title: A 3-year clinical study of tunnel restorations.
abstract: Tunnel restorations (n = 161) performed by 4 dentists were evaluated after a mean of 35 months in situ. Demineralized enamel was to be spared during preparation. The preparations were filled with a cermet glass ionomer (polyalkenoate) cement. Evaluation was carried out using clinical and radiographical criteria. During the observation period, approximately 16% of the restorations were replaced due to caries in dentin and 14% due to marginal ridge fracture. Cavitation in the approximal surface and/or increased radiolucency of the approximal enamel were observed in 34% of the remaining tunnel-restored teeth. A significantly higher frequency of failures were registered when treating patients with a high caries activity, where the initial lesion was large, and where the restoration did not reach the approximal surface.
authors.affiliation: Department of Cariology and Endodontics, University of Bergen, Norway.
authors.forename: G V
authors.initials: GV
authors.lastname: Strand
authors.forename: H
authors.initials: H
authors.lastname: Nordbø
authors.forename: A B
authors.initials: AB
authors.lastname: Tveit
authors.forename: I
authors.initials: I
authors.lastname: Espelid
authors.forename: K
authors.initials: K
authors.lastname: Wikstrand
authors.forename: G E
authors.initials: GE
authors.lastname: Eide
mesh_terms: D000293:Adolescent; D000328:Adult; D016722:Cermet Cements / Q000737:chemistry; D002648:Child; D003731:Dental Caries / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy; D003733:Dental Caries Susceptibility; D003737:Dental Cavity Preparation / Q000145:classification; D003743:Dental Enamel / Q000000981:diagnostic imaging / Q000648:ultrastructure; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000145:classification*; D003804:Dentin / Q000473:pathology; D018450:Disease Progression; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006801:Humans; D016015:Logistic Models; D016300:Radiography, Bitewing; D019233:Retreatment; D013499:Surface Properties; D017001:Tooth Demineralization / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy
chemical_list: D016722:Cermet Cements