The purpose of this study was to study the use of a Core Questionnaire that included several questions from each PBRN (DPBRN, PEARL, PRECEDENT - collectively know as CONDOR) that had been extracted from questionnaires previously administered as part of their initial research program activities. This protocol was the first administration of this core questionnaire with the purpose of assessing dental practice changes that may have occured since the earlier administration of the individual questions with the separate networks.It also collected baseline data for others.

The three dental PBRNs had a unique opportunity to measure the impact of research participation on potential changes in practice base of the research protocol. We were able to examine the effect of participation in research in general to the acceptance of research findings from other studies and the effect of association with but not participation in a research network.

Inclusion Criteria:

• DPBRN dentists and hygienists who had completed a DPBRN Enrollment questionnaire and for whom DPBRN had a current active address and who were currently licensed to practice
• reported on the Enrollment Questionnaire they were a general dentist, pediatric dentist, or dental hygienist, or reported doing at least some restorative dentistry procedures
• practiced in one of the five DPBRN regions (AL/MS, FL/GA, MN< PDA, or SK)

The questionnaire was administered to all DPBRN practitioner-investigators (including both dentists and hygienists) 22 years of age or older.