[Research status of tooth preparation quantitative guide technique].

Tooth preparation is a basic operation in prosthodontics treatment and the quality of preparation influences the effect of treatment directly. How to achieve a precise and quantitative tooth preparation is always one of the main aims of dental prosthodontics. The known types of tooth preparation guide technique can be divided into visual guidance, passive constraint guidance and active constraint guidance (automated tooth preparation), respectively represented by silicon rubber index, tooth preparation guide plate and computerized numerical control cutting system (CNC cutting system). Studies in advanced manufacturing technologies such as robot systems and numerical control ultra-short pulse laser (USPL) have also been reported recently. This review comprehensively introduced tooth preparation quantitative guide techniques and partially summarized the application effects and limitations to provide reference for relative researches and clinical application.牙体预备是口腔修复治疗的基本操作，预备体的质量直接影响修复治疗的效果。如何实现精确定量的牙体预备，一直是口腔修复的主要研究目标。目前，牙体预备定量引导技术主要分为视觉引导、被动约束引导和主动约束引导（自动化牙体预备）3大类，分别以硅橡胶寄存记录法、牙体预备导板和计算机数控切削系统为代表，引导精度逐级增加。近年，学者们也开始探索将机器人系统、数控超短脉冲激光等先进制造技术应用于自动化牙体预备领域。本文归纳总结各类牙体预备定量引导技术的研究现状，并探讨其应用效果及其局限性，以期为相关研究与相关方法的临床选择应用提供参考。.