Evaluation and Comparative Study of Palatal Rugae, Arch Length, and Arch Width with its Predictive Accuracy for Gender Identification
Materials and methods: 100 preorthodontic maxillary dental stone casts, including 50 males and 50 females in age range of 18â€“30 years, were studied for different rugae pattern, arch length, and arch width. Thomas and Kotze classification was adopted for assessing rugae pattern. The arch length was measured by using the Lavelle's method and arch width by measuring intermolar distance. The data were analyzed using independent t-test and discriminant function analysis by SPSS 19 Statistical Package.
Results: The study revealed that females had higher curved and diverging type of rugae while males had higher circular and converging type of rugae, which were found to be statistically significant (P < 0.05). The arch length and width at all dimensions were higher for males than females, which were found to be statistically significant (P < 0.05). Association between rugae pattern and arch dimension was computed using discriminant function analysis, which permitted gender differentiation in this population with an accuracy of 83%.
Conclusion: The rugae pattern, arch length, and arch width can be used for gender differentiation in the human population. However, further research work on a larger population and use of other methods is necessary to validate its use in forensics science.
Acharya AB, Sivapathasundharam B. Forensic odontology. In: Rajendran R, Sivapathasundharam B, eds. In: Shafer's Textbook of Oral Pathology 6th ed. Noida: Elsevier; 2009:871â€“899.
Caldas IM, Magalhales T, Afonso A. Establishing identity using cheiloscopy and palatoscopy. Forensic Sci Int. 2007;165:1â€“9.
Nayak P, Acharya AB, Padmini AT, Kaveri H. Differences in the palatal rugae shape in two populations of India. Arch Oral Biol. 2007;52:977â€“982.
Bharath ST, Kumar GR, Dhanapal R, Saraswathi T. Sex determination by discriminant function analysis of palatal rugae from a population of coastal Andhra. J Forensic Dent Sci. 2011;3:58â€“62.
Indira AP, Gupta M, David MP. Palatal rugae patterns for establishing individuality. J Forensic Dent Sci. 2012;4:2â€“5.
Saraf A, Bedia S, Indurkar A, Degwekar S, Bhowate R. Rugae patterns as an adjunct to sex differentiation in forensic identification. J Forensic Odontostomatol. 2011;29:14â€“19.
Shrestha RM, Bhattarai P. Dental arch length and arch symmetry analysis of Nepalese permanent dentition. J Nepal Dent Assoc. 2009;10:110â€“114.
Jindal R, Dua R, Bunger E. Sex determination using arch width in North Indian (Punjab) population. IDJSR. 2013;2:10â€“14.
Daniel J, Khatri M, Srinivasan SV, Jimsha VK, Marak F. Comparison of inter-canine and inter-molar width as an aid in gender determination: a preliminary study. J Indian Acad Forensic Med. 2014;36:168â€“172.
Chopra A, Rao NC, Gupta N, Vashisth S. Palatal rugae and arch length: a tool in gender determination. Univ Res J Dent. 2013;3:54â€“59.
Kallianpur S, Desai A, Kasetty S, Sudheendra U, Joshi P. An anthropometric analysis of facial height, arch length, and palatal rugae in the Indian and Nepalese population. J Forensic Dent Sci. 2011;3:33â€“37.
Thomas CJ, Kotze TJ. The palatal ruga pattern in six southern African human populations. Part I. A description of the populations and a method for its investigation. J Dent Assoc S Afr. 1983;38:547â€“553.
Lavelle CL, Foster TD, Flinn RM. Dental arches in various ethnic groups. Angle Orthod. 1971;41:293â€“299.
Ling JY, Wong RW. Dental arch widths of Southern Chinese. Angle Orthod. 2009;79:54â€“63.
Shanmugam S, Anuthama K, Shaikh H, et al. Palatal rugae in population differentiation between South and North Indians: a discriminant function analysis. J Forensic Dent Sci. 2012;4:75â€“79.
Ruengdit S, Riengrojpitak S, Tiensuwan M, Santiwong P. Sex determination from teeth size in Thais. In: The 6th CIFS Academic Day 2011. 2011.
Available from: http://www. forensic.sc.mahidol.ac.th/proceeding/52_Sittiporn.pdf [accessed 23.10.13].
Surekha R, Anila K, Reddy VS, Hunasgi S, Ravikumar S, Ramesh N. Assessment of palatal rugae patterns in Manipuri and Kerala population. J Forensic Dent Sci. 2012;4:93â€“96.
Kumar S, Vezhavendhan N, Shanthi V, Balaji N, Sumathi MK, Vendhan P. Palatal rugoscopy among Puducherry population. J Contemp Dent Pract. 2012;13:401â€“404.
Swetha S. Palatal rugae pattern in varied adult Indian population of males and females. J Pharm Sci Res. 2015;7:736â€“739.
Barrett MJ, Brown T, Macdonald MR. Size of dental arches in a tribe of Central Australian aborigines. J Dent Res. 1965;44:912â€“920.
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