Three-year clinical performance of two indirect composite inlays compared to direct composite restorations

N Ozakar-Ilday,M Yildiz,V Erdem,Yo Zorba,N Seven,S Demirbuga

doi:10.4317/medoral.18491

N Ozakar-Ilday, M Yildiz + Show 4 more

Open Access

https://doi.org/10.4317/medoral.18491

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Abstract

Objective: Despite the incremental build-up of resin composite restorations, their polymerization shrinkage during curing presents a serious problem. Indirect composite resin systems represent an alternative in overcoming some of the deficiencies of direct composite restorations. The hypothesis of the present study states that the clinical performance of restorations may be affected by different generation and application techniques. Study Design: Sixty restorations (20 DI system (Coltène/Whaledent AG, Altstätten, Switzerland) composite inlays, 20 Tescera ATL system (BISCO Inc. Schaumburg, Illinois, USA) composite inlays, and 20 direct composites) were applied to premolar teeth in 49 patients. Restorations were clinically evaluated by two examiners. Data were analyzed using the Kruskal-Wallis, Mann-Whitney U, Wilcoxon Signed Ranks, and X2 tests. Results: The Tescera ATL system performed significantly better than both direct composite restorations (p<0.001) and DI system (p<0.05). Conclusion: Within the limitations of this 3-year clinical study, indirect resin restorations showed better scores than direct restorations. In addition, the Tescera ATL system was found to be more successful than the DI system and direct composite restorations. Key words:Composite, inlay, direct composite restorations, indirect composite restorations.

Highlights

Advances in restorative dentistry and increases in patient expectations regarding aesthetics have led to demands for non-metallic, tooth-colored restorations in the posterior region [1]
DI system (Coltène/Whaledent AG, Altstätten, Switzerland) is a first-generation laboratory composite system that consists of a hybrid composite containing fineparticle glass filler and a DI 500 heat/light cure oven required for advanced polymerization
This study aimed to assess the 3-year clinical performances of DI system and Tescera ATL indirect composite inlays when used for restoration of premolar teeth

Summary

Introduction

Advances in restorative dentistry and increases in patient expectations regarding aesthetics have led to demands for non-metallic, tooth-colored restorations in the posterior region [1]. The first generation of laboratory composites was developed in the 1980s as an alternative for clinicians to overcome some inherent deficiencies of direct composites restorations, including polymerization shrinkage, inadequate polymerization in deep interproximal areas and restoration of proximal contacts and contour [5] In spite of their secondary curing (by heat, light, pressure, or argon laser), the first generation laboratory inlay composite resins exhibit low levels of flexural strength (60-80 MPa) and elastic modulus (2.0-3.5 GPa), a resin volume percentage higher than 50% and high abrasive wear levels in conjunction with low levels of inorganic filler contents [6]. The null hypothesis in this study was that the clinical performance of composite inlays may be affected by different generation and application techniques

Methods

Results

Conclusion