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Evaluation of the Efficiency of Three Different Obturation Techniques to Obturate the Isthmus Area of Roots Canals Prepared by Two Different Instrumentation Techniques (An In Vitro Study)

Authors: Hasan M. Al-Rammahi حسن الرماحي --- Hussain F. Al-Huwaizi حسين فيصل الحويزي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 2 Pages: 14-18
Publisher: Baghdad University جامعة بغداد


Background: The isthmus is a difficult area in the root canal complex to manage. The research aimed to evaluatethe efficiency of three different obturation techniques (lateral condensation, EandQ (thermoplasticized guttapercha system) and Soft Core (thermoplasticized core carrier gutta percha system)) to obturate the isthmus area ofroots prepared by two different instrumentation techniques (rotary ProTaper universal and ProTaper Next systems).Material and method: Sixty freshly extracted teeth were randomly divided into two main groups (A and B) of 30 teetheach. Group A was prepared by rotary ProTaper Universal whereas group B was prepared by ProTaper Next system.Each main group was then randomly subdivided into three subgroups of 10 teeth each, to be obturated with thethree obturation techniques. All specimens were then placed in cold cure acrylic mold just from the side of thecrown leaving the root unmolded to facilitate the sectioning process, then three sections were obtained from eachspecimen by using microtome at 2, 6 and 10 mm from the apex. Each section was viewed understereomicroscope(40X) and imaged with digital camera(4X). Each image was managed with image J program tocalculate the surface area of the whole isthmus and that of the gutta percha and/or sealer extended into theisthmus so the collected data represented the percentage of extension degree of gutta percha and /or sealer intothe isthmus(EDGS).Results: The highest mean value of (EDGS) was evident with Soft Core technique in the apical area and wassignificantly higher than that of the EandQ and lateral condensation techniques.Conclusion: Under the conditions of this study, Soft Core system showed a higher efficiency in obturating the isthmusarea than the other obturation techniques

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