Hip joint surgery guide

Abstract

The present application relates to the field of medical devices, and in particular to a hip joint surgical guide, the hip joint surgical guide comprising a guide body, the guide body comprising a lunate matching plate, a horseshoe fossa matching plate and a rotating support portion, the lunate matching plate, the horseshoe fossa matching plate and the rotating support portion are respectively connected to a connecting portion; it also comprises a rotating portion that can rotate relative to the rotating support portion, the rotating portion is provided with a first positioning through hole, the rotating support portion is provided with a second positioning through hole, the lunate matching plate is provided with a third positioning through hole, and it also comprises a positioning member that can pass through the first positioning through hole, the second positioning through hole and the third positioning through hole in sequence; the rotating portion is also provided with a guide member arranged parallel to the positioning member. The present application is used to locate and guide the direction of acetabular grinding and implantation of acetabular cup prosthesis in total hip replacement.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a hip joint surgery guide. Background Art

[0002] In total hip replacement surgery, whether the acetabular cup prosthesis can be accurately installed is a key factor affecting the postoperative effect. Improper positioning of the acetabular cup prosthesis can cause complications such as prosthesis loosening, wear, and dislocation. Due to the particularity of the anatomical structure of the acetabulum, the placement of the acetabular cup prosthesis during surgery not only needs to consider the position of the acetabular cup prosthesis and good bone coverage, but also needs to accurately control the direction. The anteversion angle and abduction angle are difficult to accurately judge and adjust in space. At present, most doctors rely on experience and their own naked eye judgment methods to place the acetabular cup prosthesis by hand. The uncertainty of manual operation makes the patient's postoperative effect vary from surgeon to surgeon. A few doctors have tried to use acetabular guides for surgery, which increases the accuracy of intraoperative positioning and guidance; however, the guides on the market still have certain defects. For example, the hip surgery guide provided by CN202022814417.5 needs to cross the acetabulum, and the joint capsule needs to be peeled off during the operation; the hip surgery guides provided by CN202020158007.7 and CN201420515209.7 have a matching surface covering the inner surface of the acetabulum as a whole piece, and the acetabulum lunate surface and the horseshoe fossa have obvious steps. For some patients, the step angle formed by the acetabulum lunate surface and the horseshoe fossa is even less than 90°, which makes it impossible for the guide to be effectively matched at the step. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a hip joint surgery guide for positioning and guiding the direction of acetabular grinding and acetabular cup prosthesis implantation in total hip replacement surgery, thereby solving the problems in the prior art.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides a hip joint surgery guide, including a guide body, the guide body including a lunate matching plate, a horseshoe fossa matching plate and a rotation support part, the lunate matching plate, the horseshoe fossa matching plate and the rotation support part are respectively connected to the connecting part; it also includes a rotating part that can rotate relative to the rotation support part, the rotating part is provided with a first positioning through hole, the rotation support part is provided with a second positioning through hole, the lunate matching plate is provided with a third positioning through hole, and also includes a positioning member that can pass through the first positioning through hole, the second positioning through hole and the third positioning through hole in sequence; the rotating part is also provided with a guide member arranged parallel to the positioning member.

[0005] In some embodiments of the present application, the meniscus matching plate includes a meniscus fitting surface, the meniscus fitting surface is suitable for fitting the meniscus; the upper edge contour of the meniscus fitting surface is suitable for matching the acetabular labrum contour; the fitting area of ​​the meniscus fitting surface is 500mm2 ~2000mm 2 .

[0006] In some embodiments of the present application, the horseshoe socket matching plate includes a horseshoe socket fitting surface, and the horseshoe socket fitting surface is suitable for fitting one end of the horseshoe socket close to the meniscus; the fitting area of ​​the horseshoe socket fitting surface is 200mm 2 ~600mm 2 .

[0007] In some embodiments of the present application, the meniscus matching plate is connected to the rotation support portion via one or more first connecting members; the horseshoe socket matching plate is connected to the rotation support portion via one or more second connecting members.

[0008] In some embodiments of the present application, the rotating support portion is a frustum, and the diameter of the frustum gradually decreases from the end close to the meniscus matching plate to the end far away from the meniscus matching plate.

[0009] In some embodiments of the present application, a rotation support accommodating cavity is provided on the rotating portion, and the rotation support accommodating cavity is respectively connected to the first positioning through hole and the second positioning through hole.

[0010] In some embodiments of the present application, the diameter of the rotation support accommodating cavity gradually decreases from the end close to the meniscus matching plate to the end away from the meniscus matching plate.

[0011] In some embodiments of the present application, the first positioning through hole is suitable for matching the center of the acetabulum.

[0012] In some embodiments of the present application, a guide hole matching with the guide member is provided on the rotating portion.

[0013] In some embodiments of the present application, the positioning member includes a positioning needle tip; the guide member includes a guide needle tip.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] 1) In the present application, the hip joint surgery guide can match the acetabulum without stripping the joint capsule.

[0016] 2) In the present application, the hip joint surgery guide plate adopts a separate matching surface, that is, the lunate matching plate and the horseshoe matching plate are separately arranged to overcome the step problem.

[0017] 3) In this application, the matching features of the hip surgery guide include the lunate surface, the horseshoe fossa, and the acetabular labrum, and the matching accuracy is high;

[0018] 4) In the present application, the guide member of the hip joint surgery guide is located at the sciatic ramus, which is beneficial for exposure of the acetabulum.

[0019] 5) In the present application, the first positioning through hole is set at the center of the acetabulum. The positioning piece is placed into the bone surface to achieve positioning and also marks the starting grinding position of the acetabulum, which is easy to use.

[0020] 6) In the present application, the coverage of the lunate matching plate does not exceed one-half of the front and rear corners of the lunate, and the matching surface of the horseshoe fossa matching plate is located within one-half of the horseshoe fossa near one end of the lunate, thereby reducing ligament stripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic diagram of the split structure of the hip joint surgery guide plate of the present application.

[0022] Figure 2 Shown is a schematic structural diagram of the rotating portion in the hip joint surgery guide plate of the present application.

[0023] Figure 3 Shown is a schematic diagram of the structure of the acetabulum and sciatic ramus of the present application.

[0024] Figure 4 Shown is a structural schematic diagram of the hip joint surgery guide plate of the present application in use.

[0025] Component number description

[0026] 1 Hip surgery guide

[0027] 11 Guide body

[0028] 111 Lunar matching plate

[0029] 112 Horseshoe Nest Matching Plate

[0030] 113 Rotating support

[0031] 114 Connection

[0032] 1141 First connecting piece

[0033] 1142 Second connecting piece

[0034] 115 Second positioning through hole

[0035] 116 The third positioning hole

[0036] 12 Rotating part

[0037] 121 Rotating support chamber

[0038] 122 Guide hole

[0039] 123 First positioning through hole

[0040] 13 Positioning piece

[0041] 14 Guide

[0042] 2 Acetabulum

[0043] 21 Lunar face

[0044] 211 Lunar front corner

[0045] 212 Lunar surface posterior corner

[0046] 22 Horseshoe Nest

[0047] 23 Acetabular labrum

[0048] 3 Sciatic rami DETAILED DESCRIPTION

[0049] In the description of the present invention, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are only used to match the contents disclosed in the specification for people familiar with the technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0051] like Figures 1 to 4As shown, an embodiment of the present invention relates to a hip joint surgery guide, which includes a guide body 11, and the guide body 11 includes a lunate matching plate 111, a horseshoe fossa matching plate 112 and a rotation support portion 113, wherein the lunate matching plate 111, the horseshoe fossa matching plate 112 and the rotation support portion 113 are respectively connected to a connecting portion 114; it also includes a rotating portion 12 that can rotate relative to the rotation support portion 113, the rotating portion 12 is provided with a first positioning through hole 123, the rotation support portion 113 is provided with a second positioning through hole 115, the lunate matching plate 111 is provided with a third positioning through hole 116, and it also includes a positioning member 13 that can pass through the first positioning through hole 123, the second positioning through hole 115 and the third positioning through hole 116 in sequence; the rotating portion 12 is also provided with a guide member 14 arranged parallel to the positioning member. In the hip joint surgery guide of the present application, when used, the first positioning through hole 123, the second positioning through hole 115 and the third positioning through hole 116 are coaxially arranged to form a channel for the positioning member 13 to pass through. The positioning member 13 passes through the first positioning through hole 123, the second positioning through hole 115 and the third positioning through hole 116 in sequence and is then placed into the bone surface, which can not only achieve positioning, but also assist in fixing the guide body 11 and the rotating part 12, thereby increasing the stability of the hip joint surgery guide. The guide member 14 matches the ischial ramus 3, which is conducive to the exposure of the acetabulum 2.

[0052] In the hip joint surgery guide provided in the embodiment of the present application, the meniscus matching plate 111 includes a meniscus 21 fitting surface, and the meniscus 21 fitting surface is suitable for fitting the meniscus 21. The structure of the meniscus 21 fitting surface conforms to the basic physiological structure of the human body. Figure 3 As shown, the meniscus 21 is divided into an upper part of the meniscus 21 and a lower part of the meniscus 21 along a dotted line. The lower part of the meniscus 21 includes a front corner portion 211 of the meniscus and a rear corner portion 212 of the meniscus. Figure 4 As shown, the meniscus 21 fitting surface fits the upper part of the meniscus 21 and at least part of the lower part of the meniscus 21. Specifically, the meniscus 21 fitting surface fits no more than 1 / 2 of the anterior angle 211 of the meniscus, and no more than 1 / 2 of the posterior angle 212 of the meniscus, thereby reducing ligament stripping. In addition, the upper edge contour of the meniscus 21 fitting surface is consistent with the contour of the acetabular labrum 23. In one embodiment, the fitting area of ​​the meniscus fitting surface is 500mm. 2 ~2000mm 2 , 500mm 2 ~1000mm 2 , 1000mm 2 ~1500mm 2 , or 1500mm 2 ~2000mm 2 wait.

[0053] In the hip joint surgery guide provided in the embodiment of the present application, Figure 1 As shown, the horseshoe socket matching plate 112 includes a horseshoe socket 22 fitting surface, such as Figure 4 As shown, the fitting surface of the horseshoe fossa 22 is suitable for fitting one end of the horseshoe fossa 22 close to the meniscus 21. The structure of the fitting surface of the horseshoe fossa 22 conforms to the basic physiological structure of the human body. Figure 3 and 4 As shown, the fitting surface of the horseshoe fossa 22 is located within one-half of the end of the horseshoe fossa 22 close to the meniscus 21, thereby reducing ligament stripping. In one embodiment, the fitting area of ​​the horseshoe fossa fitting surface can be 200 mm 2 ~600mm 2 , 200mm 2 ~400mm 2 , or 400mm 2 ~600mm 2 wait.

[0054] In the hip joint surgery guide provided in the embodiment of the present application, Figure 1 As shown, the meniscus matching plate 111 and the rotating support part 113 are connected by one or more first connecting members 1141, so that the support between the meniscus matching plate 111 and the rotating support part 113 can be more firmly. In some specific embodiments, the number of first connecting members 1141 can be, for example, 1 to 3, preferably 3, and the angle between adjacent first connecting members 1141 can be 50 to 100 degrees.

[0055] In the hip joint surgery guide provided in the embodiment of the present application, Figure 1 As shown, the horseshoe socket matching plate 112 is connected to the rotation support portion 113 via one or more second connecting members 1142. In some specific embodiments, the number of the first connecting members 1141 may be, for example, 1 to 3, preferably 1.

[0056] In the hip joint surgery guide provided in the embodiment of the present application, the rotation support portion 113 is a frustum, and the diameter of the frustum gradually decreases from the end close to the meniscus matching plate 111 to the end away from the meniscus matching plate 111. The diameter of the rotation support accommodating cavity 121 gradually decreases from the end close to the meniscus matching plate 111 to the end away from the meniscus matching plate 111. The maximum diameter of the frustum is 7mm to 15mm, 7mm to 10mm, or 10mm to 15mm, etc. The minimum diameter of the frustum can be 5mm to 13mm, 5mm to 8mm, 8mm to 10mm, or 10mm to 13mm, etc. The height of the frustum is 7mm to 15mm, 7mm to 10mm, or 10mm to 15mm, etc.

[0057] In the hip joint surgery guide provided in the embodiment of the present application, the rotation support portion 113 is a rotation arm, and the length of the rotation arm is 20 mm to 60 mm, 20 mm to 40 mm, or 40 mm to 60 mm.

[0058] In the hip joint surgery guide provided in the embodiment of the present application, Figure 2 As shown, the rotating part 12 is provided with a rotating support accommodating cavity 121, and the rotating support accommodating cavity 121 is used to accommodate the rotating support part 113. By rotating the rotating part 12, the rotating part 12 can be rotated to a suitable angle relative to the rotating support part 113. The rotating support accommodating cavity 121 is respectively connected with the first positioning through hole 123 and the second positioning through hole 115. The rotating support accommodating cavity 121 is coaxial with the first positioning through hole 123 and the second positioning through hole 115.

[0059] In the hip joint surgery guide provided in the embodiment of the present application, Figure 1 and 2 As shown, the rotating part 12 is provided with a guide hole 122 matched with the guide member 14. The guide member 14 can pass through the guide hole 122 and be fixed on the ischial ramus 3, which is conducive to the exposure of the acetabulum 2. The first positioning through hole 123 is parallel to the axial direction of the guide hole 122.

[0060] In the hip joint surgery guide provided in the embodiment of the present application, the first positioning through hole 123 is suitable for matching the center of the acetabulum 2 .

[0061] In the hip joint surgery guide provided in the embodiment of the present application, Figure 1 As shown, the positioning member 13 includes a positioning needle tip, which can be better fixed on the bone surface of the meniscus 21.

[0062] In the hip joint surgery guide provided in the embodiment of the present application, Figure 1 As shown, the guide member 14 includes a guide needle tip, through which the guide member 14 can be better fixed on the ischial ramus 3.

[0063] In the hip joint surgery guide provided in the embodiment of the present application, the diameters of the first positioning through hole 123, the second positioning through hole 115 and the third positioning through hole 116 are slightly larger than the diameter of the positioning member 13. In some embodiments, the diameters of the first positioning through hole 123, the second positioning through hole 115 and the third positioning through hole 116 are 1.5 mm to 5 mm. The length of the positioning member 13 is 100 mm to 200 mm.

[0064] In the hip joint surgery guide provided in the embodiment of the present application, the diameter of the guide hole 122 is equal to or slightly larger than the diameter of the guide member 14. In some embodiments, the diameter of the guide hole 122 is 1.5 mm to 5 mm. The length of the guide member 14 is 100 mm to 200 mm.

[0065] The use process of this hip surgery guide:

[0066] 1) Matching the surface of the acetabulum 2 by the lunate matching plate 111 and the horseshoe fossa matching plate 112, positioning and placing the guide plate body 11;

[0067] 2) Assemble the swing arm by matching the cone and the cone hole;

[0068] 3) The positioning needle is passed through the first positioning through hole 123 and the second positioning through hole 115 and then placed into the bone surface to assist in fixing the guide plate body 11 and the rotary arm;

[0069] 4) Rotate the rotary arm on the ischial ramus 3 and insert the guide member 14 through the guide hole 122;

[0070] 5) Remove the guide plate body, the swing arm, and the positioning member 13;

[0071] 6) Using the small hole left by the positioning member 13 on the bone surface as the starting point for filing, file along the direction of the guide member 14;

[0072] 7) After the acetabulum 2 is ground and filed, the acetabulum 2 cup prosthesis is placed along the direction of the guide member 14.

[0073] In summary, the hip joint surgery guide provided in the embodiment of the present application:

[0074] 1) In the present application, the hip joint surgery guide can match the two acetabulum sockets without stripping the joint capsule.

[0075] 2) In the present application, the hip joint surgery guide plate adopts a separate matching surface, that is, the lunate matching plate 111 and the horseshoe matching plate 112 are separately arranged to overcome the step problem.

[0076] 3) In the present application, the matching features of the hip joint surgery guide plate include the lunate surface 21, the horseshoe fossa 22, and the acetabular labrum 23, and the matching accuracy is high;

[0077] 4) In the present application, the guide member 14 of the hip joint surgery guide is located on the ischial ramus 3 , which is beneficial for exposing the acetabulum 2 .

[0078] 5) In the present application, the first positioning through hole 123 is arranged at the center of the acetabulum 2, and the positioning member 13 is inserted into the bone surface to achieve positioning and also marks the starting grinding position of the acetabulum 2, which is convenient to use.

[0079] 6) In the present application, the coverage of the lunate matching plate 111 does not exceed one-half of the front corner 211 and the rear corner of the lunate, and the matching surface of the horseshoe fossa matching plate 112 is located within one-half of the horseshoe fossa 22 near one end of the lunate 21, thereby reducing ligament stripping.

[0080] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0081] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A hip joint surgery guide, characterized in that: The invention comprises a guide plate body (11), wherein the guide plate body (11) comprises a meniscus matching plate (111), a horseshoe fossa matching plate (112) and a rotating support portion (113), wherein the meniscus matching plate (111), the horseshoe fossa matching plate (112) and the rotating support portion (113) are respectively connected to a connecting portion (114); further comprising a rotating portion (12) which can rotate relative to the rotating support portion (113), wherein the rotating portion (12) is provided with a first positioning through hole (123), wherein the rotating support portion (113) is provided with a second positioning through hole (115), wherein the meniscus matching plate (111) is provided with a third positioning through hole (116); further comprising a positioning member (13) which can pass through the first positioning through hole (123), the second positioning through hole (115) and the third positioning through hole (116) in sequence; and further comprising a guide member (14) which is arranged parallel to the positioning member (13) on the rotating portion (12).

2. The hip joint surgery guide according to claim 1, characterized in that: The meniscus matching plate (111) comprises a meniscus fitting surface, which is suitable for fitting the meniscus; the upper edge contour of the meniscus fitting surface is suitable for matching the acetabular labrum contour; the fitting area of ​​the meniscus fitting surface is 500 mm 2 ~2000mm 2 .

3. The hip joint surgery guide according to claim 1, characterized in that: The horseshoe socket matching plate (112) comprises a horseshoe socket fitting surface, wherein the horseshoe socket fitting surface is suitable for fitting one end of the horseshoe socket close to the meniscus; the fitting area of ​​the horseshoe socket fitting surface is 200 mm 2 ~600mm 2 .

4. The hip joint surgery guide according to claim 1, characterized in that: The meniscus matching plate (111) is connected to the rotation support part (113) via one or more first connecting members (1141); and the horseshoe socket matching plate (112) is connected to the rotation support part (113) via one or more second connecting members (1142).

5. The hip joint surgery guide according to claim 1, characterized in that: The rotating support part (113) is a frustum, and the diameter of the frustum gradually decreases from an end close to the meniscus matching plate (111) to an end far away from the meniscus matching plate (111).

6. The hip joint surgery guide according to claim 1, characterized in that: The rotating part (12) is provided with a rotating support accommodating cavity (121), and the rotating support accommodating cavity (121) is respectively connected to the first positioning through hole (123) and the second positioning through hole (115).

7. The hip joint surgery guide according to claim 6, characterized in that: The diameter of the rotation support accommodating cavity (121) gradually decreases from an end close to the meniscus matching plate (111) to an end far from the meniscus matching plate (111).

8. The hip joint surgery guide according to claim 1, characterized in that: The first positioning through hole (123) is suitable for matching the center of the acetabulum.

9. The hip joint surgery guide according to claim 1, characterized in that: The rotating part (12) is provided with a guide hole (122) which matches with the guide member (14).

10. The hip joint surgery guide according to claim 1, characterized in that: The positioning member (13) comprises a positioning needle tip; and the guiding member (14) comprises a guiding needle tip.

Images