Analysis of the Mental Foramen and Inferior Alveolar Canal pattern based on CBCT data
Keywords:Anterior loop, CBCT, Mental Foramen, Pattern Position
The mental foramen is located in a position where certain dental procedures may cause inadvertent damage to the mental nerve and lead to disorders of sensory functions such as altered sensa¬tion, complete numbness, and neuropathic pain, which are uncommon but severe treatment complications with significant medico-legal implications. Hence thorough knowledge of its anatomical relation to its surrounding structures is critical while undertaking dental procedures. To investigate the size, shape, and position of the mental
foramen (MF), its distance from adjacent teeth and mandibular borders, and the pattern of the inferior alveolar canal using CBCT in the Indian subpopulation. This was a retrospective, cross-sectional study The study evaluated 310 CBCT scans (179 males, 131
females) in axial, sagittal, and coronal planes. CBCT scans were evaluated, mapped and measured for all the parameters listed above based on age and sex. Data were analyzed using ANOVA, independent‘t-test, and chi-square test. The size of MF is independent of age and sex; the most frequent shape of MF was Type III (round); location was below the apex of the second premolar (p>0.05). The
distance of MF from the nearest root apex decreased with an increase in age and more in females than males (p>0.05). Inferior Alveolar Nerve Canal (IAC) pattern was perpendicular, and linear patterns of exit at MF were more common than anterior loops in all age groups.
Singh B, Sharma K. Trigeminal Nerve-Anatomy, Testing & Diseases: A Review. Arch Neurol Neurol Disord. 2019; 2:112- 17.
Zmyslowska-Polakowska E, Radwanski M, Ledzion S, Leski M, Zmyslowska A, Lukomska-Szymanska M. Evaluation of size and location of a mental foramen in the polish population using cone-beam computed tomography. BioMed Res Int.2019; 2019:1-8.
doi: 10.1155/2019/1659476. PMID: 30719439
Rezaei F, Bahrampour E, Alizadeh S, Imani MM. Assessment of Vertical and Horizontal Position of Mental Foramen in a Subpopulation of Kermanshah City by Panoramic Radiographs. J Medi Dent Sci. 2018; 6:459-65. doi.org/10.2174%2F1874210601509010297
Mohammad ZK, Shadid R, Kaadna M, Qabaha A, Muhamad AH. Position of the Mental Foramen in a Northern Regional Palestinian Population. Int J Oral Craniofac Sci.2016; 2:057-064. doi.org/10.17352/2455-4634.000020
Gershenson A, Nathan H, Luchansky E. Mental foramen and mental nerve: changes with age. Cells Tissues Organs.Acta Anat (Basel) 1986; 126:21-8. doi.org/10.1159/000146181
Al-Mahalawy H, Al-Aithan H, Al-Kari B, Al-Jandan B, Shujaat S. Determination of the position of mental foramen and frequency of anterior loop in Saudi population. A retrospective CBCT study. Saudi Dent J. 2017; 29:29-35. doi.org/10.1016/j.sdentj.2017.01.001
Iyengar AR, Patil S, Nagesh KS, Mehkri S, Manchanda A. Detection of anterior loop and other patterns of entry of mental nerve into the mental foramen: A radiographic study in panoramic images. J Dent Impl. 2013; 3:21. doi.org/10.1016%2Fj.sdentj.2017.01.001
Hu KS, Yun HS, Hur MS, et al., Branching patterns and intraosseous course of the mental nerve. J Oral Maxillofac Surg. 2007; 65:2288–94.
Nair UP, Yazdi MH, Nayar GM, Parry H, Katkar RA, Nair MK. Configuration of the inferior alveolar canal as detected by cone beam computed tomography. J Conserv Dent. 2013; 16:518-21. doi.org/10.4103%2F0972-0707.120964
Greenstein G, Tarnow D. The mental foramen and nerve: clinical and anatomical factors related to dental implant placement: a literature review. J Periodont. 2006; 77:1933-43. doi.org/10.1902/jop.2006.060197
Vujanovic-Eskenazi A, Valero-James JM, Sánchez-Garcés MA, Gay-Escoda C. A retrospective radiographic evaluation of the anterior loop of the mental nerve: comparison between panoramic radiography and cone beam computerized tomography. Med Oral Pataol Oral Cir Bucal. 2015; 20:e239-245. doi: 10.4317/medoral.20026
E. M. O. Junior, A. L. Ara´ujo, C. M. Da Silva, C. F. Sousa-Rodrigues, and F. J. Lima, “Morphological and Morphometric Study of the Mental Foramen on the M-CP-18 JiachenjiangnPoint. Int J Morphol. Int. J. Morphol. , 2009; 27:231-238. https://citeseerx.ist.psu.edu/viewdoc/
download?doi=10.1.1.880.2795&rep=rep1&type=pdfTable VI: Prevalence of inferior alveolar canal patternLeft Side Right SideLinearN (%)
PerpendicularN (%)ALN (%)LinearN (%)PerpendicularN (%)ALN (%)Age 20-45 92 (40.4) 115 (50.4) 21 (9.2) 98 (43) 113 (49.6) 17 (7.5)46-60 34 (54.8) 21 (33.9) 7 (11.3) 30 (48.4) 29 (46.8) 3 (4.8)>60 15 (75) 5 (25) 0 (0) 6 (30) 11 (55) 3 (15)p value 0.009* 0.473sex Male 79 (44.1) 84 (46.9) 16 (8.9) 75 (41.9) 92 (51.4) 12 (6.7)Female 57 (43.5) 62 (47.3) 12 (9.2) 59 (45) 61 (46.6) 11 (8.4)p value 0.832 0.663Chi-square test; * indicates significant at p≤0.05 (significant)RESEARCH < 9
L. Zhang and Q. Zheng, “Anatomic Relationship between Mental Foramen and Peripheral Structures Observed By Cone- Beam Computed Tomography. Anat Physiol. 2015; 5: 182. https://www.longdom.org/open-access/anatomic-relationship-betweenmental-foramen-and-peripheral-structures-observed-by-conebeam-computedtomography-22501.html
Ahlgren FK, Johannessen AC, Hellem S. Displaced calcium hydroxide paste causing inferior alveolar nerve paraesthesia: report of a case. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2003; 96:734-7. doi.org/10.1016/j.tripleo.2003.08.018
Ahonen M, Tjäderhane L. Endodontic-related paresthesia: a case report and literature review. J Endod. 2011; 37:1460-4. doi.org/10.1016 /j.joen .2011.06.016
Resnik RR. Neurosensory Deficit Complications in Implant Dentistry. Misch’s Avoiding Complications in Oral Implantology. Elsevier. 2018; 329-63.
Aminoshariae, A., Su, A., Kulild, J.C. Determination of the location of the mental foramen: a critical review. J Endod.2014; 40; 471–75.
Sankar DK, Bhanu SP, Susan PJ. Morphometrical and morphological study of mental foramen in dry dentulous mandibles of South Andhra population of India. Indian J Dent Res. 2011. 22:542. https://www.ijdr.in/article.asp?issn=09709290 ;year=2011;volume=22;issue=4;
A. Sekerci, H. Sahman, Y. Sisman, and Y. Aksu, “Morphometric analysis of the mental foramen in a Turkish population based on multi-slice computed tomography,” J Oral Maxillofac Radiol.2013; 1: 2-7. doi.org/10.4103/2321-3841.111341
M.K. Alam, S. Alhabib, B. K. Alzarea et al., “3D CBCT morphometric assessment of mental foramen in Arabic population andglobal comparison: imperative for invasive and non-invasive procedures in mandible,” Acta Odontologica.2018; 76:98-104. doi.org/10.1080/00016357. 2017.1387813
Von Arx T, Friedli M, Sendi P, Lozanoff S, Bornstein MM. Location and dimensions of the mental foramen: a radiographic analysis by using cone-beam computed tomography. J Endod. 2013; 39:1522-28. doi.org/10.1016/j.joen.2013.07.033
Suragimath A, Suragimath G, Murlasiddiah SK. Radiographic location of mental foramen in a randomly selected population of Maharashtra. J Indian Acad Oral Med Radiol 2016; 28:11-16. https://www.jiaomr.in/article.asp?issn=09721363; year=2016;volume=28;issue=1;
Rani A, Kanjani V, Kanjani D, Annigeri RG. Morphometric assessment of mental foramen for gender prediction using panoramic radiographs in the West Bengal population-A retrospective digital study. J. Adv. Clin. Res. Insights. 2019; 6:63-6. doi.org/10.15713/ins.jcri.262
Pramstraller M, Schincaglia GP, Vecchiatini R, Farina R, Trombelli L. Alveolar ridge dimensions in mandibular posterior regions: a retrospective comparative study of dentate and edentulous sites using computerized tomography data. Surgical and
Radiologic Anatomy. 2018 Dec;40(12):1419-28
Apostolakis, D., Brown, J.E. The anterior loop of the inferior alveolar nerve: prevalence, measurement of its length and a recommendation for interforaminal implant installation based on cone beam CT imaging. Clin Oral Implan Res.2012; 23:1022–30. doi.org/10.1111/j.1600-0501.2011.02261.x
Sridhar M, Dhanraj M, Thiyaneswaran N, Jain AR. A retrospective radiographic evaluation of incisive canal and anterior loop of mental nerve using cone beam computed tomography. Drug Invention Today. 2018; 10:1656-60. https://healthdocbox.com/Dental_Care/112957124-A-retrospective-radiographicevaluation-of-incisive-canal-and-anterior-loop-of-mental-nerve-using-cone-beamcomputed-tomography.html
Hasan T. Mental foramen morphology: A must know in clinical dentistry. J Pak Dent Assoc. 2012; 21:00-00.https://www.researchgate.net/ publication/233790049_Morphology_of_the_mental_foramena_must_know_in_clinical_dentistry
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