Biological prosthesis for shaping nasal recess

Abstract

The invention discloses a biological prosthesis for shaping a nasal recess. The biological prosthesis comprises a bony interface layer in contact with a maxillofacial bone, a soft tissue interface layer in contact with soft tissue, and a prosthesis main body structure. The overall structure of the prosthesis is in an elliptic arc crescent shape, and the thickness of the prosthesis is gradually increased from top to bottom. A smooth transition fillet is arranged on the surface away from the nasal side, the prosthesis is seamlessly attached to the maxillofacial bone, a barb structure and an interference structure are arranged on the contact surface to achieve the self-fixing effect of the prosthesis, and the design of the bony interface layer and the soft tissue interface layer facilitates apore structure where bone and soft tissue grow in. According to the invention, the problem of maxillofacial deformity repair caused by nasal substrate recession can be effectively solved, the postoperative facial aesthetic effect and satisfaction of a patient are improved, the stability of the implanted prosthesis is improved, and the service life of the implanted prosthesis is prolonged.

Description

technical field [0001] The invention belongs to the technical field of biomedical devices, and in particular relates to a biological prosthesis for sculpting a paranasal depression. Background technique [0002] Depression and flattening of the paranasal area in the middle of the face is a common malformation of the oral and maxillofacial region, especially those with Angle class III. Relationships are the most common, not only affecting chewing, pronunciation and other functions, but also seriously affecting the patient's appearance and physical and mental health. According to the fourth oral epidemiological survey, the incidence of malocclusion is 60% to 73%. Among them, the correction of paranasal deformity is the most complicated and has become an urgent problem to be solved. [0003] For the repair of the depression in the paranasal area, the clinical methods used include: [0004] (1) Injection of autologous tissue and hyaluronic acid to fill the sunken area has the...

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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