Fracture Rates and Lifetime Estimations of CAD/CAM All-ceramic Restorations

The gathering of clinical data on fractures of dental restorations through prospective clinical trials is a labor- and time-consuming enterprise. here,we propose an unconventional approach for collecting large datasets,from which clinical information on indirect restorations can be retrospectively analyzed. the authors accessed the database of an industry-scale machining center in germany and obtained information on 34,911 computer-aided design (cad)/computer-aided manufacturing (cam) all-ceramic posterior restorations. the fractures of bridges,crowns,onlays,and inlays fabricated from different all-ceramic systems over a period of 3.5 y were reported by dentists and entered in the database. survival analyses and estimations of future life revealed differences in performance among zro2-based restorations and lithium disilicate and leucite-reinforced glass-ceramics. © international & american associations for dental research.