Inan Ugur, Aydin Cumhur, Tunca Yasar Meric, Basak Feridun
Department of conservative dentistry and endodontics, Faculty of dentistry, Ondokuz Mayis University, Samsun, Turkey.
J Can Dent Assoc. 2009 Mar;75(2):123.
Widespread use of rotary nickel-titanium systems has caused manufacturers to produce gutta-percha cones that match the taper of the canals prepared with these systems. Obturations with these cones may provide 3-dimensional obturation of the root canal in less time. The aim of this study was to use a fluid filtration method to compare the apical sealing ability of matched-taper single-cone, Thermafil and lateral condensation obturations.
Sixty-six extracted human lower premolar teeth were instrumented to size F3 with ProTaper instruments. The teeth were divided into 3 groups and obturated with matched-taper single-cone, Thermafil and lateral condensation techniques. AH Plus was used as a sealer. Six teeth were used as positive and negative controls. A fluid filtration system was used to evaluate the apical seal. Measurements were made at 2-minute intervals for 8 minutes and the average of these values was recorded. One-way analysis of variance test was used for statistical analysis.
Mean leakage values for the lateral condensation, single-cone and Thermafil groups were 0.49 +/- 0.37 microL min(-1), 0.39 +/- 0.24 microL min(-1) and 0.44 +/- 0.25 microL min(-1), respectively. The difference between the groups was not statistically significant (p > 0.05).
The apical sealing ability of matched-taper single-cone obturation was comparable with that of lateral condensation and Thermafil techniques.
旋转镍钛系统的广泛使用促使制造商生产与用这些系统预备的根管锥度相匹配的牙胶尖。使用这些牙胶尖进行根管充填可能会在更短时间内实现根管的三维充填。本研究的目的是采用流体过滤法比较匹配锥度单尖、热牙胶尖和侧方加压充填的根尖封闭能力。
用ProTaper器械将66颗拔除的人下颌前磨牙预备至F3号。将牙齿分为3组，分别采用匹配锥度单尖、热牙胶尖和侧方加压技术进行充填。AH Plus用作封闭剂。6颗牙齿用作阳性和阴性对照。采用流体过滤系统评估根尖封闭情况。每隔2分钟测量一次，共测量8分钟，并记录这些值的平均值。采用单因素方差分析进行统计学分析。
侧方加压组、单尖组和热牙胶尖组的平均渗漏值分别为0.49±0.37微升/分钟、0.39±0.24微升/分钟和0.44±0.25微升/分钟。各组之间的差异无统计学意义（p>0.05）。
匹配锥度单尖充填的根尖封闭能力与侧方加压和热牙胶尖技术相当。
