Abstract
Palatal rugae patterns are anatomic structures considered unique to each person. Monozygotic twins present similarities, however, Rugoscopy in particular, may contribute to their individualization for forensic purposes. The aims of this study were: to study the palatal rugae classifications of Briñón; to propose improvements to facilitate use of this method, if pertinent; and to characterize palatal rugae in a sample of Brazilian monozygotic twins and singletons. Precise reproducibility of the two methods of Briñón, from 1982 and 2011, was prevented by poor intra-examiner agreement (70% and 13% respectively). Our proposed improvements to these methods, although preliminary, were associated with better results. The most common palatal rugae patterns were types A, M, and Q. Palatal rugae were confirmed to be unique to each individual, even in monozygotic twins. Furthermore, twins did not exhibit any special patterns that might facilitate their differentiation from singletons.
Highlights
IntroductionThe palatal ridges – their shape, position, number, and orientation – are unique to each individual.[6,7] classification of palatal rugae still represents a challenge because of the wide range of different methodologies available and, lack of standardization, as well as the subjective nature of interpreting these characteristics.[8]
Palatal rugae are structures located on the palate and are formed in the third month of intrauterine life.[1,2,3]
When comparing readouts with the reference patterns (RP), 46% were in disagreement
Summary
The palatal ridges – their shape, position, number, and orientation – are unique to each individual.[6,7] classification of palatal rugae still represents a challenge because of the wide range of different methodologies available and, lack of standardization, as well as the subjective nature of interpreting these characteristics.[8]. With the purpose of improving recording and interpretation of palatal rugae, Briñón[9,10] proposed a classification in 1982 (later updated in 2011) similar to the fingerprint system. No studies testing or using either of these classifications have been published in the literature; their practical application remains unclear
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