Abstract
Background: The coronoid process of mandible is a thin & triangular eminence which is flattened from side to side and varies in shape & size. The different variation in the shape of the coronoid process are like rounded, triangular & hook shaped. These variations occurs may be due to the functional or hereditary changes and has a strong correlation with the mode of attachment of the temporalis muscle. These shapes of the coronoid process acts as an evolutionary marker & is very useful in the anthropological studies as well as in the forensic studies. The coronoid process has also great clinical significance to the maxillofacial surgeons for the reconstructive surgeries. This coronoid process can be easily harvested as a donor bone. Therefore, we study about the incidence of different shapes of coronoid process in the mandible in population of Bihar & compare it with findings of different studies.
Materials & Methods: The present study is a cross sectional study which has been carried out on 264 dried fully ossified adult human mandibles (528 Sides) which were segregated as 144 male (288 sides) and 120 female (240 sides) mandibles. The age of the bones used in the study was not predetermined.
Result: We observed three different shapes of coronoid process i.e. triangular, hook & rounded Shaped. The triangular shaped coronoid process was reported in 349 (66.10%) sides, the hook shaped was reported in 116 (21.97%) sides & the round shaped was reported only in 63 (11.93%) sides. So, triangular shaped coronoid process was most commonly reported in our study while round shaped was least commonly. The bilateral occurrences of all the three types were more common. The incidence of all the three types of shape were more common in male mandible as compared to female. The bilateral occurrences of all these three types were also more common in male mandibles as compared to female.
Conclusion: The detail knowledge about the different morphological shapes of the coronoid process of mandible is useful for the dental surgeons in oral & maxillofacial surgeries.
Key Words: Coronoid Process, Mandible, Maxillofacial Surgeries.
References
- Standring S, Collins P, Healy JC, Wigley C, Beale TJ. Mandible: Infratemporal and pterygopalatine fossae and temperomandibular joint. Grey’s Anatomy-The Anatomical Basis of Clinical Practice, Fortieth edition. Churchill Livingstone, Elsevier. 2008: 530-532.
- Shakya S, Ongole R, Nagraj SK. Morphology of Coronoid Process and Sigmoid Notch in Orthopantomograms in South Indian Population. World J Dent. 2013; 4:1-3.
- Prajapati VP, Ojaswini Malukar O, Nagar SK. Variations in the Morphological Appearance of the Coronoid Process of Human Mandible. Nat J Med Res. 2011; 1: 64-66.
- Kim YK, Hwang JW, Lee HJ, Yun PY. Use of Coronoid Process as a Donor Site for Sinus Augmentation : A Case Report. The Int J Oral Maxillofac Implants. 2009; 24:1149-1152.
- Isaac B. Holla S.J. Variations in the Shape of the Coronoid Process In the Adult Human Mandible. Journal Anat. Soc. India. 2001; 50(2): 137-139.
- Khan TA., Sharieff JH. Observation on Morphological Features of Human Mandibles in 200 South Indian Subjects. Anatomica Karnataka. 2011; 5(1): 44-49.
- Hossain SMA, Hossain SMM, Banna FAMH. Variation in the shape of the coronoid process in the adult human mandible. Bangladesh J Anat. 2011; 9 (2):75-78.
- Nirmale VK, Mane UW, Sukre SB, Diwan CV. Morphological Features of Human Mandible. Int J of Recent Trends in Sci Technol. 2012; 3 (2): 38-43.
- Vikas C Desai, Desai SD, Hussain N Aruna. Morphological study of mandible. Journal of pharmaceutical sciences and research. 2014;6(4):175-177.
- Mouna S, Bajpe R, Jagannatha SR, Jayanthi KS. A study of various forms of mandibular coronoid process in the determination of sex. Indian Journal of Clinical Anatomy & Physiology. 2015; 2(4):199-203.
- Sanmugam K. A study of morphological variation of lingula & coronoid process of adult human dry mandibles. J Pharm Sci & Res. 2015;7(11):1017-1020.
- Sheela D Kadam, Priya P Roy, Ambali MP, Doshi MA. Variation in the shape of coronoid process in dry mandible of maharashtra population. Int J Anat Res. 2015;3(1):895-898.
- Mintz S.M., Ettinger, A., Schmakel,T. and Gleason M. J. Contralateral coronoid process bone grafts for orbital floor reconstruction : an anatomic and clinical study. Journal of Oral Maxillofacial Surgery. 1998; 56 (10): 1140-1145.
- Clauser L., Curioni, C. and Spanio, S. The use of the temporalis muscle flap in facial and craniofacial reconstructive surgery. A review of 182 cases. Journal of Craniomaxillofacial Surgery. 1995; 23 (4): 203-214.
Corresponding Author
Md. Jawed Akhtar
Assistant Professor, Department of Anatomy
Indira Gandhi Institute of Medical Sciences, Patna, Bihar
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
DOI: https://dx.doi.org/10.18535/jmscr/v6i4.27
