title: Materials for chairside CAD/CAM-produced restorations.
abstract: BACKGROUND
  and Overview. Although the use of computer-aided design/computer-aided manufacturing (CAD/CAM) seems to be a recent addition to the dental restorative armamentarium, this concept was first investigated more than 35 years ago. CEREC (Sirona Dental Systems GmbH, Bensheim, Germany) was the first and is the only available chairside system, and it has more than 20 years of use in the dental office. The initial concept had three tenets: esthetic ceramic reconstruction, a single patient visit and minimal tooth reduction (inlays and onlays instead of crowns). The author reviews the materials used for CAD/CAM-fabricated restorations. The structure, properties and clinical success of the materials for full-contour chairside restorations, as well as laboratory-based high-strength all-ceramic restorations are presented.
  
  
  RESULTS
  CAD/CAM restorations have demonstrated clinical success owing to a combination of improvements in materials with advances in CAD/CAM systems. Full-contour ceramic restorations fabricated chair-side may reinforce the tooth, providing good long-term clinical success. High-strength milled restorations allow for the use of all-ceramic restorations for multiple-unit posterior and anterior bridges.
  
  
  CONCLUSIONS
  Examination of the structure, properties and clinical results of CAD/CAM materials supports their use in routine dental practice.
authors.affiliation: Department of Restorative Sciences and Biomaterials, Boston University, MA 02118, USA. rgiord@bu.edu
authors.forename: Russell
authors.initials: R
authors.lastname: Giordano
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D017076:Computer-Aided Design; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans; D015040:Zirconium / Q000737:chemistry*
chemical_list: D003764:Dental Materials; C074543:Cerec; D015040:Zirconium; C028541:zirconium oxide