Double-acting full hip acetabular prosthesis with clasp

Abstract

The invention belongs to the technical field of medical instruments, and discloses a double-acting full hip acetabular prosthesis with a clasp, which is used for solving the problems of high risk of hip dislocation due to developmental dysplasia of the hip, bone loss, joint or soft tissue relaxation. The structure from the outside to the inside includes: 1) an outer cup (requiring 3 acetabular screws or not requiring 3 acetabular screws); 2) an lining A, wherein the 1) outer cup and the 2 lining A form strong fixing cooperated with conicity, no relative movement is generated, that is, no jointsurface is generated, and the 2) lining A has a hemispherical inner ball joint surface; and a 4 lining B (a 6 lining inlaid with a 5 metal shell), wherein the 5 metal shell has a hemispherical outerball joint surface, and the 7) clasp. The inner ball joint surface of the lining A forms an outer joint with the outer spherical joint surface of the 5 metal shell, the inner spherical joint surface of the 6 lining and the outer spherical joint surface of the small spherical head form the inner joint, and the inner and outer joints form the double-acting total hip acetabular prosthesis featuring adouble lining and a double articular surface. The 7) clasp is placed in the 6 lining, which has anti-dislocation effect on the small ball head. The acetabular prosthesis is easy to install and can increase the mobility of the prosthesis, which can prevent acetabular dislocation, and reduces wear rate.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a double-moving total acetabular prosthesis with a snap ring for total hip replacement. Background technique [0002] In recent years, with the acceleration of population aging, the number of hip joint patients has been increasing, with a compound annual growth rate of 20%. Artificial hip replacement has become an effective treatment for many end-stage hip joint patients. Through replacement, you can Solve the pain, difficulty in movement and various complications of patients, such as deep vein thrombosis, pneumonitis and decubitus and other high-risk diseases, and restore the functions of the hip joints of patients, effectively improving the quality of life. [0003] The conventional acetabular prosthesis currently on the market consists of the following components: ① metal outer cup (requires ③ acetabular screw or does not require ③ acetabular screw) (hereinafter refe...

AI Technical Summary

Problems solved by technology

However, such joint prosthesis for complex hip muscle laxity or damaged diseases, such as cerebral palsy, hemiplegia, sequelae of poliomyelitis, and extensive gluteus medius injury, etc., such as traditional hip replacement, the postoperative dislocation rate very high

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