Angambakkam Rajasekaran PradeepKumar1, Hagay Shemesh2, Jeffrey Wen-Wei Chang3, Ahendita Bhowmik4, Swamy Sibi4, Velayutham Gopikrishna4, Lakshmikanthanbharathi Lakshmi-Narayanan4, Anil Kishen5. 1. Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College and Hospital, Dr MGR Educational and Research Institute University, Chennai, India. Electronic address: arpradeep@vsnl.com. 2. Department of Endodontology, Academic Centre for Dentistry Amsterdam, Amsterdam, The Netherlands. 3. Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong. 4. Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College and Hospital, Dr MGR Educational and Research Institute University, Chennai, India. 5. Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
Abstract
INTRODUCTION: This study evaluated the prevalence, location, and pattern of preexisting dentinal microcracks in roots of extracted teeth without endodontic treatment in patients from 2 age groups using micro-computed tomographic imaging. METHODS: Six hundred thirty-three nonendodontically treated teeth extracted using an atraumatic procedure because of reasons unrelated to this study were collected and divided based on the patient age. Teeth were scanned with micro-computed tomographic imaging (resolution of 26.7 μm) to examine the presence of preexisting dentinal microcracks in roots. The characteristic features of preexisting dentinal microcracks determined were location, extent, length, and coronoapical distribution. Chi-square bivariate analysis was performed to assess the association between various parameters. RESULTS: Forty-five of 633 nonendodontically treated teeth exhibited preexisting microcracks in roots with a prevalence of 7.1%. The prevalence of preexisting microcracks was found to be 8.3% in older patients (40-70 years) compared with 3.7% in younger patients (20-39 years) (P < .050). A significant association was found between the preexisting microcracks in mandibular teeth (10.3%) when compared with maxillary teeth (2.9%) (P < .001). All preexisting microcracks were located mesiodistally; 66% occurred in the cervical and middle thirds of root. Only 33% of the preexisting microcracks were complete in nature, showing canal involvement. Complete dentinal microcracks exhibited a mean length of 6.9 mm, whereas incomplete cracks had a mean length of 3.75 mm (P < .001). CONCLUSIONS: Preexisting dentinal microcracks in roots of nonendodontically treated teeth occurred more often in older patients (40-70 years) in the mesiodistal direction. They were predominantly found in the cervical and middle thirds of root and were more likely to be incomplete in nature.
INTRODUCTION: This study evaluated the prevalence, location, and pattern of preexisting dentinal microcracks in roots of extracted teeth without endodontic treatment in patients from 2 age groups using micro-computed tomographic imaging. METHODS: Six hundred thirty-three nonendodontically treated teeth extracted using an atraumatic procedure because of reasons unrelated to this study were collected and divided based on the patient age. Teeth were scanned with micro-computed tomographic imaging (resolution of 26.7 μm) to examine the presence of preexisting dentinal microcracks in roots. The characteristic features of preexisting dentinal microcracks determined were location, extent, length, and coronoapical distribution. Chi-square bivariate analysis was performed to assess the association between various parameters. RESULTS: Forty-five of 633 nonendodontically treated teeth exhibited preexisting microcracks in roots with a prevalence of 7.1%. The prevalence of preexisting microcracks was found to be 8.3% in older patients (40-70 years) compared with 3.7% in younger patients (20-39 years) (P < .050). A significant association was found between the preexisting microcracks in mandibular teeth (10.3%) when compared with maxillary teeth (2.9%) (P < .001). All preexisting microcracks were located mesiodistally; 66% occurred in the cervical and middle thirds of root. Only 33% of the preexisting microcracks were complete in nature, showing canal involvement. Complete dentinal microcracks exhibited a mean length of 6.9 mm, whereas incomplete cracks had a mean length of 3.75 mm (P < .001). CONCLUSIONS: Preexisting dentinal microcracks in roots of nonendodontically treated teeth occurred more often in older patients (40-70 years) in the mesiodistal direction. They were predominantly found in the cervical and middle thirds of root and were more likely to be incomplete in nature.
Authors: Michael Solomonov; Hyeon-Cheol Kim; Avi Hadad; Dan Henry Levy; Joe Ben Itzhak; Oleg Levinson; Hadas Azizi Journal: Restor Dent Endod Date: 2020-03-04