Morphotypes of the apical constriction of maxillary molars: a micro-computed tomographic evaluation.

Autor:	Chang JW; Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong., Manigandan K; Department of Conservative Dentistry and Endodontics, Sri Ramachandra Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University), Chennai, TN, India., Samaranayake L; Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong., NandhaKumar C; Department of Conservative Dentistry and Endodontics, SRM Dental College, SRM University (Deemed to be University) Ramapuram, Chennai, TN, India., AdhityaVasun P; Adhish Multispeciality Dental Clinic, Chennai, TN, India., Diji J; Adhish Multispeciality Dental Clinic, Chennai, TN, India., PradeepKumar AR; Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College and Hospital, Dr. MGR Educational and Research Institute (Deemed to be University), Chennai, TN, India.
Jazyk:	angličtina
Zdroj:	Restorative dentistry & endodontics [Restor Dent Endod] 2022 Mar 24; Vol. 47 (2), pp. e19. Date of Electronic Publication: 2022 Mar 24 (Print Publication: 2022).
DOI:	10.5395/rde.2022.47.e19
Abstrakt:	Objectives: The aim of this study was to evaluate and compare the apical constriction (AC) and apical canal morphology of maxillary first and second molars, using micro-computed tomography (micro-CT). Materials and Methods: The anatomical features of 313 root canals from 41 maxillary first molars and 57 maxillary second molars of patients with known age and sex were evaluated using micro-CT, with a resolution of 26.7 µm. The factors evaluated were the presence or absence of AC, the morphotypes, bucco-lingual dimension, mesio-distal dimension, and the profile (shape) of AC and the apical root canal. The apical root canal dimensions, location of the apical foramen (AF), AC to AF distance, and presence of accessory canals in the apical 5 mm were also assessed. Descriptive and analytical statistics were used for data evaluation. Results: AC was present in all 313 root canals. Patients' age and sex did not significantly impact either AC or the apical canal dimensions. The most common AC morphotype detected was the traditional (single) constriction (52%), followed by the parallel (29%) morphotype. The mean AC dimensions in maxillary first molars were not significantly different from those in maxillary second molars. Sixty percent of AF were located within 0.5 mm from the anatomic apex. Conclusions: The most common morphotype of AC detected was the traditional constriction. Neither patients' age nor sex had a significant impact on the dimensions of the AC or the apical root canal. The majority of AF (60%) were located within 0.5 mm from the anatomic apex. Competing Interests: Conflict of Interest: No potential conflict of interest relevant to this article was reported. (Copyright © 2022. The Korean Academy of Conservative Dentistry.)
Databáze:	MEDLINE
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