A biological prosthesis for shaping paranasal depression

Abstract

The invention discloses a biological prosthesis for shaping paranasal depression, which comprises a bony interface layer in contact with maxillofacial bone, a soft tissue interface layer in contact with soft tissue, and a main body structure of the prosthesis; the overall structure of the prosthesis is an elliptical arc Crescent shape, the thickness gradually increases from top to bottom, with a smooth transition fillet on the surface away from the nasal side, the prosthesis fits seamlessly with the maxillofacial bone, and barb structures and interference structures are provided on the contact surface to realize the self-prosthesis of the prosthesis. Fixation, the design of bony interface layer and soft tissue interface layer is conducive to the pore structure of bone and soft tissue growth; the present invention can effectively solve the problem of repairing maxillofacial deformity caused by paranasal base depression, and improve the postoperative facial aesthetic effect of patients and satisfaction, and improve the stability and service life of the prosthesis after implantation.

Description

technical field [0001] The invention belongs to the technical field of biological medical devices, and in particular relates to a biological prosthesis for shaping paranasal depressions. Background technique [0002] The depression and flattening of the paranasal area in the middle of the face is a common deformity in the oral and maxillofacial region, especially those with Angle III It not only affects functions such as chewing and pronunciation, but also seriously affects the patient's appearance and physical and mental health. According to the fourth oral epidemiological survey, the incidence rate of malocclusion is 60% to 73%, among which the correction of paranasal deformity is the most complicated and has become an urgent problem to be solved. [0003] For the repair of paranasal depression, the clinical methods are as follows: [0004] (1) Injection of autologous tissue and hyaluronic acid to fill the depressed area has the advantages of convenient operation and le...

AI Technical Summary

Problems solved by technology

[0004] (1) Injection of autologous tissue and hyaluronic acid to fill the depressed area has the advantages of convenient operation and less trauma, but the repair effect is not good due to problems such as self-absorption and difficulty in forming;

[0005] (2) Autologous bone or allogeneic bone repair, but there are problems such as limited bone source, difficult shaping and uncertain absorption rate;

[0006] (3) Biomaterial restoration, such as silica gel, polyethylene (MedPor products in the United States), hydroxyapatite, etc., but serially designed prostheses are still difficult to match the individual needs of patients, and there is a risk of loosening and displacement

[0007] Therefore, in view of the problems existing in the above-mentioned existing repair technology, the present invention proposes a personalized prosthesis design and manufacturing method for paranasal depression plasticity, based on the advantages of 3D printing technology and PEEK matrix and its composite materials, through personalized structure The prosthesis with a high degree of fit is designed to solve the problems of self-absorption, difficulty in forming, loosening and displacement in existing repair methods, improve the postoperative facial aesthetics and satisfaction of patients, and improve the medium and long-term stability of the prosthesis and service life

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