Altered-cast technique contributes to many types of methods, and each method has pros and cons.This research aims to describe the application of the altered-cast technique.

• 修正模型技巧是利用两次印模的方式，将牙齿和牙龈的相对关系正确的取得，修正模型技巧的作法有很多种，各有其优缺点。