Abstract: An ultrasonic dental handpiece having a thin, flexible, elongated abrasive tool attached thereto for removing calculus deposits from the surface of teeth. A thin, flexible abrasive tool having a specifically selected diameter is used in conjunction with an ultrasonic handpiece for the purpose of removing calculus from deep within a periodontal pocket without traumatizing the surrounding tissue and bone. The use of a diamond coated abrasive tool aids in tactually detecting fine calculus deposits deep below the gum line. An annular aperture surrounding the circumference of the abrasive tool is used to provide a fluid spray for washing away loosened calculus. The ease and efficiency of calculus removal is greatly enhanced.