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Integrated acetabular cup lining and preparation process thereof

A preparation process and integrated technology, applied in the field of prosthesis, can solve the problems of poor stability of the prosthesis, increased wear of the ball head, osteolysis of patients, etc., and achieve the effect of increasing stability and reducing eccentricity

Pending Publication Date: 2020-09-01
天衍医疗器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the press-fit force is not well controlled, the inner liner implanted in the human body will loosen or rotate in the outer cup, and the loose inner liner and the matching ball head will wear more, resulting in osteolysis of the patient and poor long-term stability of the prosthesis. In severe cases, the prosthesis can only be revised in the later stage, which brings economic and physical losses to the patient.

Method used

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  • Integrated acetabular cup lining and preparation process thereof
  • Integrated acetabular cup lining and preparation process thereof
  • Integrated acetabular cup lining and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: Preparation of one-piece acetabular cup liner, wherein the material of cobalt-chromium-molybdenum alloy includes Cr 26.5%, Mo 4.5%, C 0.1%, Fe 0.5%, Si 0.6%, Mn0.6%, Ni0. 3%, Co is the matrix.

[0043] The preparation process of one-piece acetabular cup liner is:

[0044] Step 1, casting the outer cup of the bipolar head, the method of casting the outer cup of the bipolar head is wax casting, and the wax casting includes 1) preparing a wax mold shell, the wax mold shell includes a surface layer and a back layer, and the surface layer contains 0.02% latex, the back layer contains 0.03% latex by mass, 2) smelting and casting the outer cup of the bipolar head, melting the cobalt-chromium-molybdenum alloy material at high temperature to obtain the alloy pouring liquid, and the high-temperature melting of the cobalt-chromium-molybdenum alloy material The rate is 37°C / min, the temperature is first raised to 1300°C, smelted for 2.5 hours, then the heating rate i...

Embodiment 2

[0052] Embodiment 2: Preparation of one-piece acetabular cup liner, wherein the material of cobalt-chromium-molybdenum alloy includes Cr 28%, Mo6%, C 0.2%, Fe 0.4%, Si 0.8%, Mn 0.9%, Ni 0.5%, Co is the matrix.

[0053] The preparation process of one-piece acetabular cup liner is:

[0054] Step 1, casting the outer cup of the bipolar head, the method of casting the outer cup of the bipolar head is wax casting, and the wax casting includes 1) preparing a wax mold shell, the wax mold shell includes a surface layer and a back layer, and the surface layer contains 0.02% latex, the back layer contains 0.03% latex by mass, 2) smelting and casting the outer cup of the bipolar head, melting the cobalt-chromium-molybdenum alloy material at high temperature to obtain the alloy pouring liquid, and the high-temperature melting of the cobalt-chromium-molybdenum alloy material The rate is 40°C / min, the temperature is first raised to 1300°C, smelted for 2.8 hours, and then the heating rate i...

Embodiment 3

[0062] Example 3: Preparation of one-piece acetabular cup liner, wherein the material of cobalt-chromium-molybdenum alloy includes Cr 30.0%, Mo 7.0%, C 0.35%, Fe 1.0%, Si 1.0%, Mn 1.0%, Ni 1.0% by mass %, Co is the matrix.

[0063] The preparation process of one-piece acetabular cup liner is:

[0064] Step 1, casting the outer cup of the bipolar head, the method of casting the outer cup of the bipolar head is wax casting, and the wax casting includes 1) preparing a wax mold shell, the wax mold shell includes a surface layer and a back layer, and the surface layer contains 0.02% latex, the back layer contains 0.03% latex by mass, 2) smelting and casting the outer cup of the bipolar head, melting the cobalt-chromium-molybdenum alloy material at high temperature to obtain the alloy pouring liquid, and the high-temperature melting of the cobalt-chromium-molybdenum alloy material The rate is 42°C / min, first raise the temperature to 1300°C, smelt for 3 hours, then keep the heating ...

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Abstract

The invention discloses an integrated acetabular cup lining and a preparation process thereof. The integrated acetabular cup lining comprises a bipolar head outer cup, a bipolar head lining is arranged in the bipolar head outer cup, a clamping ring is arranged in the bipolar head lining, and the bipolar head outer cup and the bipolar head lining are integrally formed. The preparation process of the integrated acetabular cup lining comprises the following steps: step 1, casting the bipolar head outer cup; step 2, processing the inner molded surface of the outer cup; step 3, producing the bipolar head lining through injection molding; step 4, processing a sprue platform of a blank piece; step five, processing the inner molded surface of the blank piece; step six, polishing the outer molded surface of the blank piece; and step seven, mounting the clamping ring. The eccentric distance between the bipolar head outer cup and the bipolar head lining is reduced or eliminated; the matching stability of the outer cup and the lining is improved, the air permeability of the mold shell is improved through the integrated acetabular cup lining preparation process, the rejection rate of casting air holes is reduced, the bipolar head outer cup and the bipolar head lining are integrally formed, and the eccentric distance between the outer cup and the lining is reduced.

Description

technical field [0001] The invention relates to the field of prostheses, in particular to an integrated acetabular cup liner and a preparation process thereof. Background technique [0002] As the main weight-bearing joint, the hip joint has a high incidence of damage. Once the disease occurs, the function of the hip joint is often limited and the quality of life is seriously affected. As an effective solution, hip replacement surgery has been used for more and more people. accepted by patients. [0003] The hip joint is composed of the femoral head and the acetabular joint surface. The total hip artificial joint system is composed of the femoral stem, the femoral ball head, the acetabular cup and the polyethylene lining; while the half hip joint only has the femoral stem and the ball head without the acetabular cup and lining. The two parts are different in the femoral ball head. The whole hip has only one smaller ball head, while the half hip often has two ball heads, on...

Claims

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Application Information

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IPC IPC(8): A61F2/34A61F2/30B22C9/04B22C9/22B29C45/14
CPCA61F2/34A61F2/30942B22C9/04B22C9/22B29C45/1418A61F2002/3401A61F2310/00029B29C2045/14237
Inventor 刘娟
Owner 天衍医疗器材有限公司
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