Maria Rosa Felix de Sousa Gomide Guimarães1, Renata Oliveira Samuel2, Gustav Guimarães1, Emanuelle Karine Prado Nalin1, Renata Tarnoschi Bernardo1, Eloi Dezan-Júnior3, Luciano Tavares Angelo Cintra4. 1. Department of Dentistry, School of Dentistry, University Center São Lucas, Rua Alexandre Guimarães, 1927, Porto Velho, Rondônia, 76804-295, Brazil. 2. Department of Clinical Dentistry, Dental School, UNIUBE - Universidade de Uberaba, Avenida Nene Sabino, 1801, Uberaba, Minas Gerais, 38055-500, Brazil. 3. Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Rua José Bonifácio, 1193, Araçatuba, São Paulo, 16015-050, Brazil. 4. Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Rua José Bonifácio, 1193, Araçatuba, São Paulo, 16015-050, Brazil. lucianocintra@foa.unesp.br.
Abstract
OBJECTIVE: The aim of this study was to evaluate the relationship between length of root canal obturation (RCO) and the presence of apical periodontitis (AP) in different dental groups using cone-beam computed tomography (CBCT) analysis. MATERIALS AND METHODS: A total of 392 roots with canal treatment performed for more than 4 years were evaluated using CBCT. Distances from the apex to the tip of filling material were measured and classified as more than 2 mm short of the apex, approximately 1-2 mm short of the apex, at the apex, and beyond the apex. Odds ratio, confidence interval, and the χ2 test were used for statistical analyses. RESULTS: The frequency of AP was significantly greater in molars than in the other tooth groups (p < 0.05). Moreover, RCO that ended 1-2 mm short of the apex was associated with a lower prevalence of AP in molars and premolars (p < 0.05) and in anterior teeth (p < 0.1) when compared with RCO at the apex, more than 2 mm short of the apex, or beyond the apex. When the RCO reached the apex, there was no difference in the presence of AP among dental groups (p > 0.05). CONCLUSION: The length of RCOs can influence the presence of AP, with molars showing a higher prevalence. RCOs ending 1-2 mm short of the apex are associated with an absence of AP. CLINICAL RELEVANCE: The length of obturation is related to the presence of apical peridontitis and consequently to the success of endodontic treatment.
OBJECTIVE: The aim of this study was to evaluate the relationship between length of root canal obturation (RCO) and the presence of apical periodontitis (AP) in different dental groups using cone-beam computed tomography (CBCT) analysis. MATERIALS AND METHODS: A total of 392 roots with canal treatment performed for more than 4 years were evaluated using CBCT. Distances from the apex to the tip of filling material were measured and classified as more than 2 mm short of the apex, approximately 1-2 mm short of the apex, at the apex, and beyond the apex. Odds ratio, confidence interval, and the χ2 test were used for statistical analyses. RESULTS: The frequency of AP was significantly greater in molars than in the other tooth groups (p < 0.05). Moreover, RCO that ended 1-2 mm short of the apex was associated with a lower prevalence of AP in molars and premolars (p < 0.05) and in anterior teeth (p < 0.1) when compared with RCO at the apex, more than 2 mm short of the apex, or beyond the apex. When the RCO reached the apex, there was no difference in the presence of AP among dental groups (p > 0.05). CONCLUSION: The length of RCOs can influence the presence of AP, with molars showing a higher prevalence. RCOs ending 1-2 mm short of the apex are associated with an absence of AP. CLINICAL RELEVANCE: The length of obturation is related to the presence of apical peridontitis and consequently to the success of endodontic treatment.