title: Leucite-reinforced glass ceramic inlays and onlays after six years: clinical behavior.
abstract: Ceramic inlays are an esthetic substitute for large amalgam and other metallic restorations. This controlled clinical study evaluated the performance of IPS Empress inlays and onlays with cuspal replacements and proximal margins below the cementoenamel junction over six years of clinical service. Six dentists placed 96 ceramic restorations in 34 patients. Luting was accomplished using the enamel-etch-technique, a dentin bonding system (Syntac Classic) and four different composite systems. The restorations were assessed by two calibrated investigators using modified USPHS criteria at baseline (96 restorations), one (96), two (95), four (89) and six years (67). Seven of the 96 restorations investigated had to be replaced (failure rate 7%; Kaplan-Meier): Five inlays suffered cohesive bulk fractures and two teeth required endodontic treatment. After six years of clinical service, significant deterioration (Friedman 2-way ANOVA; p < 0.05) was found for marginal adaptation of the remaining restorations. Ninety-four percent of the surviving restorations exhibited marginal deficiencies, independent of the luting composite. Neither the absence of enamel margins, nor cuspal replacement significantly affected the quality of the restorations.
authors.affiliation: Policlinic for Operative Dentistry and Periodontology, University of Erlangen-Nuremberg, Glueckstrasse 11, D-91054 Erlangen, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Frankenberger
authors.forename: A
authors.initials: A
authors.lastname: Petschelt
authors.forename: N
authors.initials: N
authors.lastname: Krämer
mesh_terms: D000134:Acid Etching, Dental; D000328:Adult; D000538:Aluminum Silicates / Q000737:chemistry*; D000704:Analysis of Variance; D002484:Cementation; D002516:Ceramics / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D003743:Dental Enamel / Q000648:ultrastructure; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005260:Female; D005500:Follow-Up Studies; D005898:Glass / Q000737:chemistry*; D006801:Humans; D007284:Inlays; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D019279:Resin Cements / Q000737:chemistry; D018709:Statistics, Nonparametric; D013499:Surface Properties; D016019:Survival Analysis; D019237:Tooth Cervix / Q000033:anatomy & histology
chemical_list: D000538:Aluminum Silicates; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C075815:IPS-Empress ceramic; D019279:Resin Cements; C078484:Syntac dentine adhesive; D003776:Dental Porcelain; C078519:leucite