%0 Journal Article
%T Evaluation of the fracture strength of different CAD/CAM inlay restorations after accelerated aging
%A Tuba Y£¿lmaz Sava£¿
%J -
%D 2019
%X Background: The purpose of this study was to compare the fracture resistance of inlay restorations manufactured by computer aided design/computer aided manufacturing (CAD/CAM) using different materials after accelerated artificial aging. Materials and Methods: Class I inlay preparations were made for 40 mandibular molar teeth. The teeth were allocated into four groups (n=10) according to the type of manufacturing material used: feldspathic-ceramic (CEREC blocks); leucite-based glass-ceramic (IPS Empress CAD); resin nano-ceramic (Lava Ultimate); and a control (intact teeth). After obtaining digital impressions, restorations were designed and milled with CAD/CAM. Inlay restorations were cemented to the inlay cavities using a dual-polymerizing resin cement (Rely X Ultimate) and stored in distilled water at 37¡ãC for a week. All the samples were then exposed to accelerated ultraviolet aging for 300 hours. Finally, a compressive load was applied to the samples until fracture. Statistical analysis was conducted using One-Way ANOVA and the Tukey HSD test (¦Á=0.05). Results: The mean fracture strength values of the groups were; Control (1555.3¡À412.2 N)> Lava Ultimate (1525¡À394N)>IPS Empress CAD (1364.3¡À545.6N) > CEREC(1231.9¡À412.2N), respectively. However, there was no statistically significant difference in mean fracture strength among different inlay restoration groups (P>0.05). Fifty percent of the both CEREC and IPS Empress CAD groups and 60% of the Lava Ultimate group showed reparable fractures. Conclusion: The type of material used did not influence the fracture strength of inlay-restored molar teeth and inlay restorations did not weaken the strength of the restored teeth. Therefore, all of the tested materials are suitable for use in the posterior region
%K CAD/CAM
%K seramik
%K k£¿r£¿lma dayan£¿m£¿
%K inley
%K rezin nano-seramik
%U http://dergipark.org.tr/selcukdentj/issue/47415/598408