Nagas Emre, Karaduman Elcin, Sahin Cem, Uyanik Ozgur, Canay Senay
Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Department of Prostodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
J Dent Sci. 2016 Mar;11(1):79-82. doi: 10.1016/j.jds.2012.05.017. Epub 2012 Jul 11.
BACKGROUND/PURPOSE: To prepare the post apace, some of the root-canal filling material has to be removed, which can affect the apical seal. The aim of this study was to compare the effect of immediate post space preparation to that of delayed post space preparation on apical sealing using three different endodontic sealers and obturation techniques.
In total, 90 decrowned single-rooted human teeth were studied. After root canals were prepared with 0.06 tapered nickel-titanium rotary files to size 30, the roots were categorized randomly into three experimental groups according to the obturation material: (1) AH plus/gutta-percha; (2) Sealite Ultra/gutta-percha; and (3) Epiphany/Resilon. Furthermore in all groups, specimens were categorized randomly into three subgroups according to the obturation technique ( = 10): (1) single cone; (2) cold lateral compaction; and (3) System B + Obtura. After root-canal filling, post space preparation was immediately performed in Group 1, after 24 hours in Group 2, and after 7 days in Group 3. Apical leakage was measured using the fluid-filtration method. Statistical analysis was performed using the Kruskal-Wallis test and Wilcoxon signed ranks test at P < 0.001.
Regardless of the obturation technique and sealers used, significantly better (P < 0.001) sealing was achieved at the apical ends using delayed post space preparation than with immediate post preparation. The obturation techniques tested did not significantly affect leakage values. The following statistical ranking of fluid filtration values was obtained for the obturation materials: Epiphany/Resilon > Sealite Ultra/gutta-percha > AH plus/gutta-percha (P < 0.001).
To reduce apical leakage, clinicians should use AH plus together with any of the obturation techniques after 7 days of obturation.
背景/目的：为制备桩道，必须去除部分根管充填材料，这可能会影响根尖封闭。本研究的目的是比较三种不同的根管封闭剂和充填技术下，即刻桩道预备与延迟桩道预备对根尖封闭的影响。
共研究了90颗去冠的单根人牙。用0.06锥度的镍钛旋转锉将根管预备至30号，然后根据充填材料将牙根随机分为三个实验组：（1）AH plus/牙胶；（2）Sealite Ultra/牙胶；（3）Epiphany/Resilon。此外，在所有组中，根据充填技术将标本随机分为三个亚组（每组n = 10）：（1）单尖法；（2）冷侧方加压法；（3）System B + Obtura法。根管充填后，第1组即刻进行桩道预备，第2组在24小时后进行，第3组在7天后进行。采用液体过滤法测量根尖微渗漏。使用Kruskal-Wallis检验和Wilcoxon符号秩检验进行统计学分析，P < 0.001。
无论使用何种充填技术和封闭剂，延迟桩道预备在根尖处的封闭效果均显著优于即刻桩道预备（P < 0.001）。所测试的充填技术对微渗漏值没有显著影响。对于充填材料，获得了以下液体过滤值的统计排序：Epiphany/Resilon > Sealite Ultra/牙胶 > AH plus/牙胶（P < 0.001）。
为减少根尖微渗漏，临床医生应在根管充填7天后使用AH plus并结合任何一种充填技术。
