Effect of different luting materials on the marginal adaptation of Class I ceramic inlay restorations in vitro

Effect of different luting materials on the marginal adaptation of Class I ceramic inlay restorations in vitro Pages 264-269 B. Bott, M. Hannig Close Preview Purchase PDF (373 K) | Related Articles AbstractAbstract | Figures/TablesFigures/Tables | ReferencesReferences Abstract Objectives: The aim of this in vitro study was to assess the marginal adaptation of prefabricated Class I ceramic inlay restorations placed with various luting materials. Methods: Forty-two standardized occlusal cavities were prepared in extracted human molars with diamond burs exactly corresponding to the dimensions of prefabricated glass ceramic inlays. The prepared teeth were randomly assigned to seven groups of six teeth each and restored using (1) the composite resin Tetric Ceram in increment technique [Group I] or (2) ceramic inlays (Cerana) luted with: the composite based materials Dual Cement [Gr. II] and Panavia 21 [Gr. III], the compomer material Dyract Cem [Gr. IV], Dyract Cem with additional use of Prime & Bond 2.1 [Gr. V], the silicophosphate cement Trans-Lit [Gr. VI], or the ethylcyanoacrylate Cyano-Veneer [Gr. VII]. Marginal adaptation was evaluated by SEM-analyses before and after thermal cycling (2500 cycles; 5–55 °C) and mechanical loading (100 N; 500,000 cycles) using replica models. Kruskal–Wallis H-test and Mann–Whitney U-test were used for statistical analyses. Results: Group I (increment technique) as well as Groups II–V (inlay technique) revealed high percentages of perfect marginal adaptation in over 95% of the analyzed margins, both before and after thermo-mechanical loading. Statistical significant differences could not be detected within these groups. All inlays luted with silicophosphate cement (Group VI) and four of six inlays applied with Cyano-Veneer (Group VII) fractured under occlusal load. Significance: A stable bonding to the enamel and to the ceramic inlay was achievable with the composite luting resins Dual Cement and Panavia 21 as well as with the compomer based luting material Dyract Cem but not with the use of the silicophosphate cement Trans-Lit or the ethylcyanoacrylate Cyano-Veneer. Article Outline 1. Introduction 2. Materials and methods 2.1. Group I: composite resin restoration with the increment technique 2.2. Groups II–VII: Class I ceramic inlays 2.3. Group II: ceramic inlay and low-viscous dual-hardening luting composite 2.4. Group III: ceramic inlay and low-viscous chemical-curing luting composite 2.5. Group IV and V: ceramic inlay and luting compomer 2.6. Group VI: ceramic inlay and ethylcyanoacrylate luting material (Cyano-Veneer) 2.7. Group VII: ceramic inlay and silicophosphate cement (Trans-Lit) 2.8. Finishing 2.9. Thermal cycling and mechanical loading 2.10. Analyses of marginal adaptation 2.11. Statistical analysis 3. Results 4. Discussion 5. Conclusions References