Three-Dimensional Evaluation of the Root Apex of Permanent Maxillary Premolars: A Multicentric Study

Aim: Modern endodontics has advanced radically in the recent years, and recently, it been focused on concept of mini-invasive treatments. This study aimed to evaluate sections root apices at 1 mm from radiographic apex using a high-resolution CBCT. Materials Methods: The current was performed three different dental centers. One hundred maxillary permanent premolars (50 first 50 s premolars) were analyzed measurement software CBCT pictures. mesio-distal (M-D) bucco–palatal (B-P) measured each root. section 0.3 or less, anatomical upper premolars, decided as limit value. All values statistically analyzed. Results: mean value 304 1.03 (±0.37). Only 19 (6.3%) had measurements less than equal mm. these (p = 0.002). Conclusions: Based data obtained, authors recommend performing conservative shaping when endodontically treating especially pre-operative actual apical dimensions cannot be acquired.