Novel retention device of craniofacial and maxillofacial prosthesis

Abstract

The invention relates to a novel retention device of craniofacial and maxillofacial prosthesis. The novel retention device comprises an implant body, a connecting body, a base table and an armature. Threads are arranged outside the implant body, a cylinder is arranged at the center of the upper portion, and threads are arranged on the upper portion of the cylinder. A hole is arranged at the center of the connecting body, a cutting groove is arranged on the upper portion of the connecting body, and screw holes are arranged on lugs on two sides of the cutting groove. A protruding block matched with the cutting groove of the connecting body is arranged on the lower portion of the base plate, a hole is arranged on the protruding block, and a screw hole is arranged at the center of the upper portion of the base table. The armature is cylindrical, and a screw is arranged at the center of the lower portion of the armature. The connecting body fastens the threads of the cylinder on the upper portion of the implant body through a nut and is connected with the implant body and connected with the base table through the screw, and the armature is arranged on the base table through the screw. The implant body can be implanted into an adjacent bone area with rich bone quantity in inclined mode, implanting length of the implant body can be increased, and the implant body is fixed and stable. Simultaneously, the problem that lateral retention force of prosthesis of an ear and a nose is not enough due to the fact that magnetic adhesion bodies of various implant bodies are parallel is solved. Possible problems such as intracranial damage caused by implanting of a retention implant body of ear prosthesis are solved, and long-term stability of the implant body is guaranteed.

Description

technical field [0001] The invention relates to a retention device for repairing craniomaxillofacial defects, in particular, the upper structure (connector and abutment) of the retention device can freely adjust the angle relative to the lower structure (implant) of the retention device , the retention device can be used for the retention of various prosthetics such as ears, noses and eyes. Background technique [0002] Cranio-maxillofacial defects caused by congenital development, tumors and trauma are common clinical diseases, which bring serious physical and mental harm to patients, and at the same time bring challenges to clinical restoration and reconstruction. Cranio-maxillofacial defects, especially defects in the ear, nose and eyes, will affect the shape and function of the patient's face. Clinical repair methods can be divided into two categories: autologous tissue and allogeneic tissue. The autologous tissue method uses various tissue flaps (skin flaps, myocutane...

AI Technical Summary

Problems solved by technology

There are following disadvantages with implant-retained prosthesis: 1. implant surgery has certain risk

2. Implants may loosen and fall off

3. If the artificial ear is retained by magnetic attachments, because the directions of the implants are roughly parallel, the magnetic attachments are insufficient to resist the lateral force and the artificial ear is easy to slide, but the magnetic attachments can maintain the retention force for 4-8 years It does not disappear; if the prosthetic ear is retained by a bar-type attachment, the bar-type attachment can ensure lateral and axial retention at the same time, but the bar-type may become loose and poorly retained due to the fatigue of the friction material after repeated removal and wear. Its life span is about one year and needs to be replaced periodically

[0008] There are no good solutions for the above-mentioned prosthesis retention problems in the ear, nose, eye and other parts, and there is no good solution in the literature or patents at home and abroad.

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