计算机辅助设计与制作修复牙体大面积缺损研究及进展
2018-09-25孙振李娜崔晓娜
孙振 李娜 崔晓娜
【摘要】 牙体组织较大范围缺损在临床上多以桩冠或全冠方式修复。但对于牙龈距离小、咬合紧、根管细小弯曲或明显钙化的病例,传统修复方式会出现修复体脱落、根裂导致修复失败,且牙体预备量大,与微创修复理念不符。计算机辅助设计与制作全瓷修复系统的问世,以精确的软件系统,可靠的硬件设备及稳定的粘接系统,实现了修复体洞型设计与树脂黏接剂的合理配合,为牙体组织大面积缺损的病例提供了全新修复方式。本文将对计算机辅助设计与制作修复牙体大面积缺损的优势、修复体材料、数字化光学模型制取及修复体粘接做一综述。
【关键词】 计算机辅助设计与制作; 牙体缺损; 综述
doi:10.14033/j.cnki.cfmr.2018.18.085 文献标识码 A 文章编号 1674-6805(2018)18-0-03
Research and Progress on Large Area Defect Repair of Dental Body by CAD/CAM Side Chair/SUN Zhen,LI Na,CUI Xiaona,et al.//Chinese and Foreign Medical Research,2018,16(18):-186
【Abstract】 Most of the defects in dental tissue are repaired by post crown or full crown in clinic.However,for cases with small gingival distance,tight occlusion,small root canal curvature or obvious calcification,traditional repair methods will cause failure of repair,failure of root fracture,and large volume of tooth preparation,which is not consistent with the concept of minimally invasive repair.The advent of computer-aided design and manufacture of all ceramic restoration system,reliable and stable hardware bonding system,to achieve a reasonable fit restoration cavity design and resin,provides a new way for the repair of cases of tooth tissue defect.This article will review the advantages,materials,optical models,and bonding of computer aided design and production for repairing large defects in the teeth.
【Key words】 Computer aided design and production; Tooth defect; Overview
First-authors address:Department of Stomtology,Weifang Medical University,Weifang 261053,China
齲坏、外伤、磨损等原因造成的牙体缺损在临床上较为常见。常规治疗可选用直接充填,而对于牙体组织大面积缺损的患牙,经过完善的根管治疗后,为获取更好的力学支持以行使其正常功能,以往全冠修复,但其牙体预备量大,常到达牙体组织的40%以上,若采用此种方式将会使得牙体结构丧失70%左右[1-2],这与尽量保留余留牙体组织的基本原则不符。在剩余牙体组织足够的情况下,采用计算机辅助设计与制作的牙体修复方式更有优势,尤其是牙体组织大面积的缺损,减少过多切割牙体硬组织、修复体对余留牙体组织的压应力、牙周组织的刺激,利用髓腔空间及黏接剂,为修复体、余留牙体组织提供可靠的固位力和抗力。……
