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Method for forming complete mandible prosthesis with variable-density porous structure

A porous structure and mandible technology, applied in prosthesis, bone implants, medical science, etc., can solve the problem of inability to clearly display the structure and positional relationship of the mandibular condyle, articular disc and glenoid fossa, and the inability to accurately conduct bone stress Control, unsatisfactory mandibular joint fit and other problems, to achieve the effect of improving structural accuracy and morphological accuracy, reducing prosthesis weight, and comprehensive biomechanical performance parameters

Active Publication Date: 2020-10-13
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

The three-dimensional model of the printed titanium alloy mandibular prosthesis is mainly derived from CT scan data. These data cannot clearly show the structure and positional relationship of the mandibular condyle, articular disc and glenoid socket. The formed prosthesis fits the patient's mandibular joint Not ideal; the biomechanical model information comes from the standard model or other normal mandibular structures, which cannot fully reflect the stress on the patient's own mandible; in order to reduce the weight of the prosthesis, a lattice hollow + skin structure is adopted, and a uniform lattice structure cannot Precisely control the stress conduction of the bone, and the sealed skin cannot allow the implantation and growth of muscles and nerves

Method used

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  • Method for forming complete mandible prosthesis with variable-density porous structure

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The present invention is a method for forming a full mandibular prosthesis with a variable density porous structure, (1) for the damaged mandible, respectively obtain head CT and MRI data, and respectively establish a three-dimensional model of mandibular bone structure and mandibular articular cartilage and ligaments , 3D model of muscle tissue; after 3D image fusion and mirror repair, a complete 3D reconstruction model of the full mandible was obtained; (2) According to the MRI data of the head, the attachment point and fiber direction of the mandibular muscle were obtained; On the basis of the reconstructed model, a biomechanical model of the mandible was established, and the stress distribution of the mandible was obtained through finite element analysis; (3) According to the stress distribution of the mandible in step (2), ...

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Abstract

The invention discloses a method for forming a complete mandible prosthesis with a variable-density porous structure. For an injured mandible, head CT and MRI data are obtained respectively, and a three-dimensional model of a mandible bone structure and three-dimensional models of articular cartilage, ligament and muscle tissue of the mandible are respectively established; through three-dimensional image fusion and mirror repair, a complete three-dimensional reconstruction model of the mandible is obtained; the stress distribution of the mandible is obtained; according to the stress distribution of the mandible, the three-dimensional model of the mandible bone structure is taken as an object of optimization design, a circular hole is taken as a filling unit, a topology optimization designis carried out, and finally a complete mandible prosthesis model with a variable-density porous structure is obtained; and titanium alloy powder is processed, cleaning, annealing heat treatment, wirecutting and de-supporting, sandblasting and polishing treatment are carried out, and the final complete mandible prosthesis with the variable-density porous structure is obtained. The variable-densityporous structure obtained by the method is closer to the mechanical properties of natural bones, and the biocompatibility is better.

Description

technical field [0001] The invention relates to a method for forming a full mandibular prosthesis with variable-density porous structure, and belongs to the technical field of artificial metal bone formation. Background technique [0002] The mandible is located in the middle and lower third of the face. Together with the maxilla, it forms and maintains normal chewing and language functions. It is the only movable bone in the face, and its anatomical shape and position are special. Segmental defects of the mandible caused by congenital deformities, tumor resection, trauma, etc., result in the destruction of the integrity and continuity of the mandible, which not only causes functional obstacles such as chewing and swallowing, but also easily leads to facial deformities. , It is necessary to restore the function and appearance through repair and reconstruction. At present, for large-scale segmental defects of the mandible, especially for defects of any length on one side of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/28
CPCA61F2/2803A61F2/30942A61F2/3099A61F2002/30006A61F2002/30906A61F2002/3093A61F2002/30784A61F2002/30948Y02P10/25
Inventor 于永泽何江涛董蓉桦王乐
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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