CN210009182U

CN210009182U - Femur template

Info

Publication number: CN210009182U
Application number: CN201920093777.5U
Authority: CN
Inventors: 赵军; 胡肖强; 许慧; 董骧
Original assignee: Beijing Naton Medical Science And Technology Research Institute Co Ltd; Beijing Naton Technology Group Co Ltd
Current assignee: Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2019-01-21
Filing date: 2019-01-21
Publication date: 2020-02-04
Anticipated expiration: 2029-01-21

Abstract

The present disclosure provides a femoral template. The femoral template may include a translation head, a stem prosthesis, and a positioning assembly. The moving head is provided with a sliding chute. The stem prosthesis is provided with a stem extending in a predetermined direction. The neck can slide into or out of the chute. The positioning assembly includes a resilient member and a plurality of recesses. The elastic piece is arranged on one of the sliding groove and the neck trunk, and the plurality of concave parts are arranged on the other one of the sliding groove and the neck trunk and are distributed along the preset direction. When the neck trunk slides into the sliding groove, the elastic piece can be clamped in any concave part. The present disclosure enables the determination of an adapted femoral stem prosthesis from the femoral template.

Description

Femur template

Technical Field

The present disclosure relates to the technical field of medical equipment, and in particular, to a femur template.

Background

With the widespread use of artificial joints in the orthopedic context, many joint destructive diseases are gradually overcome.

In hip arthroplasty, the greater trochanter height of the femur is often determined by a femoral template, and depending on the greater trochanter height, a femoral head resection is performed, and a fitted femoral stem prosthesis is selected. However, in the absence of the greater trochanter in the femur, an adapted femoral stem prosthesis cannot be selected by the femoral template.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

It is an object of the present disclosure to provide a femoral template by which an adapted femoral stem prosthesis can be determined.

According to one aspect of the present disclosure, there is provided a femoral template comprising:

the moving head is provided with a sliding chute;

the handle prosthesis is provided with a neck stem extending along a preset direction, and the neck stem can slide into or out of the sliding groove;

the positioning assembly comprises an elastic part and a plurality of sunken parts, the elastic part is arranged on one of the sliding chute and the neck trunk, and the sunken parts are arranged on the other one of the sliding chute and the neck trunk and are distributed along the preset direction;

when the neck trunk slides into the sliding groove, the elastic piece can be clamped in any one of the concave parts.

In an exemplary embodiment of the present disclosure, the elastic member is disposed on the neck stem, and the plurality of recesses are disposed on the sliding groove, and the elastic member includes:

the elastic arm extends along a preset direction, one end of the elastic arm is fixed to the neck trunk, the other end of the elastic arm is a free end, and the free end can move towards the central axis of the neck trunk;

the protruding part is arranged at the free end and protrudes along the direction departing from the central axis;

when the neck trunk slides in the sliding groove, the elastic arm is elastically deformed, so that the free end moves towards the central axis of the neck trunk; when the elastic arm is restored, the protruding part can be clamped in any one of the concave parts.

In an exemplary embodiment of the present disclosure, the chute has a first chute wall and a second chute wall that are oppositely disposed;

the plurality of the recessed portions comprise a plurality of first recessed portions and a plurality of second recessed portions, the plurality of first recessed portions are distributed on the first groove wall along the preset direction, and the plurality of second recessed portions are distributed on the second groove wall along the preset direction;

the elastic arms comprise a first elastic arm and a second elastic arm which are distributed on two sides of the central axis, a first protruding part is arranged at the free end of the first elastic arm, a second protruding part is arranged at the free end of the second elastic arm, and when the neck trunk slides in the sliding groove, the first elastic arm and the second elastic arm elastically deform so that the first protruding part and the second protruding part move towards the central axis of the neck trunk; when the first elastic arm is restored, the first protruding part can be clamped in any one first sunken part; when the second elastic arm is restored, the second protruding part can be clamped in any one of the second concave parts.

In an exemplary embodiment of the present disclosure, the first protrusion and the second protrusion are symmetrically disposed, and the axis of symmetry is the central axis.

In an exemplary embodiment of the disclosure, an orthographic projection of each first recess on the second groove wall is arranged alternately with each second recess, and the adjacent orthographic projections and the adjacent second recesses are partially overlapped.

In an exemplary embodiment of the present disclosure, the moving head further includes:

and the enclosing and blocking piece is arranged on the first groove wall and/or the second groove wall, and the enclosing and blocking piece and the sliding groove form a space for the neck to slide.

In an exemplary embodiment of the disclosure, a side of the protrusion facing away from the central axis is a curved surface.

In an exemplary embodiment of the present disclosure, a surface of the recess may be capable of mating with the arc.

In an exemplary embodiment of the present disclosure, the neck trunk is provided with size scales, the size scales are distributed along the preset direction, and when the moving head is located at a preset position on the neck trunk, the moving head covers the size scales; the size scales are sequentially exposed when the moving head slides from the preset position in a direction away from the stem prosthesis.

In an exemplary embodiment of the present disclosure, the moving head is provided with a first through hole, a second through hole and a third through hole distributed along a preset straight line, and the first through hole is located between the second through hole and the third through hole and at the center of the moving head; when the neck stem slides in the sliding groove, the preset straight line extends along the preset direction.

According to the femur template, the elastic part is arranged on one of the sliding groove and the neck trunk, and the plurality of concave parts are arranged on the other one of the sliding groove and the neck trunk and are distributed along the preset direction. With the dry spout of neck slip-in, because the elastic component can locate arbitrary depressed part by the card to the removal head that makes to have the spout can be fixed a position in a plurality of positions on the dry neck, thereby can be through adjusting the removal position of removal head on the dry neck of handle prosthesis, measure the femoral neck length of the thighbone that treats the restoration, and can confirm the femoral handle prosthesis of adaptation according to this femoral neck length.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

FIG. 1 is a schematic view of a stem prosthesis of a femoral template according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a moving head of a femoral template according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of the neck stem of the femoral template of an embodiment of the present disclosure;

FIG. 4 is a schematic plan view of a translation head of a femoral template according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a moving head with a fence in accordance with an embodiment of the present disclosure;

FIG. 6 is an assembly view of a mobile head and stem prosthesis having a circumferential stop according to embodiments of the present disclosure.

In the figure: 1. a stem prosthesis; 2. drying the neck; 3. a moving head; 31. a plate body; 32. an extension body; 4. a chute; 5. an elastic member; 51. a resilient arm; 511. a first resilient arm; 512. a second resilient arm; 52. a protrusion; 521. a first protrusion; 522. a second protrusion; 6. a recessed portion; 61. a first recess; 62. a second recess; 7. a first slot wall; 8. a second slot wall; 9. a surrounding blocking part; 10. a first through hole; 11. a second through hole; 12. a third through hole; 13. dimension calibration; 14. avoiding a space; 15. and a strip-shaped through hole.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. The terms "a" and "the" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

The disclosed embodiments provide a femoral template. As shown in fig. 1 to 4, the femoral template may comprise a moving head 3, a stem prosthesis 1 and a positioning assembly, wherein:

the moving head 3 is provided with a chute 4. The stem prosthesis 1 is provided with a stem 2 extending in a predetermined direction. The neck 2 can slide into and out of the chute 4. The positioning assembly comprises a resilient member 5 and a plurality of recesses 6. The elastic member 5 is disposed on one of the chute 4 and the neck shaft 2, and the plurality of recesses 6 are disposed on the other of the chute 4 and the neck shaft 2 and distributed along a predetermined direction. Wherein, when the neck stem 2 slides into the sliding groove 4, the elastic piece 5 can be clamped in any concave part 6.

In the femur template of the embodiment of the present disclosure, the elastic member 5 is disposed on one of the sliding groove 4 and the neck shaft 2, and the plurality of recesses 6 are disposed on the other of the sliding groove 4 and the neck shaft 2 and distributed along a predetermined direction. With neck 4 that slides in of trunk 2, because elastic component 5 can block locates arbitrary depressed part 6, make the shifting head 3 that has spout 4 can be fixed a position in a plurality of positions on neck 2 to can be through adjusting the shifting position of shifting head 3 on neck 2 of handle prosthesis 1, measure the femoral neck length of the thighbone of treating the restoration, and can confirm the femoral handle prosthesis of adaptation according to this femoral neck length.

The following describes in detail the portions of the femoral template of the embodiments of the present disclosure:

as shown in fig. 2 and 4, the moving head 3 may include a plate body 31. The plate 31 is circular, but may have other shapes. The plate body 31, when circular, may have an extension 32 extending outwardly in a radial direction. The moving head 3 may be provided with a chute 4. The slot 4 may be a through slot so that the neck 2 may slide into the slot 4, or of course, out of the slot 4. The slide groove 4 may extend in a radial direction of the plate body 31. The sliding groove 4 may extend from an end of the extending body 32 away from the plate body 31 to an end of the plate body 31 away from the extending body 32.

As shown in fig. 2 and 4, the chute 4 may include a first chute wall 7 and a second chute wall 8 disposed opposite each other. The first groove wall 7 and the second groove wall 8 may be disposed in parallel, and both may be perpendicular to the plate body 31. Furthermore, as shown in fig. 5 and 6, the first groove wall 7 may be provided with a surrounding stopper 9, and of course, the second groove wall 8 may also be provided with a surrounding stopper 9. The enclosure 9 and the chute 4 can form a space for the neck stem 2 to slide. Furthermore, the enclosing piece 9 disposed on the first groove wall 7 and the enclosing piece 9 disposed on the second groove wall 8 can be both in a plate structure and parallel to the plate body 31 of the moving head 3, so that the chute 4 is in a T-shaped groove structure.

As shown in fig. 1 and 3, the stem prosthesis 1 may have a neck stem 2. The neck stem 2 may extend in a predetermined direction to simulate the femoral neck of a femur to be repaired. The neck stem 2 can slide into or out of the slide groove 4, so that the neck stem 2 can slide in the slide groove 4 along the extension direction of the neck stem 2. Wherein the neck stem 2 can be the same shape as the straightedge. The neck stem 2 may be provided with a size scale 13. The size scales 13 may be distributed in a predetermined direction, i.e., along the extension direction of the neck shaft 2. When the moving head 3 is located at the preset position on the neck stem 2, the moving head 3 covers the size scale 13; when the moving head 3 is slid from this set position in a direction away from the stem prosthesis 1, the inch scale 13 is exposed in turn, so that the dimension scale 13 can be read. The size scale 13 may be the length size of the femoral neck of the femoral stem prosthesis, and may also be the model or length of the corresponding femoral stem prosthesis. When the size scales 13 are the models of the corresponding femoral stem prostheses, each model can correspond to a scale value, and a user can be conveniently and quickly helped to determine the model of the femoral stem prosthesis.

After the model of the femoral stem prosthesis is determined, a femoral head replacement component is selected to cooperate with the femoral stem prosthesis to form the desired femur. The present disclosure may select a femoral head replacement component via the moving head. The moving head can be fixed or have different sizes. The movable heads with different sizes correspond to the femoral head replacement parts with different models, and the larger the size of the movable head is, the larger the size of the model of the corresponding femoral head replacement part is. As shown in fig. 2 and 4, the moving head 3 may be provided with a first through hole 10, a second through hole 11, and a third through hole 12 distributed along a predetermined straight line. The predetermined straight line extends in a predetermined direction while the neck stem 2 slides in the slide groove 4. The first through hole 10 is located between the second through hole 11 and the third through hole 12, and is located at the center of the moving head 3. Taking the moving head 3 with the circular plate 31 as an example, the first through hole 10 is located at the center of the moving head 3. The size of the moving head 3 may be the diameter of the circular plate 31.

As shown in fig. 2 and 4, when the center of the femoral head of the femur to be repaired is found to be aligned with the second through hole 11, the read size scale 13 is larger than the actual length of the femoral neck to be repaired, so that the selected femoral stem prosthesis is larger, and a femoral head replacement part smaller than the femoral head replacement part corresponding to the moving head 3 needs to be selected; when the center of the femoral head of the femur to be repaired is aligned with the first through hole 10, the read size scale 13 is equal to the actual length of the femoral neck to be repaired, and the model of the femoral head replacement part to be selected is the same as the model of the femoral head replacement part corresponding to the moving head 3; when the center of the femoral head of the femur to be repaired is aligned with the third through hole 12, the read size scale 13 is smaller than the actual length of the femoral neck to be repaired, and a femoral head replacement part with a size larger than that of the femoral head replacement part corresponding to the moving head 3 needs to be selected. In one embodiment, the stem 2 may be provided with a strip-shaped through hole 15, as shown in fig. 1, 3 and 6. The long side of the strip-shaped through-hole 15 extends along a predetermined direction. When the neck stem 2 slides in the sliding groove 4, the first through hole 10, the second through hole 11 and the third through hole 12 are all communicated with the strip-shaped through hole 15, so that the central position of the femoral head can be conveniently observed through the strip-shaped through hole 15.

As shown in fig. 2 to 4, the positioning assembly may include an elastic member 5 and a plurality of recesses 6. In one embodiment, the elastic member 5 is disposed on the sliding groove 4, and the plurality of recesses 6 are disposed on the neck portion 2 and distributed along a predetermined direction. In another embodiment, the elastic member 5 is disposed on the neck portion 2, and the plurality of recesses 6 are disposed on the sliding groove 4 and distributed along a predetermined direction. When the neck stem 2 slides into the sliding groove 4, the elastic piece 5 can be clamped in any one of the concave parts 6, so that the sliding groove 4 can be positioned at a plurality of positions on the neck stem 2.

For example, as shown in fig. 2 to 4, the elastic member 5 is disposed on the neck portion 2, and the plurality of concave portions 6 are disposed on the sliding groove 4 and distributed along a predetermined direction. Wherein the elastic member 5 may include an elastic arm 51 and a protrusion 52. The elastic arm 51 may be fixed to the neck shaft 2 at one end and be a free end at the other end, and the elastic arm 51 extends along a predetermined direction, that is, along the extending direction of the neck shaft 2. The free end can be moved towards the central axis of the neck shaft 2 to enter an escape space 14. The projection 52 can be provided at the free end of the spring arm 51, i.e. the end of the spring arm 51 remote from the neck shaft 2, and the projection 52 projects in a direction away from the central axis of the neck shaft 2. When the neck trunk 2 slides in the sliding groove 4, the elastic arm 51 is elastically deformed, so that the free end moves towards the central axis of the neck trunk 2, namely the protruding part 52 moves towards the central axis of the neck trunk 2 and enters the avoiding space 14; when the elastic arm 51 is restored, the protrusion 52 can be engaged with any one of the recesses 6. In addition, the side of the protrusion 52 facing away from the central axis may be a curved surface, which may reduce the resistance experienced by the sliding slot 4 when sliding along the neck shaft 2. Further, the surface of the recess 6 can be fitted with the arc.

As shown in fig. 4, the plurality of recessed portions 6 may include a plurality of first recessed portions 61 and a plurality of second recessed portions 62, the plurality of first recessed portions 61 are distributed on the first slot wall 7 along the predetermined direction, and the plurality of second recessed portions 62 are distributed on the second slot wall 8 along the predetermined direction. In addition, as shown in fig. 3, the number of the elastic arms 51 may be two, i.e., a first elastic arm 511 and a second elastic arm 512. The first elastic arm 511 and the second elastic arm 512 can be distributed on two sides of the central axis of the neck stem 2, so that the first elastic arm 511 is arranged on one side of the central axis of the neck stem 2, and the second elastic arm 512 is arranged on the other side of the central axis of the neck stem 2. The free end of the first resilient arm 511 may be provided with a first protrusion 521 and the free end of the second resilient arm 512 may be provided with a second protrusion 522. The first and

second protrusions

521 and 522 may be symmetrically disposed about a central axis of the stem 2. When the neck stem 2 slides in the sliding slot 4, the first elastic arm 511 and the second elastic arm 512 can be elastically deformed, so that the first protruding part 521 and the second protruding part 522 both move towards the central axis of the neck stem 2 and enter the avoiding space 14. When the first elastic arm 511 is restored, the first protrusion 521 can be clamped in any one of the first recesses 61; when the second elastic arm 512 is restored, the second protrusion 522 can be engaged with any one of the second recesses 62.

As shown in fig. 4, in an embodiment, the orthographic projection of each first recess 61 on the second groove wall 8 completely coincides with each second recess 62, i.e. is not arranged alternately. In another embodiment, the orthographic projection of each first recess 61 on the second groove wall 8 may alternate with each second recess 62. Taking the first protrusion 521 and the second protrusion 522 symmetrically arranged as an example, when the first protrusion 521 is clamped in the first recess 61, the second protrusion 522 cannot be clamped in the second recess 62; when the second protrusion 522 is engaged with the second recess 62, the first protrusion 521 cannot be engaged with the first recess 61. Further, the orthographic projection of the first recess 61 on the second groove wall 8 and the adjacent second recess 62 may partially coincide, so that the sliding chute 4 with a fixed length may be provided with more recesses 6, and the elastic member 5 may be positioned at more positions. Of course, the orthographic projection of the first recess 61 on the second groove wall 8 and the adjacent second recess 62 may not coincide.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A femoral template, comprising:

the moving head is provided with a sliding chute;

2. The femoral template of claim 1, wherein the resilient member is disposed on the stem, and the plurality of recesses are disposed on the sliding slot, the resilient member comprising:

3. The femoral template of claim 2, wherein the chute has first and second oppositely disposed chute walls;

4. The femoral template of claim 3, wherein the first protrusion and the second protrusion are symmetrically disposed, the axis of symmetry being the central axis.

5. The femoral template of claim 4, wherein orthographic projections of each of the first concavities on the second slot wall alternate with each of the second concavities, and adjacent orthographic projections and second concavities partially coincide.

6. The femoral template of claim 3, wherein the translation head further comprises:

7. The femoral template of claim 2, wherein a side of the protrusion facing away from the central axis is curved.

8. The femoral template of claim 7, wherein a surface of the recess is configured to mate with the arcuate surface.

9. The femoral template of claim 1, wherein the neck stem is provided with a size scale, the size scale is distributed along the preset direction, and when the moving head is located at a preset position on the neck stem, the moving head covers the size scale; the size scales are sequentially exposed when the moving head slides from the preset position in a direction away from the stem prosthesis.

10. The femoral template according to claim 1, wherein the moving head is provided with a first through hole, a second through hole and a third through hole distributed along a preset straight line, and the first through hole is located between the second through hole and the third through hole and is located at the center of the moving head; when the neck stem slides in the sliding groove, the preset straight line extends along the preset direction.