颜面赝复体阴模三维打印成形的初步研究

目的 探讨三维打印在颜面赝复体阴模自动化加工中的可行性.方法 选取鼻数据库中鼻数字化模型1个,利用Magics RP软件生成立体成型格式的鼻阴模.通过三维打印加工鼻石膏模型和鼻阴模石膏模型.将硅橡胶充填于鼻阴模石膏模型中,获得鼻硅橡胶模型.采用结构光三维测量系统扫描鼻石膏模型和硅橡胶模型,进行偏差分析.结果 鼻石膏模型和硅橡胶模型的最大正偏差为0. 98 m,位于鼻尖;最大负偏差为-0. 64 mm,位于鼻小柱;均值为0.17 mm.结论 颜面赝复体阴模直接快速成形具有可行性.

A preliminary study on the cavity forming of the facial prostheses based on three dimensional printing

Objective To investigate the feasibility of applying three-dimensional printing in the fabrication of facial prostheses cavity. Methods The computer aided design(CAD) model of negative mold of a nasal prosthesis was generated with Magics RP software according to an existed CAD model of the positive pattern of nasal prosthesis( STL file). The negative mold and positive pattern of the nasal prosthesis were fabricated by three dimensional printing. The actual nasal prosthesis was produced by pouring silicon into the negative mold. The actual nasal prosthesis and rapid prototyping (RP) fabricated positive pattern were both scanned with a three-dimensional scanning system. Quantitative measurements of registration errors were calculated to evaluate the surface matching degree between the two models. Results The max positive error between the models of the actual silicon nasal prosthesis and the RP-fabricated positive pattern was 0. 98 mm. It was located at the apex nasi area, and the max negative error was - 0. 64 mm. Conclusions Facial prostheses cavity direct three dimensional printing can be one of the methods for automated fabrication of the facial prostheses.