title: Crowns and other extra-coronal restorations: try-in and cementation of crowns.
abstract: Having successfully negotiated the planning, preparation, impression and prescription of your crown, the cementation stage represents the culmination of all your efforts. This stage is not difficult, but a successful outcome needs as much care as the preceding stages. Once a restoration is cemented there is no scope for modification or repeat You have to get it right first time. Decemented crowns often have thick layers of residual cement suggesting problems with either initial seating or cement handling. When the fate of restorations costing hundreds of pounds depends on correct proportioning of cements and the quality of the mix, the value of a well-trained and experienced dental nurse is easy to see. Both dentist and nurse need a working knowledge of the materials they are handling.
authors.affiliation: Department of Restorative Dentistry, The Dental School, Newcastle upon Tyne. R.W.Wassell@newcastle.ac.uk
authors.forename: R W
authors.initials: RW
authors.lastname: Wassell
authors.forename: D
authors.initials: D
authors.lastname: Barker
authors.forename: J G
authors.initials: JG
authors.lastname: Steele
mesh_terms: D002484:Cementation / Q000379:methods; D003442:Crowns / Q000191:economics; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry / Q000145:classification; D017005:Dental Debonding; D003766:Dental Occlusion; D003775:Dental Polishing; D017267:Dental Prosthesis Design; D004955:Esthetics, Dental; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D011076:Polycarboxylate Cement / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D013499:Surface Properties; D019231:Tooth Preparation, Prosthodontic; D016896:Treatment Outcome; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: D003738:Dental Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; D019279:Resin Cements; D015036:Zinc Phosphate Cement