Activ GP与Gutta Flow的封闭能力及氢氧化钙去除方法之间的关系
Relationship between sealing ability of Activ GP and Gutta Flow and methods of calcium hydroxide removal.
作者信息
Nikhil Vineeta, Singh Vijay, Singh Simranjeet
机构信息
Department of Conservative Dentistry and Endodontics, Subharti Dental College, Meerut, India.
出版信息
J Conserv Dent. 2012 Jan;15(1):41-5. doi: 10.4103/0972-0707.92605.
AIM
To evaluate the effect of method of calcium hydroxide intracanal dressing removal, on sealing ability of Gutta Flow and Activ GP.
MATERIALS AND METHODS
Seventy extracted mandibular premolars were sectioned at CEJ and canals were prepared with profile 4% rotary file till #40. Canals were filled with calcium hydroxide, coronally sealed with Cavit G and stored at 37°C. After 7 days, samples were divided on the basis of calcium hydroxide removal method (Master apical file, Navi Tip FX, and F File) and obturating material (Activ GP and Gutta Flow). Three coats of nail polish were applied except 2 mm around apical foramen and samples were immersed in India ink dye, sectioned, and observed under stereomicroscope for microleakage.
RESULTS
The results were statistically analyzed with one way ANOVA-F with Tukey HSD test with the null hypothesis set as 5%.
CONCLUSIONS
The seal of the canal system was adversely impacted by residual calcium hydroxide when Activ GP and Gutta Flow were used as obturating material and the sealing ability of Activ GP and Gutta Flow was better when MAF was used for removal of calcium hydroxide than F file or Navi tip FX.
目的
评估氢氧化钙根管内封药去除方法对Gutta Flow和Activ GP封闭能力的影响。
材料与方法
将70颗拔除的下颌前磨牙在牙釉质牙骨质界处截断，用Profile 4%旋转锉预备根管至40号。根管内充填氢氧化钙，用Cavit G进行冠部封闭，并在37°C下储存。7天后，根据氢氧化钙去除方法（主尖锉、Navi Tip FX和F锉）和充填材料（Activ GP和Gutta Flow）对样本进行分组。除根尖孔周围2mm外，在样本上涂三层指甲油，然后将样本浸入印度墨汁染料中，切片，并在体视显微镜下观察微渗漏情况。
结果
采用单因素方差分析-F和Tukey HSD检验对结果进行统计学分析，原假设设定为5%。
结论
当使用Activ GP和Gutta Flow作为充填材料时残留的氢氧化钙会对根管系统的封闭产生不利影响，并且与F锉或Navi tip FX相比，使用主尖锉去除氢氧化钙时Activ GP和Gutta Flow的封闭能力更好。
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