INTRODUCTION: This study examined the effect of vapor lock on canal debridement efficacy by testing the null hypothesis that there is no difference between a "closed" and an "open" system design in smear layer and debris removal by using a side-vented needle for irrigant delivery. METHODS: Roots in the closed system were sealed with hot glue and embedded in polyvinylsiloxane to restrict fluid flow through the apical foramen during cleaning and shaping. For the open system, the apical foramen was enlarged and connected to the external environment via a channel within the polyvinylsiloxane to permit unrestricted fluid flow. Smear and debris scores were evaluated by using scanning electron microscopy and analyzed by using Cochran-Mantel-Haenszel statistic. RESULTS: No difference in smear scores was detected between the 2 systems at all canal levels. Significant differences in debris scores between the 2 systems were found at each canal level: coronal (P < .001), middle (P < .001), and apical (P < .001). CONCLUSIONS: The null hypothesis was rejected; presence of an apical vapor lock effect adversely affects debridement efficacy. Thus, studies with unspecified or questionable mechanisms to restrict fluid flow through the apical foramen have to be interpreted with caution. Copyright (c) 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
INTRODUCTION: This study examined the effect of vapor lock on canal debridement efficacy by testing the null hypothesis that there is no difference between a "closed" and an "open" system design in smear layer and debris removal by using a side-vented needle for irrigant delivery. METHODS: Roots in the closed system were sealed with hot glue and embedded in polyvinylsiloxane to restrict fluid flow through the apical foramen during cleaning and shaping. For the open system, the apical foramen was enlarged and connected to the external environment via a channel within the polyvinylsiloxane to permit unrestricted fluid flow. Smear and debris scores were evaluated by using scanning electron microscopy and analyzed by using Cochran-Mantel-Haenszel statistic. RESULTS: No difference in smear scores was detected between the 2 systems at all canal levels. Significant differences in debris scores between the 2 systems were found at each canal level: coronal (P < .001), middle (P < .001), and apical (P < .001). CONCLUSIONS: The null hypothesis was rejected; presence of an apical vapor lock effect adversely affects debridement efficacy. Thus, studies with unspecified or questionable mechanisms to restrict fluid flow through the apical foramen have to be interpreted with caution. Copyright (c) 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
Authors: L Susin; Y Liu; J C Yoon; J M Parente; R J Loushine; D Ricucci; T Bryan; R N Weller; D H Pashley; F R Tay Journal: Int Endod J Date: 2010-08-19 Impact factor: 5.264
Authors: Chen Yuanyuan; Zhang Wenhui; Guo Bin; Guo Xiaolong; Huang Shilu; Long Hu; Fu Min; Yang Manxin; Lü Yan Journal: Hua Xi Kou Qiang Yi Xue Za Zhi Date: 2015-04
Authors: Andrea F Campello; Marília F Marceliano-Alves; José F Siqueira; Simone C Fonseca; Ricardo T Lopes; Flávio R F Alves Journal: Clin Oral Investig Date: 2021-04-26 Impact factor: 3.573
Authors: Prabu Mahin Syed Ismail; Siddiq Ahamed; P B Sabiha; M Chandra Sekhar; Gopikrishna Moosani; S Nagalakshmi Reddy; N Upendranatha Reddy; C H Sumanthi Journal: J Clin Diagn Res Date: 2016-12-01