Evaluation of Toothbrush Abrasion of a Provisional C&B Material "TEMPSMART”

Objectives: Automix resin based provisional C&B materials are widely used. For long term clinical cases, their abrasion resistance is important for gloss maintenance and preventing plaque attachment. A new dual-cured composite provisional C&B material “TEMPSMART” was developed with high abrasion resistance. The purpose of this study was to investigate toothbrush abrasion of TEMPSMART and compare to other provisional C&B materials.
Methods: TEMPSMART (GC), Protemp Plus (3M), Integrity Multi-Cure (DENTSPLY), Integrity (DENTSPLY), Luxatemp Ultra (DMG), Luxatemp Solar (DMG) were studied. Each material was filled into a metal mold (15 mm diameter, 1.5 mm deep) then cured according to the manufacturers' instructions to make specimens. All were stored in 37 degree Celsius distilled water for 24 hours. One side of each specimen was polished with SiC paper up to #4000 grit and a polishing paste (Super-Star, Nippon Shika Kogyosha). A toothpaste slurry was prepared by mixing White & White dentifrice (Lion) and distilled water (1:2 weight ratio). Toothbrush abrasion test was performed on polished surfaces of specimens using a GC Prospec hard toothbrush and toothpaste slurry for 12,000 cycles. Surface gloss value was measured with a glossmeter (VG2000, Nipppon Denshoku) and analyzed by two-way ANOVA followed by Tukey-Kramer Multiple comparison test (p<0.05).
Results: TEMPSMART showed significantly higher gloss value compared to other provisional C&B materials after 12,000 cycles.
Conclusions: TEMPSMART is an excellent aesthetic provisional C&B material because it has superior abrasion resistance to maintain high gloss level.