残根残冠桩核一体化修复体切削成型用多向纤维增强复合材料的研制

THE MULTI-DIRECTIONAL FIBER-REINFORCED COMPOSITE MATERIALS USED FOR PREPARATION OF INTEGRATED POST-AND-CORE PRODUCTS TARGETING FOR RESIDUAL ROOTS AND CROWNS RESTORATION

采用桩核修复技术对牙体残根残冠缺损进行修复是口腔修复中的重要治疗方法。通过整合修复体的CAD数字模型、一体化纤维桩的应力有限元分析等,指导完善桩核材料的结构设计,并通过多向纤维增强复合材料的成型加工技术研究,完成了用于残根残冠桩核一体修复的可切削多向纤维增强复合材料的制备,基于CAM数字化精密加工,实现了桩核一体修复体的精确化和个性化制备。

It is important to use post and core restoration techniques to repair the residual tooth crown and root in the treatment of oral rehabilitation. The study on developing a kind of multi-directional fiber-reinforced composite materials used for preparation of integrated post-and-core products was proposed and performed. At first, two kinds of multi-directional fiber reinforcing design were supposed. And finite element analysis was applied to assess stress distribution throughout post-and-core and tooth root with the aid of dental CAD digital model, by which muhi-directional fiber reinforcing design was optimized. Secondly, the processing parameters and machines were modified, namely pultrusion-winding technique, to produce the multi-directional FRC materials successfully. At last, basing on an oral CAD/CAM system,integrated FRC post-and-cores were machined. According to macro- and microscopical observation, the final products demonstrated prospective properties and further application in clinic practices.