Reddy K Balakoti, Dash Shreemoy, Kallepalli Sowmya, Vallikanthan Sangeetha, Chakrapani N, Kalepu Vamsi
Professor and Head, Department of Conservative Dentistry and Endodontics, St Joseph Dental College and Hospital, Eluru, Andhra Pradesh, India.
Senior Lecturer, Department of Conservative Dentistry and Endodontics St Joseph Dental College and Hospital, Eluru, Andhra Pradesh, India e-mail:
J Contemp Dent Pract. 2013 Nov 1;14(6):1028-35. doi: 10.5005/jp-journals-10024-1445.
The present study was conducted to compare the cleaning efficacy (debris and smear layer removal) of hand and two NiTi rotary instrumentation systems (K3 and ProTaper).
Sixty single rooted human maxillary anterior teeth decoronated at the cementoenamel junction were used. All the specimens were divided into four groups of 15 teeth each, group I--ProTaper rotary instrumentation done, group II--K3 rotary instrumentation done, group III--Stainless steel K-file instrumentation done, group IV--root canal irrigation without instrumentation. Root canal preparation was done in a crown down manner and 3% sodium hypochlorite was used as irrigant after each file followed by final rinse with 5 ml of 17% EDTA solution, then specimens were scanning electron microscopic (SEM) examination.
Statistical analysis was done using one-way ANOVA followed by post hoc Tukey's HSD test. Group I showed highly statistical significant difference compared to other groups. There was no statistically significant difference considering smear layer at any levels among the groups with no smear layer formation in group IV.
ProTaper rotary instrumentation showed the maximum cleaning efficacy followed by K3 rotary instrumentation in the coronal, middle and apical thirds of the root canal.
ProTaper rotary instruments are more efficient than hand and K3 rotary instruments during root canal treatment.
本研究旨在比较手动和两种镍钛旋转器械系统（K3和ProTaper）的清洁效果（去除碎屑和玷污层）。
使用60颗在牙骨质釉质界处截冠的单根人上颌前牙。所有标本分为四组，每组15颗牙，第一组——使用ProTaper旋转器械预备根管，第二组——使用K3旋转器械预备根管，第三组——使用不锈钢K锉预备根管，第四组——不进行器械预备仅进行根管冲洗。根管预备采用冠向深入法，每更换一根锉后使用3%次氯酸钠作为冲洗液，随后用5毫升17%乙二胺四乙酸（EDTA）溶液进行最终冲洗，然后对标本进行扫描电子显微镜（SEM）检查。
采用单因素方差分析，随后进行事后Tukey's HSD检验进行统计学分析。第一组与其他组相比显示出高度统计学显著差异。在各组之间，考虑玷污层时，在任何水平均无统计学显著差异，第四组未形成玷污层。
在根管的冠部、中部和根尖三分之一处，ProTaper旋转器械预备根管显示出最大的清洁效果，其次是K3旋转器械。
在根管治疗过程中，ProTaper旋转器械比手动和K3旋转器械更有效。
