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組的管腔邊緣質(zhì)量優(yōu)于慢速手機(jī)組(P=0.029)。