Maxillofac Plast Reconstr Surg.  2017 Oct;39(10):30. 10.1186/s40902-017-0128-y.

Evaluation of mandibular lingula and foramen location using 3-dimensional mandible models reconstructed by cone-beam computed tomography

• Zhou C
• Jeon TH
• Jun SH
• Kwon JJ

• KMID: 2395285
• DOI: http://doi.org/10.1186/s40902-017-0128-y

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.

Keyword

3D Anatomy; Mandibular ramus; Lingula; Foramen; Cone-beam CT

MeSH Terms

Anesthesia
Cone-Beam Computed Tomography*
Dental Occlusion
Female
Humans
Male
Mandible*
Mandibular Nerve
Orthognathic Surgery
Osteotomy
Young Adult