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An evaluation of the use different techniques of the thermoplasticized obturators on the coronal seal

Authors: Mervat M. Al-Bakri ميرفت البكري --- Hussain F. Al-Huwaizi حسين فيصل الحويزي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 18-20
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The aim of the present study was to evaluate coronal leakage of root canals obturated by varioustechniques.Methodology: Straight single rooted teeth with mature apices (6 groups of 10 teeth each). Root canals wereprepared according to the crown down technique using hand ProTaper system. Endofill root canal sealer and 2.5%sodium hypochlorite was used. Root canals were obturated using cold lateral condensation Thermafil and Soft Coreobturation after root canal filling the six groups was divided into two individual groups of 30 teeth. The first group of 30teeth was kept for 1 week the second 3 week at 37 oC. Teeth were immersed in india ink. Each was split andsectioned longitudinally and the maximum extent of leakage was measured using a stereomicroscopeResults: Leakage occurred whatever filling technique was used the number of teeth with gross leakage decreasedwith time up to 3 weeks. There were significant differences in coronal leakage between the various obturationtechniques after 1 week, and after 3 weeks. No statistically significant differences were found between soft-Core andcold lateral condensation after 1 week and statistically significant differences were found after 3 weeks. There werestatistically significant differences between Thermafil and lateral condensation after 1 week and no statisticallysignificant differences after 3 weeks.Conclusion: Under the conditions of the present study none of the gutta-percha obturation techniques preventedcoronal leakage. Coronal leakage increased during the first week for CLC, Thermafil and Soft-Core obturators, anddecreased after 3 weeks. Coronal leakage in the Soft-Core obturators was higher than Thermafil and CLC after oneweek. Thermafil coronal leakage was lower than others after one week. Coronal leakage in the Soft-Core obturatorshigher than Thermafil and CLC after three weeks coronal leakage was equal in Thermafil and CLC after three weeks

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