Padmanabhan Prabeesh, Das Joydeep, Kumari R Veena, Pradeep P R, Kumar Ankur, Agarwal Sneha
Department of Conservative Dentistry and Endodontics, M R Ambedkar Dental College and Hospital, Bengaluru, Karnataka, India.
J Conserv Dent. 2017 Mar-Apr;20(2):86-90. doi: 10.4103/0972-0707.212230.
Endodontically treated teeth often lack sufficient support for a permanent restoration. During post space preparation, it is important not to disturb the integrity of the apical seal.
This study compared the effect of immediate versus delayed post space preparation on the apical seal using four different sealers.
One hundred and thirty single rooted teeth were biomechanically prepared and obturated with single cone gutta-percha and 4 sealers: Endoflas FS, AH Plus, Gutta flow and MTA. Teeth were divided randomly into eight groups, post spaces were prepared using Gates Glidden drills immediately for group I, III, IV and VII. For groups II, IV, VI and VIII prepared after storage of the specimens in 100% humidity for one week. The samples were kept in methylene blue dye, centrifuged at 3000 rpm for 3 min sectioned and then measured under stereomicroscope for apical leakage.
The data was analysed using one way ANOVA and Tukey test.
All the specimens showed dye leakage, and a statistically significant difference was seen among all the groups ( > 0.05) except Gutta flow.
Less leakage is seen when post space is prepared immediately.
经根管治疗的牙齿通常缺乏足够的支持以进行永久性修复。在制备桩道时，重要的是不要破坏根尖封闭的完整性。
本研究比较了使用四种不同的封闭剂即刻与延迟制备桩道对根尖封闭的影响。
130颗单根牙经生物力学预备后，用单锥牙胶和4种封闭剂进行充填：Endoflas FS、AH Plus、Gutta flow和MTA。牙齿随机分为八组，I、III、IV和VII组即刻使用Gates Glidden钻制备桩道。II、IV、VI和VIII组在将标本置于100%湿度环境中保存一周后制备。样本置于亚甲蓝染料中，以3000 rpm离心3分钟，然后切片，在体视显微镜下测量根尖渗漏情况。
数据采用单因素方差分析和Tukey检验进行分析。
所有标本均显示染料渗漏，除Gutta flow外，所有组之间均存在统计学显著差异（>0.05）。
即刻制备桩道时渗漏较少。
