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.