Muscle function preservation type all-temporal lower joint prosthesis

Abstract

The invention provides a muscle function preservation type all-temporal lower joint prosthesis which at least comprises an articular fossa piece and an articular head piece abutting against the articular fossa piece. The articular head piece comprises a lower jaw rear edge fixing plate, a Z-shaped incisura fixing plate and a joint head part; the lower jaw rear edge fixing plate is connected with the lower end of the joint head part, extends downwards, is of a plate-shaped structure and comprises a lower jaw rear edge surface fitting surface; the Z-shaped incisura fixing plate protrudes out ofone side of the lower jaw rear edge fixing plate, extends in the direction far away from the lower jaw rear edge fixing plate, is of a plate-shaped structure and comprises a lower jaw ascending and supporting second incisura portion attaching face. The prosthesis can effectively repair the normal anatomical structure of the temporal-mandibular joint, preserve attachment of normal extraprandial muscles and occlusal muscles, recover the functions of chewing, speaking, movement and the like of a patient, solve the problems of postoperative mandibular deflection and chewing weakness of the patient, is more precise and smaller in design, reduces operation wounds, shortens operation time and reduces operation difficulty.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a total inferior temporal joint prosthesis with muscle function preservation. Background technique [0002] The temporomandibular joint is the only joint in the maxillofacial region that moves left and right. It has rotational and sliding movements. Its anatomy and movement are one of the most complex joints in the human body. Temporomandibular joint disease is a common and frequently-occurring disease. Its main manifestations are pain in the joint area, limited mouth opening, occlusal disorder, mandibular movement and dysfunction, etc., which seriously affect the patient's chewing, language and other functions, and even endanger the patient's life. . Advanced temporomandibular joint osteoarthropathy, severe idiopathic condylar resorption, ankylosis, comminuted fractures, and some joint tumors need to resect the diseased joint, and use autologous or allogeneic tissue to reconstruc...

AI Technical Summary

Problems solved by technology

At present, the international mainstream products are standard Zimmer Biomet and customized TMJ Concepts; these two prostheses are rarely used in China because they are not suitable for Chinese joint structures and expensive (70,000-150,000 RMB / side).

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