Jeevanandan G, Govindaraju L
Department of Paediatric and Preventive Dentistry, Saveetha Dental College and Hospitals, Chennai, Tamil Nadu, India.
Eur Arch Paediatr Dent. 2018 Aug;19(4):273-278. doi: 10.1007/s40368-018-0356-6. Epub 2018 Jul 12.
This was to compare and evaluate the instrumentation time and quality of obturation between paediatric rotary file (Kedo-S) and manual instrumentation techniques in primary molars.
A double blinded randomised control trial was performed that included mandibular primary molars in children of age 4-7 years with pulp necrosis. Sixty primary mandibular molars were randomly divided into two groups: 30 were instrumented with paediatric rotary files Kedo-S (experimental group) and 30 with hand K-files (control group). During the preparation of the primary root canals the instrumentation time was recorded in seconds. The quality of obturation was recorded as optimal, under filled or over filled using immediate post-operative radiographs. The instrumentation time and quality of obturation were analysed using independent t-test and Chi-square test.
Mean instrumentation time with paediatric rotary files Kedo-S (78.53 s) was significantly less than K-files (95.46 s) (p < 0.05). There was a significant improvement in the quality of obturation (p < 0.05) with paediatric rotary files (Kedo-S).
Clinical use of paediatric rotary files Kedo-S was effective during root canal preparation of primary teeth with reduction in instrumentation time and better quality of obturation.
比较和评估儿童旋转锉（Kedo-S）与手动器械预备技术在乳磨牙根管预备中的操作时间及充填质量。
进行一项双盲随机对照试验，纳入4至7岁患有牙髓坏死的儿童的下颌乳磨牙。60颗下颌乳磨牙随机分为两组：30颗用儿童旋转锉Kedo-S进行预备（试验组），30颗用手动K锉进行预备（对照组）。在预备乳牙根管过程中，记录操作时间（以秒为单位）。使用术后即刻X线片将充填质量记录为恰填、欠填或超填。采用独立t检验和卡方检验分析操作时间和充填质量。
儿童旋转锉Kedo-S的平均操作时间（78.53秒）显著短于K锉（95.46秒）（p < 0.05）。使用儿童旋转锉（Kedo-S）时，充填质量有显著改善（p < 0.05）。
儿童旋转锉Kedo-S在乳牙根管预备中临床应用有效，可减少操作时间并提高充填质量。
