Anat Cell Biol.  2020 Sep;53(3):252-260. 10.5115/acb.20.079.

An anatomical study on locations of the mandibular foramen and the accessory mandibular foramen in the mandible and their clinical implication in a Thai population

• Thunyacharoen S
• Lymkhanakhom S
• Chantakhat P
• Suwanin S
• Sawanprom S
• Iamaroon A
• Janhom A
• Mahakkanukrauh P

• KMID: 2507637
• DOI: http://doi.org/10.5115/acb.20.079

Abstract

Mandibular foramen (MF) is a structure that inferior alveolar nerve and artery pass through itself which is found on the mandible. The objective of this research aims to locate MF among the Thai population including other MF characteristics. The sampling is conducted in the Thai population of the total number of 220 samples from the Forensic Osteology Research Center, Faculty of Medicine, Chiang Mai University. The MF anteroposterior and superoinferior localizations are similar in both sex which at Q₃ of right anteroposterior, Q₂ of left anteroposterior and Q₂ of left and right superoinferior axis. Otherwise, the prevalence of accessory MF has in 68 samples which are 30.89%. The prevalence of unilateral single accessory MF is 20.45%, bilateral single accessory MF is 6.36%, unilateral double accessory MF is 2.27% and bilateral double accessory MF is 0.45%. This present research results that the Thai population has a difference in MF location while comparing to other populations. Moreover, Thai MF and accessory MF location and localization will be helpful to clinical implications.

Keyword

Mandibular foramen; Inferior alveolar nerve block

Figure

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  Fig. 1 Parameters measurements from various anatomical landmarks to MF. 1. MF-AB: distance from the midpoint of the MF to the AB of the ramus on occlusion plane. 2. MF-PB: distance from the midpoint of the MF to the PB of the ramus on occlusion plane. 3. AB-PB: distance from the AB of the ramus on occlusion plane to the PB of ramus passing midpoint of the MF or the summation of MF-AB and MF-PB. 4. MF-MN: distance from the midpoint of the MF to the lowest point of the MN. 5. MF-IB: distance from the midpoint of the MF to the IB limited to the base of the mandible. 6. MN-IB: distance from the lowest point of the MN to the IB limited to the base of mandible passing midpoint of the MF or the summation of MF-MN and MF-IB. AB, anterior border; IB, inferior border; MF, mandibular foramen; MN, mandibular notch; PB, posterior border; ‾ ‾ ‾, occlusion plane; ●, midpoint of the MF.

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  Fig. 2 Mandibular foramen localization in anteroposterior and superoinferior axes.

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  Fig. 3 Accessory mandibular foramen observation. A, mandibular foramen; B, accessory mandibular foramen.

Reference

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