摘要
目的比较4种机用镍钛器械预备树脂模拟弯曲根管的成形能力,为临床应用提供实验依据。方法 40个单弯树脂模拟根管随机分为4组,每组10个,分别使用Reciproc(组1)、Wave One(组2)、Mtwo(组3)和Pro Taper(组4)进行根管预备,记录4组的预备时间,测量预备后根管的工作长度;使用扫描仪获取4组预备前后的根管图像,使用Photoshop和Image J软件进行图像重叠并测量预备后根管弯曲角度的变化值,从距根尖孔1 mm开始,每隔1 mm测量根管内外侧壁树脂去除量,共10个测量点,计算中心定位能力。使用单因素方差分析、Kruskal-Wallis检验和SNK检验进行统计学分析,检验水准为双侧α=0.05。结果组2预备时间最短,为(53.7±6.7)s,组1、组3和组4分别为(86.9±8.1)、(112.2±8.2)、(177.9±11.2)s,4组间差异有统计学意义(P<0.05)。4种器械预备前后根管工作长度变化的差异无统计学意义(P>0.05)。组1、组2、组3、组4根管弯曲角度变化值分别为(2.671±0.637)°、(2.667±0.450)°、(3.664±0.870)°、(3.797±0.601)°,组1和组2的变化值显著小于组3和组4(P<0.05)。在距根尖孔3 mm位点,组1的偏移程度为(-0.016±0.094)mm,显著小于其余3组(P<0.05);在距根尖孔4 mm和5 mm处,组2的偏移程度分别为(-0.080±0.104)mm和(-0.312±0.088)mm,显著小于组1[(-0.243±0.099)mm和(-0.404±0.064)mm,P<0.05]。结论 Reciproc和Wave One可快速有效地预备根管,且可较好地保持树脂弯曲根管的原始形态;Reciproc在根尖区具有较好的中心定位能力,Wave One在根管弯曲中段部分具有较好的中心定位能力。
Objective This study aims to evaluate the shaping capability of Reciproc,Wave One,Mtwo,and Pro Taper instruments in simulated root canals.Methods A total of 40 simulated resin blocks were divided randomly into four groups.Each group was prepared with Reciproc（Group 1）,Wave One（Group 2）,Mtwo（Group 3）,and Pro Taper（Group 4）.The preparation time and reduction in working length after preparation were measured.Pre-and post-operative images were obtained with a scanner and superimposed through Photoshop.The changes in canal curvature and material removal from the inner and outer canal walls at 10 points beginning at 1 mm from the end point of the canal were measured with Image J.Centering capability was determined accordingly.Data were analyzed through one-way ANOVA,SNK,and Kruskal–Wallis at a significance level of P〈0.05.Results The preparation time of Group 2 was（53.7±6.7） s,whereas those of Groups 1,3,and 4 were（86.9±8.1） s,（112.2±8.2） s,and（177.9±11.2） s,respectively;the difference was found to be significant（P〈0.05）.The reductions in working length among the four groups after preparation were not significantly different（P〉0.05）.The canal curvature for Groups 1 to 4 were 2.671°±0.637°,2.667°±0.450°,3.664°±0.870°,and 3.797°±0.601°,respectively.The changes for Groups1 and 2 were significantly smaller than those for Groups 3 and 4.At the 3 mm point,the transportation of Group 1 was（-0.016±0.094） mm,which was significantly less than that of the other instruments（P〈0.05）.At the 4 mm and 5 mm points,the transportation values of Group 2 were（-0.080±0.104） mm and（-0.312±0.088） mm,which were significantly less than that of Group 1 [（-0.243±0.099） mm,（-0.404±0.064） mm,P〈0.05].Conclusion Reciproc and Wave One can complete preparation faster and can maintain the original canal curvature better than Mtwo and Pro Taper.Reciproc exhibits superior centering capability in the apical part of the canal,whereas Wave One exhibits superior centering capability in the middle part of the canal.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2014年第6期606-610,共5页
West China Journal of Stomatology
基金
国家自然科学基金资助项目(81200826)
首都卫生发展科研专项基金资助项目(首发2011-2014-05)
关键词
往复运动
单支锉
根管预备
成形能力
reciprocating movement
single files
root canal preparation
shaping capability
