title: The cardiac pacemaker and ultrasonic scalers.
mesh_terms: D003777:Dental Prophylaxis / Q000295:instrumentation*; D012534:Dental Scaling / Q000295:instrumentation* / Q000379:methods; D004582:Electronics, Medical; D006801:Humans; D010138:Pacemaker, Artificial; D014465:Ultrasonics / Q000295:instrumentation*