title: Tunnel restorations. A 3 1/2-year follow up study of Class I and II tunnel restorations in permanent and primary teeth.
abstract: During 1988-89, 224 patients with approximal caries in the premolar/molar regions were provided with 318 tunnel restorations. In case of perforation of the enamel in the enamel/dentin border, (23%), complete Class II-tunnel restorations with glass ionomer cement and composite resin were made. In case of "intact" enamel, (77%), partial Class I-tunnel restorations were made. The restorations were controlled at annual routine recalls and the success rate after 3 1/2 years was 74% for permanent teeth, and 10% for primary teeth. Restorations in permanent teeth, made during the second year of the study were successful in 82%, as compared with 62% for restorations made during the first year, indicating a learning effect. Failures in the permanent dentition were due to marginal ridge fracture (35%), cavitation in the approximal enamel (31%), and recurrent caries (38%). Failures in primary teeth were predominantly due to marginal ridge fractures (84%). A comparison with the longevity of conventional Class II restorations is made and the possible advantages of the present method are presented.
authors.affiliation: Public Dental Service, Visby, Sweden.
authors.forename: L
authors.initials: L
authors.lastname: Hasselrot
mesh_terms: D000293:Adolescent; D000328:Adult; D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate; D016722:Cermet Cements; D002648:Child; D002675:Child, Preschool; D003188:Composite Resins; D003731:Dental Caries / Q000628:therapy; D003737:Dental Cavity Preparation / Q000379:methods*; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000379:methods*; D003804:Dentin; D005500:Follow-Up Studies; D005899:Glass Ionomer Cements; D006801:Humans; D008963:Molar; D010043:Outcome and Process Assessment, Health Care; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D014082:Tooth Fractures / Q000209:etiology; D014094:Tooth, Deciduous
chemical_list: D016722:Cermet Cements; D003188:Composite Resins; D005899:Glass Ionomer Cements; D011109:Polymethacrylic Acids; D011140:Polyurethanes; C074807:BaseLine dental cement; D017438:Bisphenol A-Glycidyl Methacrylate; C046503:formula F 70