Thickness of the remaining enamel after the preparation of cingulum rest seats on maxillary canines / Espessura do esmalte remanescente após a preparação do cingulum remanescente dos caninos maxilares

This study evaluated the level of tissue removal that takes place on enamel and dentin during cingulum rest seat preparation. A quantitative evaluation of the thickness of the remaining enamel of cingulum seat preparations to receive removable partial denture rests was carried out in 20 maxillary canines with a light optical microscope. Thirty percent of the preparations were overextended into dentinal tissue, and 85 percent had depths that were insufficient to receive rests