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Year : 2017  |  Volume : 14  |  Issue : 4  |  Page : 216-219

Fracture resistance of premolars teeth restored by silorane, nanohybrid and two types of fiber-reinforced composite: an in-vitro study

Department of Operative Dentistry, Faculty of Dentistry, Al Azhar University, Cairo, Egypt

Correspondence Address:
Mostafa S Mohamed Ata
Department of Operative Dentistry, Faculty of Dentistry, Al Azhar University, Cairo
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/tdj.tdj_46_17

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Objective The objective was to evaluate and compare the fracture resistance of human maxillary premolars teeth restored with low shrinkage microhybrid composite Silorane-based; Filtek P90 LS, conventional methacrylate-based nanohybrid composite; Ceram X Mono, and two types of fiber-reinforced composites (FRCs); Alert and XENIUS base, micro glass fibers and short glass fibers, respectively in mesio-occluso-distal cavities. Materials and methods A total of 45 human maxillary premolars were selected. Standardized mesio-occluso-distal cavities were prepared in all teeth. Five prepared teeth received no treatment and served as controls (group 1). A total of 40 teeth were randomly divided into four experimental groups (n = 10); group 2: low shrinkage Silorane-based composite, group 3: nanohybrid resin composite, group 4: microfibers reinforced resin composite, and group 5: short fibers reinforced resin composite. Restorations were done for all groups. After being stored 24 h at 37°C, fracture resistance was measured in a universal Instron testing machine by using a 4 mm diameter steel sphere which was applied on tooth buccal and lingual cusps at a cross-head speed of 2 mm/min until fracture occurred. Statistical analysis One-way analysis of variance and Tukey's post-hoc test. Results Highest mean fracture resistance was observed with FRC, nanohybrid, Silorane and lastly with control respectively. Statistically Significant difference was revealed by analysis of variance (P ≤ 0.0001) and Tukey's post-hoc test (P ≤ 0.0001). Conclusion Among the experimental groups, FRC showed the highest fracture resistance.

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