Akademik Veri Yönetim Sistemi
Australian Endodontic Journal, cilt.51, sa.2, ss.317-328, 2025 (SCI-Expanded, Scopus)
The objective was to evaluate the marginal adaptation and fracture resistance of endodontically treated teeth (ETT) restored using various preparation designs and materials. Except for the positive control group (n = 15), 135 teeth with ETT were divided into three main groups (n = 45): MOD (Mesio-occlusal-distal), retention slots and cuspal coverage. Each main group was further subdivided into three sub-groups (n = 15): nano-hybrid composite resin, short fibre-reinforced composite resin (SFRC) and a CAD/CAM nano-ceramic composite block. After chewing simulation, the specimens were examined using SEM; a quantitative marginal adaptation analysis and fracture resistance test were performed. MOD preparations exhibited the highest marginal deterioration (p < 0.001). Gingival marginal deterioration in nano-hybrid composite restorations was significantly higher than in CAD/CAM restorations (p = 0.023), though the difference between nano-hybrid and SFRC restorations was not significant (p = 0.447). The MOD cavity showed significantly lower fracture resistance compared to retention slots and cuspal coverage groups (p < 0.001). SFRC demonstrated the highest fracture resistance (p < 0.001).