Endodontology (Jan 2022)
Comparative evaluation of efficacy of XP Endo Finisher, sonic, and ultrasonic irrigation in removal of calcium hydroxide and subsequent adaptation of gutta percha in simulated internal resorption cavity - An in vitro study
Abstract
Aim: The study aims to comparatively evaluate various irrigating techniques in removing calcium hydroxide (CH, aqueous/silicon oil based) from simulated internal resorptive cavity and subsequent adaptability of thermoplasticized gutta percha (GP) to root canal walls. Methods: One hundred and sixty extracted human mandibular second premolars with single root were chemomechanically prepared to a size F3 (size 30, 6% taper). Standardized internal root resorption cavities were prepared, and samples were randomly divided into two main groups (n = 80) according to type of CH medicament used: Group I - silicon oil based (Metapex) and Group II - aqueous based (RC Cal) and four subgroups (n = 20) according to the technique used for removal of CH: Subgroup A - passive ultrasonic irrigation, Subgroup B - XP Endo Finisher (XP), Subgroup C - sonic irrigation, Subgroup D - conventional syringe irrigation. Half of the samples were evaluated for the quantity of remaining CH and the remaining half were evaluated for the adaptability of thermoplasticized GP under a stereomicroscope. The statistical analysis of the obtained scores was done using a nonparametric test, Kruskal–Wallis test, followed by Mann–Whitney U-test. Results: XP showed maximum removal of CH and adaptation of GP in both the groups. Adaptability of GP to the dentinal wall was better in Group II than in Group I. Conclusions: Complete removal of CH (both formulations) was not possible with either of the experimental irrigation techniques from simulated internal root resorptive defects.
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