Effect of temperature on the ability of XP-Endo Finisher to remove calcium hydroxide from root canal irregularities: ex vivo

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Abstract
En tr Objective : The purpose of this study was to evaluate the effects of different environment temperatures and irrigation solution temperatures on the calcium hydroxide (CH) removal efficacy of XP-Endo Finisher from root canal irregularities. Materials and Method : Eighty-three teeth were instrumented and split longitudinally. Two standard grooves (apical and coronal) were prepared, and the roots were randomly divided into five experimental groups (n=15), a positive control group (n=4), and a negative control group (n=4). The grooves were filled with CH, the root halves were re-assembled; the canal space was also filled with CH, and the teeth were stored for 14 days. Fourteen days later, CH was removed using one of the following irrigation protocols, where environmental temperature for Groups 1-4 and Group 5 were 37 °C and 21 °C, respectively: Group 1: Conventional needle irrigation with NaOCl at 21 °C; Group 2: Conventional needle irrigation with NaOCl at 37 °C; Group 3: XP-Endo Finisher with NaOCl at 21 °C; Group 4: XP-Endo Finisher with NaOCl at 37 °C; Group 5: XP-Endo Finisher with NaOCl at 21 °C. The amount of remaining CH after removal was examined and scored by using a stereomicroscope. The statistical evaluation was performed using Kruskal–Wallis and Mann–Whitney U tests with Bonferroni-correction. Results : Group 3 and 4 removed significantly more CH than the other groups in the apical region (p0.05). The removal of CH was not affected by the irrigation solution temperature (p>0.05); but was significantly affected by the environmental temperature (Group 3 versus Group 5; pversus Groups 1 and 2; p0.05) ancak çevre sıcaklığından (Grup 3’e karşı Grup 5; p<0.05) ve KH uzaklaştırma tekniğinden (Grup 3 ve 4’e karşı Grup 1 ve 2; p<0.05) önemli derecede etkilendi. Sonuç NaOCl solüsyonunun sıcaklığı XP-Endo Finisher’ın KH kaldırma etkinliğinde önemli bir rol oynamazken, çevre sıcaklığı etkinliğini arttırdı.

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