Palatal rugae: An effective marker in population differentiation

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Published Apr 1, 2014
https://doi.org/10.4103/0975-1475.127771
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Volume 6, Issue 1, January-April 2014

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Rachna Rath
Department of Oral Pathology, Hi Tech Dental College and Hospital, Bhubaneswar, Odisha
B Reginald
Department of Oral Pathology, Narayana Dental College and Hospital, Nellore, Andhra Pradesh

Abstract

Background: The superiority of dentofacial structures as scientific identifiers, particularly in mass disasters is well known. Special techniques like rugoscopy are valuable not only in identification of skeletal remains but can also facilitate population differentiation, as few studies have shown. Aim: The present study is to classify and compare the differences in rugae shape in populations of Andhra Pradesh and Odisha and to evaluate the discriminatory ability of rugae shape in population differentiation. Materials and Methods: One hundred maxillary casts from each group, equally divided between the sexes and in a narrow age range, were classified as per rugae shapes. The incidence of rugae shape was recorded and their association with ethnicity was tested using Chi-square analysis and step wise discriminant function analysis. All analysis was undertaken using SPSS 16.0 (SPSS Inc., Chicago, Illinois, USA) and MS Excel Package. Results: Straight and nonspecific rugae were most prevalent in Andhra Pradesh, whereas the wavy forms and unifications prevailed in Odisha. A hitherto unknown nonspecific "plaque pattern" was detected in considerable numbers in Andhra Pradesh population. The accuracy of the discriminant function analysis in differentiating the study populations was 93.5%. Conclusion: Significant differences in rugae shape between the two populations emerged that also allowed a fair differentiation, thus validating previous reports of a good discriminatory ability of rugae shapes. Perhaps, more studies in genetically diverse populations as in India could also unearth new rugae patterns and further the identification process.

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How to Cite
Rachna Rath, & B Reginald. (2014). Palatal rugae: An effective marker in population differentiation. Journal of Forensic Dental Sciences, 6(1), 46–50. https://doi.org/10.4103/0975-1475.127771
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References

  1. Vij K. Textbook of forensic medicine and toxicology‑ principles and practice. 3rd ed. Missouri (USA): Elsevier Publications; 2005. p. 50‑104.
  2. Bernstein M. Forensic Odontology. In Eckert WG, editor. Introduction to Forensic Sciences. 2nd ed. Florida: CRC press LLC; 1997. p. 295‑342.
  3. Acharya AB, Sivapathasundaram B. “Forensic odontology”. In: “Shafer’s textbook of oral pathology”. Rajendran R, Sivapathasundaram B, editors. 5th ed. New Delhi (India): Elsevier Publications; 2007. p. 1199‑224.
  4. Nayak P, Acharya AB, Padmini AT, Kaveri H. Differences in the palatal rugae shape in two populations of India. Arch Oral Biol 2007;5:977‑82.
  5. Muthu Subramanian M, Limson KS, Julian R. Analysis of rugae in burn victims and davers to simulate rugae identification in cases of incineration and decomposition. J Forensic Odontostomatol 2005;23:26‑9.
  6. English WR, Robinson SF, Summitt JB, Oesterle LJ, BrannonRB, Morlang WM. Individuality of human palatal rugae. J Forensic Sci 1988;33:718‑26.
  7. Kapali S, Townsend G, Richards L, Parish T. Palatal rugae patterns in Australian Aborigines and Caucasians. Aust Dent J 1997;42:129‑33.
  8. Lysell L. Plicae palatinae transversae and papilla incisiva in man: A morphologic and genetic study. Acta Odontol Scand 1955;13:Suppl 18:5‑137. (As quoted by Kapali et al., 1997, vide ref no. 1)
  9. Thomas CJ. Incidence of primary rugae in Bushman juveniles. J Dent Res 1972;51:676.
  10. Thomas CJ, Kotze T. The palatal rugae pattern in six South African human populations. Part –I. A description of the populations and a method for its investigation. J Dent Assoc S Afr 1983;38:547‑53.
  11. Thomas CJ, Kotze TJ. The palatal rugae pattern in six South African human populations. Part –II. Inter racial differences. J Dent Assoc S Afr 1983;38:166‑72.
  12. Thomas CJ, Kotze TJ. The palatal rugae pattern in six South African human populations. Part –III. An evolutionary perspective. J Dent Assoc S Afr 1983;38:173‑6.
  13. Hauser G, Daponte A, Roberts MJ. Palatal rugae. J Anat 1989;165:237‑49.
  14. Shetty SK, Kalia S, Patil K, Mahima VG. Palatal rugae pattern in Mysorean and Tibetan populations. Indian J Dent Res 2005;16:51‑5.
  15. Thomas CJ, van Wyk CW. The palatal rugae in identification. J Forensic Odontostomatol 1988;6:21‑7.
  16. Hemnath M, Vidya M, Nandaprasad, Karkare BV. Human identification using palatal rugae: Manual method. Indian J Forensic Med Toxicol 2009;3:26‑8.