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Survival of Dicor glass-ceramic dental restorations over 16 years. Part III: Effect of luting agent and tooth or tooth-substitute core structure

2001; Elsevier BV; Volume: 86; Issue: 5 Linguagem: Inglês

10.1067/mpr.2001.119415

1097-6841

Kenneth A. Malament, S. S. Socransky,

Dental Research and COVID-19

Abstract Statement of Problem. The influence of different types of restorative design features on the long-term survival of Dicor glass-ceramic restorations is only partially understood. Purpose. This study examined the effect of different types of luting agents and preparation core structures on the survival of Dicor glass-ceramic restorations functioning in vivo. Material and Methods. A total of 1444 Dicor glass-ceramic restorations were placed on the teeth of 417 adults. Failure was defined as a restoration that required remake because of material fracture. The survival of restorations of different types, with different luting agents and preparation core structures, was described with Kaplan-Meier survival functions. The significance of differences in survival between different tooth or tooth-substitute preparation core structures and different luting agents was determined with the log-rank test. Results. The probability of survival of a typical acid-etched Dicor restoration luted to gold preparation core structures was 91% at 16 years compared with 75% for dentin preparation core structures ( P <.01). The survival of acid-etched Dicor restorations luted to dentin preparations was significantly better than nonacid-etched restorations luted to dentin. Acid-etched Dicor restorations luted with resin composite exhibited a more favorable survival function than those luted with glass ionomer ( P <.01) and zinc phosphate ( P <.05). Differences between restorations luted with glass ionomer or zinc phosphate agents were not significant. Conclusion. Acid-etched Dicor restorations luted to gold preparation core structures exhibited significantly better intraoral survival than restorations luted to dentin. Acid-etched Dicor restorations survived better than nonacid-etched restorations when luted to dentin preparations. Acid-etched Dicor restorations luted with resin composite exhibited more favorable survivor functions than restorations luted with glass ionomer or zinc phosphate agents. (J Prosthet Dent 2001;86:511-19.)