Jing Guo1, Arjang Vahidnia1, Parish Sedghizadeh1, Reyes Enciso2. 1. Ostrow School of Dentistry, University of Southern California, Los Angeles, California. 2. Ostrow School of Dentistry, University of Southern California, Los Angeles, California. Electronic address: renciso@usc.edu.
Abstract
INTRODUCTION: The purpose of this study was to evaluate the number of roots and canal morphology of maxillary permanent first molars in a North American population. METHODS: Three hundred seventeen cases with bilateral maxillary first molars were included. All images from cone-beam computed tomography were carefully reviewed by 2 endodontists. Frequency of number of roots, presence of an additional mesiobuccal canal (MB2), and Vertucci canal type for each root were tabulated. Age, gender, and ethnicity differences were calculated with the χ(2) test. The intra-rater reliability was assessed by using the Cohen kappa statistic. RESULTS: The fused root rate was 0.9%. The occurrence of 3-rooted maxillary first molars differed between left and right sides (P = .03). MB2 occurrence only showed statistically significant differences among age groups (P = .005). In the mesiobuccal roots, the most common Vertucci classifications of canal types were type IV (2-2, 41.9%), type I (1, 28.3%), and type II (2-1, 26.3%). There was a statistically significant difference in Vertucci classification of canal type among 5 ethnic groups (African American, Asian, Hispanic, Other, and Non-Hispanic white, P < .001). CONCLUSIONS: Cone-beam computed tomography facilitates the identification of root and canal configuration. The information gained about the tooth anatomy and canal morphology before treatment could potentially facilitate root canal therapy.
INTRODUCTION: The purpose of this study was to evaluate the number of roots and canal morphology of maxillary permanent first molars in a North American population. METHODS: Three hundred seventeen cases with bilateral maxillary first molars were included. All images from cone-beam computed tomography were carefully reviewed by 2 endodontists. Frequency of number of roots, presence of an additional mesiobuccal canal (MB2), and Vertucci canal type for each root were tabulated. Age, gender, and ethnicity differences were calculated with the χ(2) test. The intra-rater reliability was assessed by using the Cohen kappa statistic. RESULTS: The fused root rate was 0.9%. The occurrence of 3-rooted maxillary first molars differed between left and right sides (P = .03). MB2 occurrence only showed statistically significant differences among age groups (P = .005). In the mesiobuccal roots, the most common Vertucci classifications of canal types were type IV (2-2, 41.9%), type I (1, 28.3%), and type II (2-1, 26.3%). There was a statistically significant difference in Vertucci classification of canal type among 5 ethnic groups (African American, Asian, Hispanic, Other, and Non-Hispanic white, P < .001). CONCLUSIONS: Cone-beam computed tomography facilitates the identification of root and canal configuration. The information gained about the tooth anatomy and canal morphology before treatment could potentially facilitate root canal therapy.
Authors: Ronald Ordinola-Zapata; Jorge N R Martins; Hugo Plascencia; Marco A Versiani; Clovis M Bramante Journal: Clin Oral Investig Date: 2020-05-07 Impact factor: 3.573
Authors: Margarete B McGuigan; Christie Theodorakou; Henry F Duncan; Jonathan Davies; Anita Sengupta; Keith Horner Journal: Dentomaxillofac Radiol Date: 2020-06-22 Impact factor: 2.419
Authors: Paul Monsarrat; Bertrand Arcaute; Ove A Peters; Elisabeth Maury; Norbert Telmon; Marie Georgelin-Gurgel; Delphine Maret Journal: PLoS One Date: 2016-10-20 Impact factor: 3.240