Cavity preparations performed with piezoelectric associated with diamond inserts

Objective: The present study evaluated the performance of cavity preparations in a group of patients, using piezoelectric associated to diamond inserts. Only posterior teeth were selected, and the restorations performed were of the Class I or II type, without cusp involvement. The aim of this study was relate the depth of cavity to patient’s sensitivity presented during preparation. Materials and Methods: From a group of 20 patients, 119 posterior teeth were prepared and evaluated about the depth and sensitivity presented during the interventions.All clinical procedures started without anesthesia, in order to measure the sensitivity of using piezoelectric with diamond inserts.The preparations were evaluated from a digital image generated from cast models , showing the depths and their relationship with the sensitivity presented during their execution. Results: Statistical analyzes were performed by separating patients into three groups with regard to sensitivity presentedGroups 1 (0 and 1); Groups 2 (2); Group 3(3). Wilcoxon Mann-tests Withney, Test t and Kruskal Wallis were used in each of the sensitive (2 and 3) and non-sensitive (Group 1) groups, with a 95% confidence level (p≤5/ α= 0.05) and complemented with the Tuckey test of variance to one parameter, where there was no significant difference. Conclusions: In all analyses, the results indicate that there were no significant differences between groups, so that in the sample it is not possible to identify correlation between the average depth of interventions and the level of sensitivity. Clinical Relevance: This study demonstrate the exclusive use of a oscillatory instrument as piezoelectric with diamond inserts to dental preparation, and its clinical behavior and advantages.