【摘要】 随机选择临床上弯曲度15°~40°(Schneider法)的磨牙根管各30个分别使用Hyflex CM和ProTaper Universal进行预备,拍摄预备前后定位平行投照数字X线根尖片,比较Hy Flex CM和ProTaper预备前后根管弯曲度的改变,评价其对弯曲根管的预备效果。发现Hyflex CM与ProTaper预备后弯曲度分别减少4.54°±3.25°(P<0.001)及5.63°±3.84°(P<0.001);Hyflex CM变直量比ProTaper小1.09°,但两者间无统计学差异(P>0.05)。Hyflex CM可满足临床对弯曲根管的预备要求。更多还原

【Abstract】 60 curved root canals of permanent teeth with angles of curvature ranging from 15°to 40°( Schneider’s methodology) were prepared using the instruments of Hyflex CM( HC) and Pro Taper( PT) Universal respectively( n = 30). Using standardized pre-and post-instrumentation paralleling periapical radiographs,canal curvature was determined by image analysis software and the clinical shaping effect of Hyflex CM and Pro Taper rotary Ni Ti files were compared. The canal curvature in group HC and PT decreased by 4. 54° ± 3. 25° and 5. 63° ±3. 84° respectively( between pre-and post-treatment in both groups,P < 0. 05; between groups,P > 0. 05). Hyflex CM can meet the clinical necessity for the instrumentation of curved root canals.更多还原