title: Restorative dentistry and restorative materials over the next 20 years: a Delphi survey.
abstract: OBJECTIVE
  The aim of this study was to forecast trends in restorative dentistry over the next 20 years and to identify treatment goals and corresponding properties of restorative materials.
  
  
  METHODS
  Using the Delphi method, a panel of 3 experts identified 8 key questions, which were sent to experts in restorative and preventive dentistry. In round 1 of this survey, 15 international experts devised a clearer semantic definition of the key questions and the completion of respective items for two additional rounds. In round 2, 125 experts from 35 countries rated the items developed in round 1 using a Likert scale. In round 3, the same 125 experts received the ratings of round 2 and were asked to agree or disagree to these ratings by re-voting on all key questions and items. A total of 105 experts re-voted and finally took part in the complete survey. Among the 8 key questions, two questions were selected for the present report: (Q1) "What will be the future role of restorative treatment?" and (Q6) "What will be the key qualities for clinical success of restorations?" For both questions and the respective items, the experts were asked to evaluate the importance and the feasibility for later calculation of the scientific value (i.e. the opportunity, where opportunity=importance+[importance-feasibility]).
  
  
  RESULTS
  The three items of highest importance for Q1 were "preservation of existing enamel and dentin tissue," "prevention of secondary caries," and "maintenance of the pulp vitality," and for Q6 they were "optimization of adhesion," "biocompatibility," and "minimizing technical sensitivity."
  
  
  CONCLUSIONS
  Bioactivity toward the pulp-dentin complex and prevention of secondary caries were the items generally rated as having the highest opportunity.
authors: Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; DENTSPLY DeTrey, Konstanz, Germany. Electronic address: rainer.seemann@zmk.unibe.ch.
authors: Rainer
authors: R
authors: Seemann
authors: Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland.
authors: Simon
authors: S
authors: Flury
authors: DENTSPLY DeTrey, Konstanz, Germany.
authors: Frank
authors: F
authors: Pfefferkorn
authors: Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland.
authors: Adrian
authors: A
authors: Lussi
authors: Department of Operative Dentistry, School of Dentistry, University of Cologne, Cologne, Germany.
authors: Michael J
authors: MJ
authors: Noack
mesh_terms: D003697:Delphi Technique; D003764:Dental Materials; D003793:Dental Restoration, Permanent / Q000639:trends*; D005544:Forecasting; D006801:Humans
chemical_list: D003764:Dental Materials
keywords: Antibacterial; Dental restorations; Dentinogenesis; Pulp-dentin regeneration; Resin-based dental materials; Secondary caries inhibition