[Clinical criteria for the assessment of dental restoration].

It is necessary to adopt a standard assessment system to evaluate the quality of restorations in clinical trials on operative dentistry. A new clinical assessment system for dental restorations was proposed in 2007. The crireria is based on three categories (aesthetic, functional and biological) among which includes 16 indexes such as restoration fractures and retention, surface luster, marginaladaptation, secondary carious, postoperative sensitivity and so on. It has been officially approved by World Dental Federation (FDI). Due to the practicability, sensitivity and standardization, more and more clinical trials use FDI criteria to assess the quality and longevity of dental restorations.