Abstract: Target restoration space (TRS) is the most precise space required for designing optimal prosthesis. TRS consistsof an internal or external tooth space to confirm the esthetics and function of the final restoration. Therefore, assisted withquantitive analysis transfer, TRS quantitative analysis is a significant improvement for minimum tooth preparation. This articlepresents TRS quantity-related measurement, analysis, transfer, and internal relevance of three TRS classifications. Resultsreveal the close bond between precision and minimally invasive treatment. This study can be used to improve the comprehensionand execution of precise esthetic prosthodontics.

Key words: target restoration space, quantity and quantitive relation, precise prosthodontics, tooth preparation