Upadhyay Vinod, Upadhyay Manoj, Panday R K, Chturvedi T P, Bajpai Usha
Department of Pedodontics, Faculty of Dental Sciences, IMS, BHU, Varanasi, India.
Indian J Dent Res. 2011 Nov-Dec;22(6):881. doi: 10.4103/0970-9290.94696.
The aim of this in-vitro study was to compare dentinal adaptation of conventional obturating material and GuttaFlow in young permanent teeth of child patients.
Ten young permanent anterior teeth with closed foramen were selected for the study. Root canal preparations were carried out using a step back technique. The canal was alternately irrigated with 5.25% sodium hypochlorite solution and 17% EDTA and normal saline. After root canal preparation specimens were randomly divided into two groups (n=5). GROUP "A": Obturated with zinc-oxide eugenol sealer and gutta-percha cone using cold lateral obturation technique. GROUP "B": Obturated with GuttaFlow as per the manufacturer's instruction. The teeth were split into two halves. Five randomly chosen longitudinal split teeth samples each from Group "A" and Group "B" was observed under scanning electron microscope to access the interface between obturating material and dentin at the level of 2 mm from the apex.
On statistical analysis the dentinal adaptation (μm) of Group A was observed with a mean of 0.52 and standard deviation 0.15, while the value of mean and standard deviation were noted 0.12 and 0.02 for Group B. The "t" value on comparison of Group A and Group B is 5.79 with "P " value of <0.001, which is highly significant.
From result of the study it can be concluded Group B samples showed significantly superior seal when compared with Group A. Complete seal was not observed in any of Group A samples.
本体外研究的目的是比较传统充填材料与GuttaFlow在儿童年轻恒牙中的牙本质适应性。
选择10颗根尖孔闭合的年轻恒前牙进行研究。采用逐步后退技术进行根管预备。根管交替用5.25%次氯酸钠溶液、17%乙二胺四乙酸和生理盐水冲洗。根管预备后，将标本随机分为两组（n=5）。A组：采用冷侧方加压充填技术，用氧化锌丁香酚封闭剂和牙胶尖充填。B组：按照制造商的说明用GuttaFlow充填。将牙齿切成两半。在扫描电子显微镜下观察从A组和B组中随机选取的各5个纵向劈开的牙齿样本，以观察距根尖2mm处充填材料与牙本质之间的界面。
经统计学分析，A组牙本质适应性（μm）的平均值为0.52，标准差为0.15，而B组的平均值和标准差分别为0.12和0.02。A组和B组比较的“t”值为5.79，“P”值<0.001，具有高度显著性。
从研究结果可以得出结论，与A组相比，B组样本的封闭性明显更好。A组样本中未观察到完全封闭的情况。
