slow-speed handpiece

However, the quality of cavity margin of the slow-speed handpiece group was significantly inferior to the ultrasonic Diamond tip Berutti and NiTi tip RE2 group(P=0.029)in Part 2.
第二部分中超聲波金剛砂尖Berutti與鎳鈦尖RE2組的琯腔邊緣質量優於慢速手機組(P=0.029)。