An ultrasound resonant dipole or sonotrode (3) for medical applications includes: a tang (30, 31, 32) designed to be connected to a handset including an utrasound transducer (1) that vibrates at ultrasound frequency with a longitudinal axis of vibration (X-X) coaxial with the axis of the tang, an annular element (33) connected to the tang, and a tool (5) disposed on the annular element (33) connected to the tang, and a tool (5) disposed on the annular element (33) with an axis of vibration (Y-Y) inclined with respect to the axis of vibration (X-X) of the transducer. The annular element (33) is discontinuous and has an aperture (34).
