Longitudinal Study of Repaired or Replaced Dental Restorations

The purpose of this project is to use data from the DPBRN study of replacement restorations to assess how defects that may lead to failure develop over time, and to follow restorations placed in a practice-based setting for up to three years.

The specific aims are to:

1. quantify the annual and 3-year incidence of defects and replacement rates on restorations inserted as replaced restorations;

2.test the hypothesis that directly-placed composite restorations have a significantly higher 3-year incidence of defects and significantly higher replacement rate after 3 years compared to amalgam restorations;

3.test the hypothesis that there is no significant difference in 3-year replacement rates between restorations inserted that were partially replaced as compared to restorations that were completely replaced during DPBRN study of replaced restorations; and

4.test the hypothesis that the 3-year replacement rate of restorations in permanent teeth of adolescents is significantly higher than that of restorations in adults.

Recall frequency will be according to the schedule used in the practice where the restoration was placed. Patients will have been informed about the follow-up study as part of the informed consent procedure. If a patient seeks treatment in a different practice, informed consent will include permission to contact that practice for information related to restoration(s) in DPBRN longitudinal study.