Evaluation of mandibular lingula and foramen location using 3-dimensional mandible models reconstructed by cone-beam computed tomography
Zhou Cong, Jeon Tae-Hyun, 전상호, 권종진,
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( Zhou Cong ) - Shandong University Stomatological Hospital School of Stomatology
( Jeon Tae-Hyun ) - Korea University Anam Hospital Department of Oral and Maxillofacial Surgery
전상호 ( Jun Sang-Ho ) - Korea University Anam Hospital Department of Oral and Maxillofacial Surgery
권종진 ( Kwon Jong-Jin ) - Korea University
Abstract
Background: The positions of the mandibular lingula and foramen have been set as indexes for inferior alveolar nerve (IAN) block and ramus osteotomies in orthognathic surgery. This study aimed to evaluate the anatomical structures of mandibular ramus, especially the mandibular lingula and foramen, by analyzing the cone-beam computed tomography (CBCT) data of young adults.
Methods: We evaluated 121 sides of hemi-mandibular CBCT model of 106 patients (51 male and 55 female patients; 18 to 36 years old). All the measurements were performed using the 2- and 3-dimensional rulers of OnDemand3D® software.
Results: Statistical analysis of the data revealed that there was no significant difference in the mandibular angle between the genders. The mandibular lingula was found to be located at the center of ramus in males, but a little posterior in relation to the center in females. The mandibular lingula was rarely located below the occlusal plane; however, the position of the mandibular foramen was more variable (84.3% below, 12.4% above, and 3.3% at the level of the occlusal plane).
Conclusions: The results of this study provide a valuable guideline for IAN block anesthesia and orthognathic surgery. CBCT can be considered effective and accurate in evaluating the fine structures of the mandible.
키워드
3D Anatomy; Mandibular ramus; Lingula; Foramen; Cone-beam CT
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