Examination of presence and location of the accessory mental foramen, and its implications on the mental nerve block

Year 2021, Volume: 15 Issue: 2, 127 - 131, 31.08.2021

Fatma Sevmez İlhan Bahşi Mustafa Orhan

Abstract

Objectives: It is clinically essential to know the location of accessory mental foramen in the mental nerve anesthesia. The aim of this study was to determine the frequency of accessory mental foramen and examining its morphometric properties.
Methods: A total of 35 adult mandibles of unknown age, gender, and ethnicity were examined. The presence of accessory mental foramen of the mandible was investigated bilaterally. In cases with the accessory mental foramen, its localization, number, and distance relative to the mental foramen were evaluated.
Results: Eleven (15.71%) accessory mental foramens were detected in the 35 mandibles (70 sides) examined. Six (54.55%) of the accessory mental foramens were on the left side, and 5 (45.45%) were on the right side.
Conclusion: Knowing the frequency and localization of the accessory mental foramen will make the mental nerve block more effective and facilitate surgical procedures. It should be kept in mind that the presence of accessory mental foramen should be considered in cases where mental nerve block applications are insufficient.

Keywords

accessory mental foramen, mental foramen, mental nerve block

References

• Bahsi I, Orhan M, Kervancioglu P, Yalcin ED. Morphometric evaluation and clinical implications of the greater palatine foramen, greater palatine canal and pterygopalatine fossa on CBCT images and review of literature. Surg Radiol Anat 2019;41:551–67.
• Xiao L, Pang W, Bi H, Han X. Cone beam CT-based measurement of the accessory mental foramina in the Chinese Han population. Experimental and Therapeutic Medicine 2020;20:1907–16.
• Caglayan F, Sumbullu MA, Akgul HM, Altun O. Morphometric and morphologic evaluation of the mental foramen in relation to age and sex: an anatomic cone beam computed tomography study. J Craniofac Surg 2014;25:2227–30.
• Rahpeyma A, Khajehahmadi S. Accessory mental foramen and maxillofacial surgery. J Craniofac Surg 2018;29:e216–7.
• Sevmez F, Orhan M, Bahsi I, Yalcin ED. Examination of the safe zone in mandibular ramus osteotomies. J Craniofac Surg 2021;32:2219–22.
• Orhan AI, Orhan K, Aksoy S, Ozgul O, Horasan S, Arslan A, Kocyigit D. Evaluation of perimandibular neurovascularization with accessory mental foramina using cone-beam computed tomography in children. J Craniofac Surg 2013;24:e365–9.
• Torres MG, Valverde Lde F, Vidal MT, Crusoe-Rebello IM. Accessory mental foramen: a rare anatomical variation detected by cone-beam computed tomography. Imaging Sci Dent 2015;45:61–5.
• Kalender A, Orhan K, Aksoy U. Evaluation of the mental foramen and accessory mental foramen in Turkish patients using cone-beam computed tomography images reconstructed from a volumetric rendering program. Clin Anat 2012;25:584–92.
• Greenstein G, Tarnow D. The mental foramen and nerve: clinical and anatomical factors related to dental implant placement: a literature review. J Periodontol 2006;77:1933–43.
• Imada TS, Fernandes LM, Centurion BS, de Oliveira-Santos C, Honorio HM, Rubira-Bullen IR. Accessory mental foramina: prevalence, position and diameter assessed by cone-beam computed tomography and digital panoramic radiographs. Clin Oral Implants Res 2014;25:e94–9.
• Ulu M, Tarim Ertas E, Gunhan F, Yircali Atici M, Akcay H. Unilateral absence of mental foramen with surgical exploration in a living human subject. Case Rep Dent 2016;1971925.
• Matsumoto K, Araki M, Honda K. Bilateral absence of the mental foramen detected by cone-beam computed tomography. Oral Radiology 2012;29:198–201.
• da Silva Ramos Fernandes LM, Capelozza AL, Rubira-Bullen IR. Absence and hypoplasia of the mental foramen detected in CBCT images: a case report. Surg Radiol Anat 2011;33:731–4.
• Simonton FV. Mental foramen in the anthropoids and in man. Am J Phys Anthropol 1923;6:413–21.
• von Arx T, Lozanoff S, Bosshardt D. Accessory mental foramina: anatomy and histology of neurovascularisation in four cases with apical surgery. Oral Surgery 2014;7:216–27.
• Lam M, Koong C, Kruger E, Tennant M. Prevalence of accessory mental foramina: a study of 4,000 CBCT scans. Clin Anat 2019;32:1048–52.
• Neves FS, Nascimento MC, Oliveira ML, Almeida SM, Boscolo FN. Comparative analysis of mandibular anatomical variations between panoramic radiography and cone beam computed tomography. Oral Maxillofac Surg 2014;18:419–24.
• Capote TS, Goncalves Mde A, Campos JA. Retromolar canal associated with age, side, sex, bifid mandibular canal, and accessory mental foramen in panoramic radiographs of Brazilians. Anat Res Int 2015;434083.
• Singh R. Evaluation of position, shape, size and incidence of mental foramen and accessory mental foramen in Indian adult human skulls. Anatomy 2011;5:23–9.
• Katakami K, Mishima A, Shiozaki K, Shimoda S, Hamada Y, Kobayashi K. Characteristics of accessory mental foramina observed on limited cone-beam computed tomography images. J Endod 2008; 34:1441–5.
• Ucar H, Bahsi I, Orhan M, Yalcin ED. The radiological evaluation of the crista galli and its clinical implications for anterior skull base surgery. J Craniofac Surg 2021;32:1928–30.
• Bahsi I, Orhan M, Kervancioglu P, Yalcin ED, Aktan AM. Anatomical evaluation of nasopalatine canal on cone beam computed tomography images. Folia Morphol (Warsz) 2019;78:153–62.
• Bahsi I. An anatomic study of the supratrochlear foramen of the humerus and review of the literature. European Journal of Therapeutics 2019;25:295–303.
• Oliveira-Santos C, Souza PH, De Azambuja Berti-Couto S, Stinkens L, Moyaert K, Van Assche N, Jacobs R. Characterisation of additional mental foramina through cone beam computed tomography. J Oral Rehabil 2011;38:595–600.