[The concept, clinical design and transfer application of target restoration space]

Abstract

The target restoration space (TRS) is a required tooth space that should be occupied by an esthetically formed and optimally functioned crown, veneer, or other fixed restoration. It can be either internal of or external of a tooth. Since minimal invasive can't be achieved without a minimal TRS, a precise preparation of slightest damage should conform to the transfer guide based on TRS. This paper introduces the concept, design of TRS, explains how it can be applied in tooth preparation, and helps to better understand a precise and minimal invasive tooth preparation technique.

图 1. TRS的分类

Fig 1 Types of TRS A：牙体空间；B：TRS；C：ITRS；D：ETRS；E：MTRS。

图 2. 三向分层转移导板

Fig 2 Three dimension and stratified transfer guide A：唇腭向指示导板；B：切方指示导板；C：分层导板。

图 3. 戴入唇腭侧指示导板并进行牙体预备

Fig 3 Labial guide setting and restoration space preparation A：戴入唇侧指示导板；B：使用牙周探针测定预备空间；C：根据导板制备引导沟；D：制备均匀的唇侧修复空间。

图 4. 戴入切端指示导板并进行牙体预备

Fig 4 Incisal guide setting and restoration space preparation A：使用导板指示切方空间；B：根据导板制备引导沟；C：制备均匀的切端空间。

图 5. 戴入舌侧指示导板并进行牙体预备

Fig 5 Lingual guide setting and restoration space preparation A：根据导板制备均匀的舌侧空间；B：完成的预备体。