing a flexible coating, the stress can be released.

According to another embodiment of the present invention, the first and second portions are made of a polymer material. Bone growth can be controlled by the extension of the polymeric material.

In a second aspect, the present invention provides a medical orthopaedic system capable of mounting and securing the orthopaedic implant to a bone surface, the system comprising a retaining assembly and a guide unit; the holding piece of the holding assembly comprises a guide part, one end of the guide part can extend into the first opening or the second opening and is matched with the inner wall of the first opening or the second opening; the guiding unit is fixedly arranged on the guiding fixing part of the guiding part, and a guiding guide pin for guiding the fixing screw can be positioned on the bone through the first opening or the second opening through the guiding channel of the guiding element. The guide part is matched with the opening, so that the guide pin can be guided to reach a target position conveniently, and the accurate installation and fixation of the screw can be realized.

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

According to another embodiment of the invention, the holder further comprises a clamping portion, which at least partially abuts the first or second free end portion, such that a wall of the first or second opening is at least partially located in a space between the clamping portion and the guide portion. The clamping portion can ensure that the orthopedic system and the implant are better fixed and prevent accidental displacement.

According to another embodiment of the invention, the guide fixing part is a through channel, the guide unit being at least partially inserted into the guide fixing part.

According to another embodiment of the invention, the central axis of the guide channel coincides with the central axis of the first or second opening.

Drawings

Fig. 1 is a schematic view of a medical orthopedic system for controlling bone growth according to an embodiment of the present invention.

Fig. 2 is a cross-sectional schematic view of the medical orthopedic system of fig. 1.

Fig. 3 is a schematic view of an orthopedic implant according to an embodiment of the present invention.

Fig. 4 is a longitudinal cross-sectional view of the orthopedic implant taken along the central axis a-a of fig. 3.

Fig. 5 is a cross-sectional view of the orthopedic implant taken along line B-B of fig. 3.

Fig. 6 is a partial schematic view of a retaining assembly of the medical orthopedic system.

Fig. 7 is a schematic view of the orthopedic implant after implantation and before correction has begun.

Fig. 8 is a schematic view of the orthopedic implant after implantation and after a period of correction.

Fig. 9 is a schematic view of an opening of an orthopedic implant according to another embodiment of the present invention for insertion of a set screw.

Fig. 10 is a schematic view of an orthopedic implant according to another embodiment of the present invention.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "inner" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship which is usually placed when the utility model is used, and are only for convenience of describing the utility model and simplifying the description, but do not indicate or imply that the device or the element which is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the utility model. The use of "including" and/or "having" in the specification means that the component, step, operation and/or element does not preclude the presence or addition of one or more other components, steps, operations and/or elements.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 7 and 8 illustrate the procedure for treating knee angulation deformities using the orthopedic implants of the present invention installed on both sides of growth plate 4 on one facet of a bone, including but not limited to the tibia, femur, ulna, radius, spine, etc. After a period of growth, the growth of the growth plate 4 is inhibited on the side of the bone surface on which the orthopaedic implant is mounted and normal on the opposite side of the bone surface in the radial direction, resulting in asymmetric growth of the growth plate to correct knee angulation.

Further, fig. 3-5 show an orthopedic implant 1 according to the present invention, the implant 1 comprising a first portion 11, a second portion 12, and a connecting portion 13 connecting the first portion 11 and the second portion 12. The connecting portion 13 may be a hinge structure that pivotally connects the first portion 11 and the second portion 12. As shown in fig. 5, the connecting portion 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 portion 11 and the second connecting portion 122 of the second portion 12 to be connected to the fixing member 132, preferably, the connection is a threaded connection, and the fixing member 132 is a nut. Alternatively, the connecting portion 13 may be an elastic member, and the first portion 11 and the second portion 12 may be bent within a specific angle range by an external force.

The first and second portions 11, 12 each include a bone mounting portion, and the orthopaedic implant 1 is fixedly mounted to both sides of the growth plate 4 by the bone mounting portions of the first and second portions 11, 12 during treatment. Preferably, at least one of the first and second portions 11, 12 includes an angled portion extending at an angle from the bone mounting portion, and more preferably, each of the first and second portions 11, 12 has an angled portion extending from the bone mounting portion. When the orthopaedic implant 1 is mounted to a bone surface, the angled portion extends away from the bone surface and connects with the first connection portion 112 and/or the second connection portion 122. Preferably, first portion 11 and second portion 12 together define a recess 14 at the junction, recess 14 corresponding to growth plate 4 to provide an angled space for first portion 11 and second portion 12 to prevent implant 1 from damaging growth plate 4 during treatment, creating complications such as hyperplasia. Preferably, the recess 14 may be formed by the inclined portion, the first connection portion 112, the second connection portion 122, and the connection portion 13 together.

Preferably, one of the first and second connection portions 112, 122 comprises spaced apart arms with a projection extending therebetween, the arms, projection having a channel through which the pivot shaft 131 passes to pivotally connect the first and second portions 11, 12. Referring illustratively to fig. 3 and 5, the first connection portion 112 includes spaced apart arms and the second connection portion 122 includes a projection extending between the arms. Still preferably, the orthopedic implant 1 includes a stop comprising a first stop 113 disposed on the inter-arm end and a second stop 123 on the end of the protrusion, the first stop 113 and the second stop 123 preventing the connecting portion 13 from moving away from the bone surface when the orthopedic implant 1 is fixedly mounted on both sides of the growth plate 4 by the bone mounting portions of the first portion 11 and the second portion 12. The first stopper 113 and the second stopper 123 are respectively a protrusion, alternatively, one of the first stopper and the second stopper is a protrusion, and the other is a groove matched with the protrusion.

Still preferably, the retaining member of the orthopedic implant 1 comprises a "V" shaped elastic sheet 133 disposed on the elastic member 13, and the elastic sheet 133 may be made of stainless steel, polymer material, etc. The "V" shaped tip of the flexible flap 133 faces the facet to prevent the connecting portion from moving away from the facet, see fig. 10 in particular.

Referring to fig. 3, 4, 7, 8, the bone mounting portion includes a first opening 111 on the first portion 11 and a second opening 121 on the second portion 12, the first and second openings 111, 121 being on either side of the growth plate for insertion of a set screw 5 to fixedly mount the orthopedic implant 1 on the bone side on either side of the growth plate 4. The first opening 111 and the second opening 121 each have at least two support portions in the longitudinal direction between the openings, which support different sides of the screw 5 after the screw 5 is screwed into the bone through the openings 111, 121, respectively, to prevent the screw 5 from being displaced in the openings 111, 121 in the growth direction G of the bone away from the growth plate, so that the implant 1 functions after implantation. Preferably, the radial distance between the bearing portions matches the outer diameter of the screw 5. For the implant that can shift in the opening after the screw implantation, the utility model discloses owing to can play a role after implanting, reduce the implant time on the throne, improve epiphysis and block efficiency, avoid secondary articular deformity's emergence. Preferably, the support portion is provided with a pressure buffer area so that when the support portion is pressed by a pulling force of bone growth on the screw, the pressure buffer area is in contact with the screw to prevent the screw from being broken due to an excessive pressure applied thereto. Preferably, the pressure buffer zone is an elastic member, such as an elastic washer, an elastic nest or an elastic material. It is further preferred that the pressure buffer is formed integrally with the opening or assembled with the opening.

The first opening 111 includes a first support portion 1113 and a second support portion 1114, wherein the first support portion 1113 is located on a side of the bone mounting portion proximate to the bone surface and proximate to a free end of the first portion, and the second support portion 1114 is located on a side of the bone mounting portion distal to the bone surface and proximate to the connecting portion 13 opposite the free end. The second opening 121 includes a third support portion 1213 and a fourth support portion 1214, wherein the third support portion 1213 is located on a side of the bone mounting portion proximate the bone surface and proximate the free end of the second portion, and the fourth support portion 1214 is located on a side of the bone mounting portion distal the bone surface and proximate the connecting portion 13 opposite the free end of the second portion. After the screw 5 is screwed into the bone through the openings 111, 121, the first and second supports 1113, 1114 are in substantial contact with different sides of the screw 5 in the opening 111, respectively, and the third and fourth supports 1213, 1214 are in substantial contact with different sides of the screw 5 in the opening 121, respectively, to fix the relative position of the screw 5 in the opening in a growth direction G of the bone away from the growth plate. Preferably, the axial extensions of the insertion tips of the screws 5 in the openings 111, 121 do not intersect. Preferably, the central axis Y of the openings 111, 121 coincides with the central axis of the screw 5. Further preferably, the screw 5 is arranged perpendicular to the side of the bone mounting portion near the bone surface.

In one embodiment of the present invention, as shown in fig. 4, the longitudinal cross-sections of the first opening 111 and the second opening 121 each include parallel oblique boundary lines, wherein the oblique boundary line 1111 of the first opening 111 near the connecting portion 13 is parallel to the oblique boundary line 1112 near the free end portion; the oblique boundary line 1211 of the second opening 121 near the connecting portion 13 is parallel to the oblique boundary line 1212 near the free end. Preferably, the first support portion 1113 is at least partially located on the inclined boundary line 1112, and the third support portion 1213 is at least partially located on the inclined boundary line 1212. Preferably, the arc-shaped boundary line is connected with the oblique boundary line, wherein the second support portion 1114 and the fourth support portion 1214 are at least partially disposed on the arc-shaped boundary line. Preferably, the first opening 111 and the second opening 121 form an inverted "splayed" shape, with the surface of the implant 1 near the facet of the bone as the base. Still preferably, to facilitate the insertion of the guide screw 5, the first opening 111 and the second opening 121 may be chamfered on the side away from the bone surface, while also facilitating the accommodation of the head of the screw 5, preventing it from protruding outside the bone mounting portion, causing tissue damage. The second and fourth support portions 1114 ', 1214' may be at least partially disposed at a chamfer, as shown in fig. 7, 8.

In another embodiment of the present invention, as shown in fig. 9, the longitudinal cross-section of the first opening 111 "and the second opening 121" each 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 perpendicular 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 proximate the bone surface and proximate a 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 distal the bone surface and proximate the connecting portion 13 opposite the free end.

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 at least two supporting portions are longitudinally provided between the openings, so as 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 in which the bone is away from the growth plate, and thus the implant can be used after being implanted.

It is further preferred that the support portion of each opening includes at least one point type support portion or linear type support portion to provide force buffering of the screw and prevent the screw from being broken under compression under the pulling action of bone growth.

It is further preferred that the support portion of each opening is not simultaneously provided on the longitudinal parallel boundary line of the rectangular boundary line of the longitudinal section of the opening, preventing the screw from being broken under compression under the pulling action of bone growth.

The implant 1 is constructed of a biocompatible material, such as a metal, e.g., surgical stainless steel, titanium, or combinations thereof, and/or a polymer material, e.g., ceramic, PEEK, etc. The first and second portions 11 and 12 of the implant 1 are preferably made of a polymer material such as PEEK, and the connecting portion 13 is preferably made of metal, so that the growth of bone can be controlled by the extension of the polymer material.

Referring to fig. 1, 2 and 6, the present invention provides a preferred medical orthopedic system capable of installing and securing 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, the handle 33 being connected to the retaining member 31 via the extension member 32. The holding element 31 comprises a clamping portion 311, a guide portion 312, one end of the guide portion 312 being able to project into the first or second opening of the orthopedic implant 1 and to match the inner wall of the first or second opening. Preferably, the longitudinal sectional shape of the portion of the guide 312 inserted into the first opening or the second opening is a parallelogram. Still 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 fits at least partially at the free end, so that the wall of the first or second opening is at least partially located in the space between the clamping portion 311 and the guide portion 312 to form a clamping fixation of the orthopaedic implant 1. Preferably, the radial dimension of the space is equal to or less than the thickness of the wall portion located in the space to form an interference fit.

The system further comprises a series of guiding units 2 to guide the positioning of the lead on the bone. The guide channel 21 of the guide unit 2 is adapted to different types of guide pins adapted to different types of set screws, preferably having a through channel inside the set screw for insertion of the guide pin, so that the set screw is screwed into the bone along the guide pin. The guide unit 2 is fixedly disposed on the guide fixing portion 3121 of the guide portion 312, 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 limit stopper portion 22 abuts against an end surface of the guide fixing portion 3121, thereby preventing the guide unit 2 from being inserted into an external injured bone surface of the guide fixing portion 3121. Alternatively, the guide fixing portion 3121 is not limited to a through channel as long as 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 is fixedly positioned perpendicular to the bone surface, so that a fixing screw can 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 may be fixedly connected with the guide unit 2 by snapping.

In a specific operation, the orthopedic implant 1 is first fixed to the holding element 31 in a clamping manner, and one end of the guide 312 protrudes into the first opening or the second opening of the orthopedic implant 1, so that an insertion channel of the guide unit 2 is established; fixing the guide unit 2 to the guide fixing portion 3121 of the holder 31 such that the guide passage 21 of the guide unit 2 coincides with the central axis of the first opening or the second opening; the guide pin is inserted into the guide channel 21 for fixed positioning; removing the guide unit 2 and the holding assembly 3; the guide pin is inserted into the through channel of the fixing screw, the fixing screw is guided to be 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 arranged perpendicular to the bone mounting portion, the first support portion and the second support portion are positioned on two sides of the fixing screw or the third support portion and the fourth support portion are positioned on two 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 far away from the growth plate, see fig. 7 and 8. In the whole treatment process, due to the effect of the supporting part, the fixing screw and the bone installation part are always in a state of being vertical to each other, so that the fixing screw can play a role after being placed, the in-place time of the implant is reduced, the orthopedic efficiency is improved, and the complications generated by the implant are reduced.

Alternatively, the guide direction of the guide fixing and/or the guide channel can be set according to the fixing direction of the fixing screw.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (20)

1. An orthopedic implant usable for controlling the rate of bone growth comprising a first portion, a second portion, and a connecting portion connecting said first portion and said second portion,

the first part comprises a first connecting part and a first bone mounting part connected with the connecting part through the first connecting part, the second part comprises a second connecting part and a second bone mounting part connected with the connecting part through the second connecting part, and the first connecting part and the second connecting part are arranged on two sides of the connecting part and are respectively connected with the connecting part;

the first bone mounting portion includes a first free end opposite the first connection portion and a first opening for insertion of a set screw;

the second bone mounting portion includes a second free end portion opposite the second connecting portion and a second opening into which a set screw is inserted;

the first bone mounting part and the second bone mounting part are used for mounting and fixing the first part and the second part on two sides of a growth plate through fixing screws inserted into the first opening and the second opening respectively;

the first opening comprises a first supporting part and a second supporting part which are arranged in the longitudinal direction of the opening, wherein the first supporting part is positioned on one side, close to the bone surface, of the first bone mounting part and close to the first free end part, and the second supporting part is positioned on one side, far away from the bone surface, of the first bone mounting part and close to the first connecting part;

the second opening comprises a third supporting part and a fourth supporting part which are arranged in the longitudinal direction of the opening, wherein the third supporting part is positioned on one side, close to the bone surface, of the second bone mounting part and close to the second free end part, and the fourth supporting part is positioned on one side, far away from the bone surface, of the second bone mounting part and close to the second connecting part;

after the fixing screw is screwed into the bone through the first opening and the second opening, the first supporting part and the second supporting part are supported on different sides of the fixing screw, and the third supporting part and the fourth supporting part are supported on different sides of the fixing screw, so that the fixing screw is fixed in relative positions 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 of claim 1, wherein the orthopedic implant includes a stop configured to prevent the connecting portion from moving away from the facet.

3. The orthopedic implant of claim 2, wherein one of the first and second connecting portions includes spaced apart arms and the other has a projection extending between the arms, the arms and the projection having channels through which the pivot axis of the connecting portion passes to pivotally connect the first and second portions; the stop includes a first stop disposed on an end between the arms and a second stop on an end of the projection.

4. The orthopedic implant of claim 2, wherein the connecting portion is a spring member, and the retaining member comprises a "V" shaped spring plate disposed on the spring member, the "V" shaped tip of the spring plate facing the bone surface.

5. The orthopedic implant of claim 1, wherein at least one of the first and second supports is provided with a pressure relief zone.

6. The orthopedic implant of claim 1, wherein a longitudinal cross-section of the first opening includes a first oblique boundary line, wherein the first oblique boundary line is proximate the first free end portion; the first support portion is at least partially located on the first oblique boundary line.

7. The orthopedic implant of claim 6, wherein the longitudinal cross-section of the first opening includes a second oblique boundary line parallel to the first oblique boundary line, an arcuate boundary line joining the second oblique boundary line, wherein the second oblique boundary line is proximate the connecting portion; the second support portion is at least partially located on the arcuate boundary line.

8. The orthopedic implant of any of claims 1-7, wherein the first opening is chamfered on a side away from the facet, and the second support portion is at least partially disposed at the chamfer.

9. The orthopedic implant of any of claims 1-7, wherein the first opening does not intersect an axial extension of the insertion tip of the fixation screw in the second opening.

10. The orthopedic implant of any of claims 1-7, wherein the first opening and the second opening are in a "chevron" configuration based on a surface of the orthopedic implant adjacent the facet.

11. The orthopedic implant of any of claims 1-7, wherein a set screw is disposed perpendicular to a side of the first bone mounting portion adjacent the facet.

12. The orthopedic implant of any of claims 1-7, wherein the radial distance of the first and second support portions matches the outer diameter of the set screw.

13. The orthopedic implant of any of claims 1-7, wherein at least one of the first and second supports comprises a point-type support or a linear support.

14. The orthopedic implant of any of claims 1-7, wherein the first opening is symmetrically disposed with respect to the structure in the second opening.

15. The orthopedic implant of any of claims 1-7, wherein the first and second portions are made of a polymeric material.

16. A medical orthopaedic system capable of fixedly mounting an orthopaedic implant according to any one of claims 1 to 15 to a bone surface, the system comprising a retaining assembly and a guide unit;

the holding piece of the holding assembly comprises a guide part, one end of the guide part can extend into the first opening or the second opening and is matched with the inner wall of the first opening or the second opening;

the guiding unit is fixedly arranged on the guiding fixing part of the guiding part, and a guiding guide pin for guiding the fixing screw can be positioned on the bone through the first opening or the second opening through the guiding channel of the guiding element.

17. The medical orthopedic system according to claim 16, wherein a longitudinal 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, wherein the retainer further comprises a clip portion at least partially conforming to the first or second free end portion such that the wall portion of the first opening or the second opening is at least partially located in the space between the clip portion and the guide portion.

19. The medical orthopaedic system of claim 16 or 17, wherein the guide fixing is a through channel, the guide unit being at least partially inserted into the guide fixing.

20. The medical orthopedic system of claim 16 or 17, wherein a central axis of the guide channel coincides with a central axis of the first or second opening.

Images