For distal surface on rear teeth. For the removal of sub-gingival calculus and for the root cleaning. Gracey curettes are the most popular and common, less traumatic than the Universal type. They are site specific as they are designed and assorted to adapt to the specific area or tooth surface to be treated. The blade of the Gracey curette is curved in the shank depending on the type and sharped only in one side.. With one edge lower than the other, used at 70