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Investigating filler morphology and mechanical properties of new low-shrinkage resin composite types.

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Leprince, Julian [UCL] Palin, W M Mullier, Thérèse [UCL] Devaux, Jacques [UCL] Vreven, José [UCL] Leloup, Gaëtane [UCL]

Summary Three types of low-shrinkage composites are today commercially available: Ormocers, cationic ring-opening curing systems and highly filled methacrylate-based materials, which cure via free-radical polymerization mechanisms. The aim of this study was to characterize the inorganic fraction of materials belonging to each type and to compare their mechanical properties. Two Ormocers (Admira and an experimental Ormocer V35694), one ring-opening composite (Filtek Silorane) and five methacrylate-based composites [Filtek Supreme XT, Tetric EvoCeram, Grandio, Synergy D6 (Coltène-Whaledent, Langenau, Germany) and an experimental material, V34930] were tested. Inorganic fillers were quantified by thermogravimetric analysis and morphologically characterized by scanning electron microscopy. Dynamic modulus was determined by an impulse excitation technique, static elastic moduli and flexural strength by a three-point bending method. The results were analyzed using anova tests (P < 0.05) and linear correlations. Grandio, V34930 and V35694 exhibited significantly higher filler mass fractions. Both dynamic and static moduli of Grandio and V34930 were significantly higher than the other materials (P < 0.05), although no significant difference in flexural strength was observed between material type (P > 0.05). From the present findings, it was suggested that V35694 and Filtek Silorane exhibit comparable properties to conventional methacrylate-based composites, although clinically the cavity type and location must guide material choice. Under high occlusal load, the use of Grandio and V34930 might be favoured. For small cavities, alternative technologies could be preferred as the need for mechanical resistance is lower and the potential for stress generation is greater.

Document type Article de périodique (Journal article) – Journal Article, Research Support, Non-U.S. Gov't
Publication date 2010
Journal information "Journal of oral rehabilitation" - Vol. 37, no. 5, p. 364-76 (2010)
Peer reviewed yes
e-issn 1365-2842
issn 0305-182X
Publication status Publié
Affiliation UCL - SST/IMCN - Institute of Condensed Matter and Nanosciences
MESH Subject Statistics, Nonparametric ; Siloxanes ; Pliability ; Phase Transition ; Particle Size ; Nanocomposites ; Methacrylates ; Materials Testing ; Linear Models ; Light-Curing of Dental Adhesives ; Hardness ; Elastic Modulus ; Dental Stress Analysis ; Dental Marginal Adaptation ; Composite Resins - chemistry - radiation effects ; Analysis of Variance
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Bibliographic reference Leprince, Julian ; Palin, W M ; Mullier, Thérèse ; Devaux, Jacques ; Vreven, José ; et. al. Investigating filler morphology and mechanical properties of new low-shrinkage resin composite types.. In: Journal of oral rehabilitation, Vol. 37, no. 5, p. 364-76 (2010)
Permanent URL http://hdl.handle.net/2078.1/30416