An ultrasonic cutting device for osteotomy is provided. The device has a blade extending in a longitudinal direction, an attachment member connected through an extension member with a handpiece configured to generate vibrations. The attachment member is connected to a proximal end of the blade which has a plurality of cutting elements formed on a distal portion thereof. The cutting elements have an arcuate portion arranged at a free end of the distal portion in the longitudinal direction and the arcuate portion has a continuous cutting edge with a plurality of triangular shaped teeth on opposite sides of the blade. The overall configuration of the distal portion of the blade is symmetrical relative to the longitudinal axis and progressively widens from the arcuate portion towards the proximal portion of the blade in the portion where the teeth are formed.
