title: A cohort investigation of the changes in vocational dental practitioners' views on repairing defective direct composite restorations.
abstract: OBJECTIVE
  To investigate changes in vocational dental practitioners (VDPs) views on repairing direct composite restorations (DCRs) during the vocational training (VT) year 2002-2003.
  
  
  METHODS
  A questionnaire-based cohort study.
  
  
  METHODS
  Data on the repair of DCRs, including indications and details of operative techniques were collected by a questionnaire sent at the beginning of the VT year (September 2002) to all 12 Postgraduate Dental Deans in England. A follow-up questionnaire was sent to the Deans near the end of the VT year (May 2003). They were asked, on both occasions, to distribute the questionnaires among their VDPs and to return the completed questionnaires.
  
  
  RESULTS
  Ten deaneries participated in the study. The September 2002 and May 2003 findings (306 respondents [66%] and 313 respondents [67%] respectively) were analysed using Chi-square statistic and t-test to identify any significant differences (P<0.05). Significant changes in the attitudes of the VDPs during the VT year included a shift to viewing reduction in treatment time (30% to 48%), cost to patient (12% to 20%) and the management of the partial loss of a restoration (57% to 70%) as indications for repairs. In contrast, there was a significant change in viewing secondary caries as an indication for repair (46% to 29%). In addition, there was a significant, worrisome shift in relation to the use of bonding systems and finishing instruments, together with a reduction in the anticipated longevity of composite repairs.
  
  
  CONCLUSIONS
  Aspects of VDPs' attitudes to the repair of DCRs were found to change significantly during the VT year. Not all aspects of the changes observed were considered to be positive. Knowledge and understanding of repairs to DCRs need to be strengthened.
authors.affiliation: Division of Restorative Dentistry, Department of Oral & Dental Science, University of Bristol Dental School & Hospital, Lower Maudlin Street, Bristol BS1 2LY, UK. i.blum@ntlworld.com
authors.forename: I R
authors.initials: IR
authors.lastname: Blum
authors.forename: J T
authors.initials: JT
authors.lastname: Newton
authors.forename: N H F
authors.initials: NH
authors.lastname: Wilson
mesh_terms: D000288:Administrative Personnel; D001291:Attitude of Health Personnel; D015331:Cohort Studies; D003188:Composite Resins; D017269:Dental Prosthesis Repair; D003793:Dental Restoration, Permanent; D003814:Dentistry, Operative / Q000193:education*; D004499:Education, Dental, Graduate; D006801:Humans; D019239:Practice Patterns, Dentists'; D011231:Preceptorship; D011795:Surveys and Questionnaires
chemical_list: D003188:Composite Resins