TWI606813B - Multi-piece combined artificial joint cup structure - Google Patents

Description

Multi-piece combined artificial joint cup structure

The present invention relates to an artificial joint structure; more specifically, a cup structure can be divided into several pieces according to the distance from the adjacent bones according to the number and angle of adjacent bones, and respectively, and adjacent bones are respectively performed. Fixed multi-piece combined artificial joint cup structure.

Generally speaking, in the related field of artificial joints, the artificial joint cup structure patent focuses on the wear between the artificial joint cup and the artificial joint sphere and the improvement of related problems. However, after the artificial joint is implanted, the main cause of the treatment failure lies in the artificial joint. Engage and stabilize with adjacent bones.

For example, in Chinese Patent Publication No. CN105030380, a composite artificial hip joint cup is disclosed, which has a concave semi-arc shape including an outer layer and an inner layer; the inner surface of the PEEK in the structure of the invention is The combination of different outer surfaces of the cup liner can reduce stress concentration and reduce the risk of fretting wear and liner damage; or the inner surface of PEEK directly forms a friction pair with the surface of the femoral head to reduce the external surface of the femoral head. The wear and tear, but the connection and stability of the artificial joint and the adjacent bones are not more inked.

Or, as disclosed in Chinese Patent Publication No. CN103379879B, an acetabular cup component for an artificial hip joint, the invention utilizes the design of a taper and a trough body to The olefin bearing is fixed in the acetabular cup, so the ceramic bearing can be inserted into the acetabular cup to prevent the bearing of the ceramic material from breaking through the contact area between the bearing and the acetabular cup; however, this patent is on the cup. There is a structural improvement of the tapered portion and the trough body, but still focuses on the wear problem of the relative rotation between the artificial joint members, and does not mention the problem of improving the connection with the adjacent bones.

Further, as disclosed in Chinese Patent Publication No. CN205198214U, a cup for an artificial joint includes: a cup mouth, a cup bottom and a cup wall, wherein at least one convex is provided on the outer surface of the cup wall near the cup mouth. Part. The cup of the utility model is subjected to the reaction force of the glenoid only on the convex portion of the cup mouth after the joint girdle is implanted, thereby avoiding the risk of disengagement of the cup and the glenoid, and realizing the cup in the glenoid The firmness of the fixation improves the quality of the operation. That is, the new patent utilizes a raised portion design to allow the cup to be more securely fixed to the adjacent bone. However, if the integrally formed cup has a fine adjustment in angle or size after replacement, Need to re-place a new size cup.

The problem to be solved by the invention is that after the artificial joint is implanted, the connection and stability of the artificial joint and the adjacent bone cause poor treatment failure; the present invention overcomes the use of a multi-piece combined artificial joint cup structure. The above problem.

In order to solve the above problems, the present invention discloses a multi-piece combined artificial joint cup structure, which is suitable for an artificial joint of a human joint replacement treatment, and the artificial joint cup structure is fixed to an adjacent bone of a human joint to be replaced. The artificial joint cup structure and the artificial joint sphere structure are relatively rotated to form a joint of the human body, and the structure comprises: a plurality of cup structure pieces, Each of the cup structure sheets comprises an outer structural surface that is engaged with the bone adjacent to the human joint, and an inner structural surface that is in contact with the relatively rotating artificial joint sphere structure, and the cup structure sheets are combined to form a cup. a structural surface, the cup structure surface and the surface of the spherical body of the artificial joint ball structure are relatively rotatable; and a plurality of structural sheet fixing claws are disposed on the outer surface of each of the cup structure sheets for each of the cups The structural piece is fixed to the junction of each of the adjacent bones.

In one embodiment, the thickness of each of the cup structure sheets does not need to be uniform, and the thickness is set according to the distance between each adjacent bone and the artificial joint sphere structure.

In one embodiment, an adjustment gap is left between two adjacent cup structure sheets, and the adjustment gap is filled with bone cement to join the cup structure sheets.

In one embodiment, each of the cup structure sheets is provided with one or more holes for viewing the assembly of the artificial joint.

In one embodiment, the cup structure surface formed by combining the inner structural surfaces and the spherical surface of the artificial joint sphere structure further comprise a spherical PE material structure.

In one embodiment, the artificial joint is a hip joint, and the plurality of cup structure sheets are an anastomosis cup structure piece fixed to the intestinal bone, a pubic sac cup structure piece fixed to the pubic bone, and an ischial bone fixed to the ischial bone. Side cup structure sheet.

In the above embodiment, the structural piece fixing claw of the enterotic lateral cup structure sheet is a barb-shaped fixing claw, and the structural piece fixing claw of the pubic side cup structure piece is a conical fixed claw or a triangular tapered fixed claw, The structural piece fixing claw of the ischial side cup structure piece is a quadrangular pyramid fixing claw.

The main feature of the present invention is that the multi-piece combined artificial joint cup structure of the present invention can divide the cup structure into several pieces according to the number and angle of adjacent bones, and the distance from the adjacent bones as a reference thickness, and The adjustment gap left in the two adjacent cup structure sheets finely adjusts the combined cup structure surface to increase the fixation effect of the artificial joint cup structure and adjacent bones and reduce the wear of the artificial joint ball structure.

The present invention will be further described in conjunction with the drawings and specific embodiments, so that those skilled in the art can understand the invention and practice.

1‧‧‧Artificial joint cup structure

1'‧‧‧Acetabular Cup

11‧‧‧臼 Cup structure film

11A‧‧‧Intestinal side cup structure piece

11B‧‧‧pubic sac cup structure piece

11C‧‧‧Sacral side cup structure piece

111‧‧‧Outer structural surface

112‧‧‧ internal structural surface

112’‧‧‧臼 cup structure

113‧‧‧ holes

12‧‧‧Structural piece fixing claw

12A‧‧‧Intestinal bone structure piece fixation claw

12B‧‧ ‧ pubic side structure fixed claw

12C‧‧‧Sacral side structural piece fixation claw

13‧‧‧PE material structure

2‧‧‧Artificial joint sphere structure

21‧‧‧ sphere surface

3‧‧‧ adjacent bones

3A‧‧‧ Intestinal bone

3B‧‧‧ Pubic

3C‧‧‧ Ischia

G‧‧‧Adjustment gap

T1‧‧‧ thickness

T2‧‧‧ thickness

T3‧‧‧ thickness

1A is a schematic view showing the position of the acetabular cup of the embodiment of the present invention; FIG. 1B is a schematic view of the adjacent acetabular cup of the embodiment of the present invention; FIG. 1C is a schematic view of the acetabular cup structure of the artificial joint of the present invention; FIG. 2A is a structural schematic view of a structural sheet fixing claw according to the present invention; FIG. 2B is a schematic structural view of the intestinal bone side structural sheet fixing claw according to the present invention; The schematic diagram of the pubic side structure piece fixing claw; FIG. 2D is a schematic structural view of the ischial side structure piece fixing claw of the present invention.

The invention uses an artificial hip joint as an embodiment to illustrate the embodiment; the hip joint is located between the thigh bone and the pelvis of the human body, and is composed of a spherical femoral head above the thigh bone and an acetabular cup on the pelvis. The artificial joint cup structure of the present invention is an artificial joint acetabulum artificially manufactured to replace the acetabular cup. The cup; in contrast, the artificial joint sphere structure that rotates relative to the artificial joint acetabular cup is used to replace the spherical femoral head above the femur.

First, please refer to FIG. 1A to FIG. 1C. FIG. 1A and FIG. 1B are schematic diagrams showing the relevant positions of the acetabular cup and the adjacent bones in the embodiment of the present invention, and FIG. 1C is a schematic view showing the structure of the artificial joint acetabular cup according to the present invention.

As shown in Fig. 1A, adjacent bones 3 around the acetabular cup 1' are the upper intestinal bone 3A, the pubic bone 3B in the front, and the ischial bone 3C in the rear.

Referring to FIG. 1B and FIG. 1C simultaneously, the multi-piece combined artificial joint cup structure 1 (ie, the artificial joint acetabular cup) of the present invention comprises a plurality of cup structure sheets 11 , and each of the cup structure sheets 11 The outer structural surface 111 is connected to the bone 3 adjacent to the human joint, and the inner structural surface 112 is in contact with the relatively rotating artificial joint spherical structure 2, and each of the cup structural sheets 11 (in the case of the hip joint in the present case) The cup structure sheet 11 is an enteric bone side cup structure piece 11A which is in contact with the intestinal bone 3A, a pubic side cup structure piece piece 11B which is in contact with the pubic bone 3B, and an ischial side cup structure which is connected to the ischium 3C. After the sheets 11C) are combined, the inner structural faces 112 of the cup structure sheets 11 form a cup structure surface 112' which is rotatable relative to the ball surface 21 of the artificial joint ball structure 2.

In this embodiment, the thickness of each of the cup structure sheets 11 does not need to be uniform, and the thickness thereof is different according to the distance between each adjacent bone 3 and the artificial joint sphere structure 2, as shown in FIG. 1C. The thickness of the iliac crest cup structure piece 11A in the figure is the thickness T1, and the thickness of the pubic sac cup structure piece 11B in the figure is the thickness T2, and the thickness of the ischial side cup structure piece 11C in the figure is It is a thickness T3.

In this embodiment, an adjustment gap G is left between adjacent cup structure sheets 11, and the adjustment gap G is filled with bone cement to join the cup structure sheets 11.

In one embodiment, each of the cup structure sheets 11 is provided with one or more holes 113 for observing the assembly of the artificial joint.

1D, FIG. 1D is a cross-sectional view showing another embodiment of the present invention. In this embodiment, the inner structural faces 112 (shown in FIG. 1C) of the cup structure sheets 11 are combined to form a structure. The cup structure surface 112' and the spherical surface 21 of the artificial joint ball structure 2 further comprise a spherical PE material structure 13 for use as a friction layer of the artificial joint in relative rotation.

2A, FIG. 2A is a schematic structural view of the structural piece fixing claw 12 of the multi-piece combined artificial joint cup structure 1 according to the present invention; the structural piece fixing claw 12 of the present invention is disposed on each of the cymbals The outer structural surface 111 of the cup structure piece 11 is used to fix each of the cup structure piece pieces 11 to the joint of each of the adjacent bones 3.

Continuing to refer to FIG. 2B to FIG. 2D , FIG. 2B to FIG. 2D are schematic diagrams showing the structure of the fixing claws of the structural sheet according to the present invention. In the case of the hip joint of the present invention, the structural sheet fixing claw 12 as shown in FIG. 2A is 2B to 2D, the iliac bone side structural piece fixing claw 12A on the outer structural surface 111 of the iliac crest cup structure piece 11A, and the pubic symphysis piece fixing claw on the outer structural surface 111 of the pubic sac cup structure piece 11B. 12B and the ischial side structural sheet fixing claw 12C on the outer structural surface 111 of the ischial side cup structure sheet 11C.

Further, as shown in FIG. 2B, the enteric lateral condyle cup structure piece 11A is fixed to the intestinal bone 3A through the intestinal side structural piece fixing claw 12A; The pubic sac cup structure piece 11B is fixed to the pubic bone 3B through the pubic symphysis piece fixing claw 12B; as shown in FIG. 2D, the sciatic side cup structure piece 11C is fixed by the ischial side structure piece fixing claw 12C. On the ischial 3C.

In this embodiment, as shown in FIG. 2A, the shape of each of the structural sheet fixing claws 12 has a different design according to the shape of each of the adjacent bones 3, such as the intestinal side cup structure sheet 11A. The iliac bone structure piece fixing claw 12A is a barb-shaped fixing claw, and the pubic side structure piece fixing claw 12B of the pubic symphysis cup structure piece 11B is a conical fixed claw or a triangular tapered fixed claw, and the sciatic side cup structure piece The ischial side structural piece fixing claw 12C of 11C is a quadrangular tapered fixing claw.

The invention is based on the above design, and can achieve three effects: 1. Using a multi-piece combination, the cup structure piece of the part can be matched with the joint surface of the adjacent bone to avoid the unstable situation after the replacement; 2. Adopting The multi-piece combination can be used to finely adjust the gap between the cup structure piece and the cup structure piece when combining, so that the connection between the replaced cup structure and the adjacent bone is better; 3. Each of the cup structure is on the piece The structural piece fixing claw can replace the bone nail, and each of the structural piece fixing claws is designed according to the appearance characteristics of each adjacent bone, and can be embedded in each adjacent bone, which can provide a more stable fixation than the bone nail. effect.

In the above, it is merely described that the present invention is an embodiment or an embodiment of the technical means for solving the problem, and is not intended to limit the scope of implementation of the present invention. That is, the equivalent changes and modifications made to the scope of the patent application of the present invention, or the scope of the patent application of the present invention, are covered by the scope of the invention.

1‧‧‧Artificial joint cup structure

11‧‧‧臼 Cup structure film

111‧‧‧Outer structural surface

12‧‧‧Structural piece fixing claw

3‧‧‧ adjacent bones

Claims (9)

The utility model relates to a multi-piece combined artificial joint cup structure, which is suitable for an artificial joint of a human joint replacement treatment, wherein the artificial joint cup structure is fixed to an adjacent bone of a human joint to be replaced, the artificial joint cup structure and an artificial The joint sphere structure is relatively rotated to achieve the joint of the human body, and the structure comprises: a plurality of cup structure sheets, each of the cup structure sheets comprising an outer structural surface that is connected with the bone adjacent to the human joint, and a The inner structural surface contacting the oppositely rotating artificial joint sphere structure, each of the cup structure sheets is combined to form a cup structure surface, the cup structure surface and the spherical surface of the artificial joint sphere structure are relatively rotatable; and The structural piece fixing claws are disposed on the outer structural surface of each of the cup structure sheets for fixing the cup structure piece to the joint of each adjacent bone; wherein the artificial joint is a hip joint, the plurality The sac cup structure piece is a sacral side cup structure piece fixed to the intestinal bone, a pubic sacral cup structure piece fixed to the pubic bone, and a sciatic side cup structure piece fixed to the ischial bone. The multi-piece combined artificial joint cup structure according to claim 1, wherein the thickness of each of the cup structure sheets does not need to be uniform, and the thickness is according to the structure of each adjacent bone and the artificial joint sphere structure. Distance setting. The multi-piece combined artificial joint cup structure according to claim 1, wherein an adjustment gap is left between two adjacent cup structure pieces, and the adjustment gap is filled with bone cement to connect the respective pieces. Cup structure piece. Multi-piece combined artificial joint cup knot as described in claim 1 Each of the cup structure sheets is provided with one or more holes for observing the assembly condition of the artificial joint. The multi-piece combined artificial joint cup structure according to claim 1, wherein each of the inner structural surface surfaces and the spherical surface of the artificial joint spherical structure further comprises a spherical surface. PE material structure. The multi-piece combined artificial joint cup structure according to claim 6, wherein the structural piece fixing claw of the enteric lateral cup structure piece is a barb-shaped fixing claw. The multi-piece combined artificial joint cup structure according to the sixth aspect of the invention, wherein the structural piece fixing claw of the pubic side cup structure piece is a conical fixed claw. The multi-piece combined artificial joint cup structure according to the sixth aspect of the invention, wherein the structural piece fixing claw of the pubic side cup structure piece is a triangular tapered fixed claw. The multi-piece combined artificial joint cup structure according to claim 6, wherein the structural piece fixing claw of the ischial side cup structure piece is a quadrangular pyramid fixed claw.