The Frequency of Occipital Spurs in Relation to the Cephalic Index: An Anatomorphometric Cone Beam CT Study.
Journal
Nigerian journal of clinical practice
ISSN: 1119-3077
Titre abrégé: Niger J Clin Pract
Pays: India
ID NLM: 101150032
Informations de publication
Date de publication:
01 May 2024
01 May 2024
Historique:
received:
12
01
2024
accepted:
12
03
2024
medline:
6
6
2024
pubmed:
6
6
2024
entrez:
6
6
2024
Statut:
ppublish
Résumé
The occipital spur (OS) can be described as an abnormal elongation of the external occipital protuberance (EOP). The cephalic index (CI) refers to the ratio of width to length in any skull. The aim of the present study was to evaluate the frequency and types of OS. It also aimed to determine the mean CI and the distribution of skull types using cone beam computed tomography (CBCT). And to determine if there was a relationship between the cephalic index and the presence and types of OS. CBCT scans from 523 patients were included in the study. OSs were classified as type 1 (flat), type 2 (crest), and type 3 (spine). Skull length and width were measured on axial sections and the CI was calculated. Based on the cephalic index (CI), skull types were classified as dolichocephalic (CI < 75), mesocephalic (75 < CI < 80), brachycephalic (80 < CI < 85), and hyperbrachycephalic (CI > 85). The most common cranial types in the study group were brachycephalic (44.7%), mesocephalic (28.3%), hyperbrachycephalic (21.2%), and dolichocephalic (5.7%). Regarding the presence of OS, 54.3% of the participants had no OS, 23.1% had flat type, 15.3% had crest type, and 7.2% had spin type OS. There was a statistically significant difference (P < 0.05) in the frequency of OS according to skull type. This study, the first to evaluate CI and OS using CBCT, concludes that brachycephaly is the most common cranial type. OS is more common in mesocephalic and dolichocephalic skulls, at older ages, and in males.
Sections du résumé
BACKGROUND
BACKGROUND
The occipital spur (OS) can be described as an abnormal elongation of the external occipital protuberance (EOP). The cephalic index (CI) refers to the ratio of width to length in any skull.
AIM
OBJECTIVE
The aim of the present study was to evaluate the frequency and types of OS. It also aimed to determine the mean CI and the distribution of skull types using cone beam computed tomography (CBCT). And to determine if there was a relationship between the cephalic index and the presence and types of OS.
METHODS
METHODS
CBCT scans from 523 patients were included in the study. OSs were classified as type 1 (flat), type 2 (crest), and type 3 (spine). Skull length and width were measured on axial sections and the CI was calculated. Based on the cephalic index (CI), skull types were classified as dolichocephalic (CI < 75), mesocephalic (75 < CI < 80), brachycephalic (80 < CI < 85), and hyperbrachycephalic (CI > 85).
RESULTS
RESULTS
The most common cranial types in the study group were brachycephalic (44.7%), mesocephalic (28.3%), hyperbrachycephalic (21.2%), and dolichocephalic (5.7%). Regarding the presence of OS, 54.3% of the participants had no OS, 23.1% had flat type, 15.3% had crest type, and 7.2% had spin type OS. There was a statistically significant difference (P < 0.05) in the frequency of OS according to skull type.
CONCLUSION
CONCLUSIONS
This study, the first to evaluate CI and OS using CBCT, concludes that brachycephaly is the most common cranial type. OS is more common in mesocephalic and dolichocephalic skulls, at older ages, and in males.
Identifiants
pubmed: 38842715
doi: 10.4103/njcp.njcp_45_24
pii: 01253091-202405000-00014
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
647-653Informations de copyright
Copyright © 2024 Copyright: © 2024 Nigerian Journal of Clinical Practice.
Références
Srivastava M, Asghar A, Srivastava NN, Gupta N, Jain A, Verma J. An Anatomic morphological study of occipital spurs in human skulls. J Craniofac Surg 2018;29:217–9.
Varghese E, Samson RS, Kumbargere SN, Pothen M. Occipital spur: Understanding a normal yet symptomatic variant from orthodontic diagnostic lateral cephalogram. BMJ Case Rep 2017;2017:bcr2017220506.
Shahar D, Evans J, Sayers MGL. Large enthesophytes in teenage skulls: Mechanical, inflammatory and genetic considerations. Clin Biomech (Bristol, Avon) 2018;53:60–4.
Shahar D, Sayers MG. A morphological adaptation? The prevalence of enlarged external occipital protuberance in young adults. J Anat 2016;229:286–91.
Gunacar DN, Gonca M, Kose TE. Occipital spurs on lateral cephalometric radiographs: Morphologic and morphometric features. Oral Radiol 2022;38:416–21.
Singh R. Bony tubercle at external occipital protuberance and prominent ridges. J Craniofac Surg 2012;23:1873–4.
Khanduri S, Malik S, Khan N, Patel YD, Khan A, Chawla H, et al. Establishment of cephalic index using cranial parameters by computed tomography in a sampled North Indian population. Cureus 2021;13:e15421.
Scarfe WC, Farman AG. What is cone-beam CT and how does it work? Dent Clin North Am 2008;52:707–30.
White SC. Cone-beam imaging in dentistry. Health Phys 2008;95:628–37.
Khatun S. Cephalic Index in Indigenous Tharu Community. JNMA 2018;56:825–9.
Farkas LG, Posnick JC, Hreczko TM. Anthropometric growth study of the head. Cleft Palate Craniofac J 1992;29:303–8.
Maina MB, Shapu YC, Garba SH, Muhammad MA, Garba AM, Yaro AU, et al. Assessment of cranial capacity in a North-Eastern adult Nigerian population. J Appl Sci 2011;11:2662–5.
Muralidhar NV, Ranjan A, Jayashankar Rao JS, Sreeshyla HS, Nitin P. Cephalic index, facial index and dental parameters: A correlative study to evaluate their significance in facial reconstruction. J Oral Maxillofac Pathol 2021;25:537–42.
Yagain VK, Pai SR, Kalthur SG, Chethan P, Hemalatha I. Study of cephalic index in Indian students. Int J Morphol 2012;30:125–9.
Ludwigs L, Pape C, Visse HS, Runte C, Meyer U, Dirksen D. Cross sectional analysis of Eurasian skull anatomy for 3D cephalometry-normative data reveal four different skull types. J Pers Med 2023;13:1018.
Koizumi T, Komuro Y, Hashizume K, Yanai A. Cephalic index of Japanese children with normal brain development. J Craniofac Surg 2010;21:1434–7.
Ekizoglu O, Hocaoglu E, Inci E, Can IO, Solmaz D, Aksoy S, et al. Assessment of sex in a modern Turkish population using cranial anthropometric parameters. Leg Med (Tokyo) 2016;21:45–52.
Zhang Y, Schepartz LA. Three-dimensional geometric morphometric studies of modern human occipital variation. PLoS One 2021;16:e0245445.
Gülekon IN, Turgut HB. The external occipital protuberance: Can it be used as a criterion in the determination of sex? J Forensic Sci 2003;48:513–6.