Mohamed Elsayed Am, Fathieh Shakeri M, Farzaneh Taqipour A, Homeira Barani A
Department of Restorative Dentistry, College of Dentistry, Ajman University, UAE; Department of Endodontic, Faculty of Dentistry, Mansoura University, Egypt, Phone: 00971505454426, e-mail:
Department of Restorative Dentistry, College of Dentistry, Ajman University, UAE.
J Contemp Dent Pract. 2019 Feb 1;20(2):158-165.
The aim of this study was to assess the effect of three root canal irrigants on the apical sealing ability of three single-cone obturation systems.
One hundred maxillary central incisors were selected and their crowns were cut. The roots were divided into three experimental groups of 30 samples each, and one control group of 10 samples (5 positives and 5 negatives). Each experimental group was divided equally into three subgroups according to the obturation system. All root canals were instrumented using ProTaper Universal rotary system and irrigated with 3% sodium hypochlorite (Group 1), 2% chlorohexidine (Group 2), 3% hydrogen peroxide (Group 3). Finally, root canals were irrigated with 17% EDTA followed by distilled water, then obturated with a single-cone technique using gutta-percha/MTA Fillapex (Subgroup A), gutta-percha/ AH Plus (Subgroup B), and Resilon/Relseal SE (Subgroup C). The microleakage was assessed using linear dye penetration method and data were statistically analyzed.
Significant differences were found between all groups and subgroups (). When 3% of hydrogen peroxide was used, no leakage was observed with AH Plus sealer, and a high amount of leakage (5.82 ± 0.47 mm) was observed with Realseal SE. MTA Fillapex (0.49 ± 0.08 mm) and Realseal SE (1.11 ± 0.50 mm) showed the lowest amounts of leakage when 2% chlorohexidine and 3% sodium hypochlorite were used, respectively.
The type of irrigating solution and obturation system could affect the apical leakage value when single-cone obturation technique was used. AH Plus/gutta-percha obturation system showed no apical leakage when root canals were irrigated with 3% hydrogen peroxide. The using of 2% chlorohexidine improved sealing ability of MTA Fillapex/gutta-percha. The apical sealing ability of Realseal SE/Resilon decreased when 3% hydrogen peroxide or 2% chlorhexidine was used.
Proper selection of irrigating solutions may positively influence the apical sealing ability of single-cone obturation systems.
本研究旨在评估三种根管冲洗剂对三种单锥充填系统根尖封闭能力的影响。
选取100颗上颌中切牙，截去其牙冠。将牙根分为三个实验组，每组30个样本，以及一个对照组，10个样本（5个阳性和5个阴性）。根据充填系统，每个实验组再平均分为三个亚组。所有根管均使用ProTaper Universal旋转系统进行预备，并分别用3%次氯酸钠（第1组）、2%氯己定（第2组）、3%过氧化氢（第3组）冲洗。最后，根管先用17%乙二胺四乙酸冲洗，再用蒸馏水冲洗，然后采用单锥技术，分别用牙胶尖/MTA Fillapex（A亚组）、牙胶尖/AH Plus（B亚组）和热牙胶/Resilon/Relseal SE（C亚组）进行充填。采用线性染料渗透法评估微渗漏情况，并对数据进行统计学分析。
所有组和亚组之间均存在显著差异（）。使用3%过氧化氢时，AH Plus封闭剂未见渗漏，而Realseal SE出现大量渗漏（5.82±0.47mm）。分别使用2%氯己定和3%次氯酸钠时，MTA Fillapex（0.49±0.08mm）和Realseal SE（1.11±0.50mm）的渗漏量最低。
采用单锥充填技术时，冲洗液类型和充填系统会影响根尖渗漏值。用3%过氧化氢冲洗根管时，AH Plus/牙胶尖充填系统未见根尖渗漏。使用2%氯己定可提高MTA Fillapex/牙胶尖的封闭能力。使用3%过氧化氢或2%氯己定时，Realseal SE/热牙胶的根尖封闭能力下降。
正确选择冲洗液可能对单锥充填系统的根尖封闭能力产生积极影响。
