Table 1 Parameters for Fixed Torsional (Fixed Tor) and Linear Torsional+Ultrasound (Lin Tor+US) and Ultrasound groups (US)
GroupFixed TorLin Tor+USUS
Torsional amplitude100% (fixed)100% (linear)
Ultrasound power (%) (burst)030% (linear)60
Vacuum limit (mm Hg) (fixed)400 (fixed)400 (fixed)400
Aspiration flow rate (cm3/min) (fixed)40 (fixed)40 (fixed)40