Technology 4 valuation of Apical Cavity Preparation With a New Type f Ultrasonic Diamond Tip

T bstract his study evaluated the time, occurrence of fracture, nd quality of apical cavity preparation with three ifferent ultrasonic diamond tips: Satelec, Trinity, and a ew type, CVD (chemical vapor deposition), using scaning electron microscopy (SEM) analysis. Thirty human ingle-rooted premolars were selected, submitted to picectomy, and prepared with ultrasonic tips; impresions were then obtained. The presence of fractures as evaluated on the impressions, and the quality of reparation was evaluated by SEM analysis of teeth nd scoring by two examiners. The group prepared with he CVD tips exhibited the shorter preparation time and id not present fractures. There was no statistically ignificant difference in the quality of preparation for he three tips. The three brands of ultrasonic tips prouced adequate grinding without altering the morpholgy of the apical foramen. (J Endod 2007;33:484–487)