Acetabular lining driving guide ring

Abstract

The utility model discloses an acetabular lining driving guide ring which comprises an acetabular cup, an acetabular lining and a guide ring body, the acetabular lining is located in the acetabular cup, the guide ring body is located on the top of the acetabular cup, and one end of the acetabular lining is clamped on the guide ring body. The guide ring comprises a guide ring body, a plurality of inner notches are formed in the inner side of the guide ring body at equal intervals, and a plurality of outer notches are formed in the outer side of the guide ring body at equal intervals. The conical surface structure of the guide ring body is in interference fit with the outer side conical surface of the acetabular lining, the inner diameter of the guide ring body located on the conical surface structure is smaller than the outer diameter of the end portion of the acetabular lining, and the end face of the guide ring is flush with and attached to the end face of an acetabular cup. The driving guide ring is matched with the two parts, so that the conical surfaces of the two parts are effectively aligned in the process that the acetabular lining is driven into the acetabular cup, unbalance loading is avoided, and the problem that the ceramic acetabular lining is broken due to uneven stress is solved; the elasticity of the guide ring is improved through the notches, and the guide ring can automatically fall off in the process that the acetabular lining is beaten into the acetabular cup.

Description

Technical Field

[0001] The utility model relates to the technical field related to hip replacement surgery, in particular to an acetabulum liner driving guide ring. Background Art

[0002] The hip joint connects the thighbone to the hip bone in the pelvis and plays a crucial role in human walking. When the hip joint is damaged due to illness or trauma, artificial hip replacement surgery is performed to heal it, remove the lesion, relieve pain, and restore joint mobility and function.

[0003] Existing publication number is CN107920899B discloses a kind of assembly ring that can be attached to the edge of the liner for acetabular cup.This assembly ring may include an alignment portion, which is shaped or configured to engage the lip portion of the acetabular cup when the liner is inserted into the acetabular cup so as to center the liner and correct any pivoting of the liner relative to the acetabular cup.A driving force can be applied to the liner to drive the liner into the acetabular cup, and the assembly ring guides the liner when the liner is inserted into the acetabular cup.Driving the liner into the acetabular cup can also cause the assembly ring to disengage from the liner.

[0004] During ceramic hip replacement surgery, the ceramic acetabular liner needs to be driven into the metal acetabular cup. If the acetabular liner is not coaxial during the process of being driven into the acetabular cup, it will cause an eccentric load on the fixed cone surface of the acetabular liner, which will increase the risk of uneven force and breakage of the ceramic acetabular liner during long-term use. Utility Model Content

[0005] The purpose of the utility model is to provide an acetabular liner insertion guide ring to solve the problem in the prior art that, during the process of inserting the acetabular liner into the acetabular cup, if the acetabular liner is not coaxial, an eccentric load will be generated on the fixed conical surface of the acetabular liner, which will increase the risk of uneven force and breakage of the ceramic acetabular liner during long-term use.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an acetabular liner driving guide ring, comprising an acetabular cup, an acetabular liner and a guide ring, wherein the acetabular liner is located in the acetabular cup, the guide ring is located on the top of the acetabular cup, and one end of the acetabular liner is clamped on the guide ring;

[0007] The guide ring comprises a guide ring body, a plurality of inner notches are formed at equal intervals on the inner side of the guide ring body, and a plurality of outer notches are formed at equal intervals on the outer side of the guide ring body.

[0008] Preferably, the cross-sectional shape of the guide ring body is an inverted L-shape, and a conical surface structure is provided on the inner side of the lower portion of the guide ring body.

[0009] Preferably, the conical surface structure of the guide ring body is interference fit with the outer conical surface of the acetabular liner, and the inner diameter of the guide ring body located at the conical surface structure is smaller than the outer diameter of the end of the acetabular liner.

[0010] Preferably, eight outer notches and eight inner notches are provided, and the outer notches and the inner notches are distributed alternately, so as to improve the elasticity of the guide ring and enable the guide ring to automatically fall off during the process of the acetabular liner being driven into the acetabular cup.

[0011] Preferably, the end face of the guide ring is aligned with the end face of the acetabular cup, and the cooperation between the guide ring and the two ensures that the conical surfaces of the two components are effectively aligned during the process of driving the acetabular liner into the acetabular cup, avoiding unbalanced loading, thereby solving the problem of uneven force and breakage of the ceramic acetabular liner; the guide ring is made of implant-grade PEEK plastic.

[0012] Preferably, there is a gap between the bottom of the acetabular liner and the inner wall of the acetabular cup, the bottom of the acetabular liner is a horizontal structure, and the bottom of the inner side of the acetabular cup is a horizontal structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The conical surface structure of the guide ring body is interference fit with the outer conical surface of the acetabular liner. The inner diameter of the guide ring body located in the conical surface structure is smaller than the outer diameter of the end of the acetabular liner. The end face of the guide ring is aligned and flush with the end face of the acetabular cup. The cooperation between the guide ring and the two ensures that the conical surfaces of the two components are effectively aligned during the process of driving the acetabular liner into the acetabular cup, and there will be no misalignment, thereby avoiding eccentric loading and solving the problem of uneven force and breakage of the ceramic acetabular liner.

[0015] 2. The inner side of the guide ring body is provided with multiple inner notches at equal intervals, and the outer side of the guide ring body is provided with multiple outer notches at equal intervals; the elasticity of the guide ring is improved, and the acetabular liner can automatically fall off during the process of being inserted into the acetabular cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 It is a cross-sectional view of the utility model;

[0020] Figure 4 It is an exploded view of the utility model;

[0021] Figure 5 This is a structural diagram of the guide ring of the utility model;

[0022] Figure 6 This is a structural diagram of the guide ring of the utility model from the lower perspective;

[0023] Figure 7 It is a cross-sectional view of the guide ring of the utility model.

[0024] In the figure: 1, acetabular cup; 2, acetabular liner; 3, guide ring; 4, gap; 31, guide ring body; 32, outer notch; 33, inner notch; 34, cone structure. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0026] See also Figure 1-4 The acetabular liner 2 is fixed to the acetabular cup 1 and the acetabular liner 2 is fixed to the acetabular cup 1. The acetabular liner 2 is fixed to the acetabular cup 1 and the acetabular liner 2 is fixed to the acetabular cup 1. The acetabular liner 2 is fixed to the acetabular cup 1 and the acetabular liner 2 is fixed to the acetabular cup 1. The acetabular liner 2 is fixed to the acetabular cup 1 and the acetabular liner 2 is fixed to the acetabular cup 1. The acetabular liner 2 is fixed to the acetabular cup 1 and the acetabular liner 2 is fixed to the acetabular cup 1. The acetabular liner 2 is fixed to the acetabular cup 1 and the acetabular liner 2 is fixed to the acetabular cup

[0027] like Figure 1 、 5, 6, 7; the guide ring 3 is made of implant-grade PEEK plastic; the guide ring 3 includes a guide ring body 31, a plurality of inner notches 33 are provided on the inner side of the guide ring body 31 at equal intervals, and a plurality of outer notches 32 are provided on the outer side of the guide ring body 31 at equal intervals; 8 outer notches 32 and 8 inner notches 33 are provided, and the outer notches 32 and the inner notches 33 are distributed alternately; the elasticity of the guide ring is improved, and the acetabular liner can automatically fall off during the process of being inserted into the acetabular cup; the cross-sectional shape of the guide ring body 31 is an inverted L-shape, and a conical surface structure 34 is provided on the inner side of the lower part of the guide ring body 31; the conical surface structure 34 of the guide ring body 31 is interference fit with the outer conical surface of the acetabular liner 2 The inner diameter of the guide ring body 31 located at the conical structure 34 is smaller than the outer diameter of the end of the acetabular liner 2; the conical structure of the guide ring body 31 is interference fit with the outer conical surface of the acetabular liner, and the inner diameter of the guide ring body located at the conical structure is smaller than the outer diameter of the end of the acetabular liner, and the end face of the guide ring is aligned and flush with the end face of the acetabular cup; the cooperation between the driving guide ring and the two ensures that the conical surfaces of the two components are effectively aligned during the driving of the acetabular liner into the acetabular cup, avoiding eccentric load, thereby solving the problem of uneven force and breakage of the ceramic acetabular liner; a plurality of inner notches are provided at equal intervals on the inner side of the guide ring body, and a plurality of outer notches are provided at equal intervals on the outer side of the guide ring body; the elasticity of the guide ring is improved, and the acetabular liner can automatically fall off during the driving of the acetabular liner into the acetabular cup.

[0028] The working principle of the present invention is as follows: the conical surface structure of the guide ring body is interference fit with the outer conical surface of the acetabular liner, the inner diameter of the guide ring body located in the conical surface structure is smaller than the outer diameter of the end of the acetabular liner, and the end face of the guide ring is aligned and flush with the end face of the acetabular cup; the cooperation between the guide ring and the two ensures that the conical surfaces of the two components are effectively aligned during the process of driving the acetabular liner into the acetabular cup, avoiding eccentric load and solving the problem of uneven force and breakage of the ceramic acetabular liner.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A guide ring for driving an acetabular liner, characterized in that: The invention comprises an acetabular cup (1), an acetabular liner (2) and a guide ring (3), wherein the acetabular liner (2) is located in the acetabular cup (1), the guide ring (3) is located on the top of the acetabular cup (1), and one end of the acetabular liner (2) is clamped on the guide ring (3); The guide ring (3) comprises a guide ring body (31), a plurality of inner notches (33) are provided at equal intervals on the inner side of the guide ring body (31), and a plurality of outer notches (32) are provided at equal intervals on the outer side of the guide ring body (31).

2. The acetabular liner driving guide ring according to claim 1, characterized in that: The cross-sectional shape of the guide ring body (31) is an inverted L-shape, and a conical surface structure (34) is provided on the inner side of the lower portion of the guide ring body (31).

3. The acetabular liner driving guide ring according to claim 2, characterized in that: The conical surface structure (34) of the guide ring body (31) is interference-fitted with the outer conical surface of the acetabulum liner (2), and the inner diameter of the guide ring body (31) at the conical surface structure (34) is smaller than the outer diameter of the end of the acetabulum liner (2).

4. The acetabular liner driving guide ring according to claim 1, characterized in that: There are eight outer notches (32) and eight inner notches (33), and the outer notches (32) and the inner notches (33) are distributed alternately.

5. The acetabular liner driving guide ring according to claim 1, characterized in that: The end surface of the guide ring (3) is aligned and flush with the end surface of the acetabulum cup (1), and the guide ring (3) is made of implant-grade PEEK plastic.

6. The acetabular liner driving guide ring according to claim 1, characterized in that: There is a gap (4) between the bottom of the acetabular liner (2) and the inner wall of the acetabular cup (1), the bottom of the acetabular liner (2) is a horizontal structure, and the bottom of the inner side of the acetabular cup (1) is a horizontal structure.

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