Comparative study of palatal rugae pattern in class II div 1 and class I individuals

Abstract

Aims:To determine if the palatal rugae have a characteristic pattern in untreated class II div 1 malocclusions compared to normal class I occlusions, and to provide a valuable insight whether palatal rugae can be taken up as additional criteria for classifying malocclusions.Materials and Methods:The study was conducted on initial maxillary dental casts of 24 individuals with untreated class II div 1 malocclusion with an overjet of minimum of 5mm, of whom 12 were females and 12 were males, with age ranging from 16 to 24 years and compared with Class I patients casts.Results:There was no statistically significant difference in the mean intermolar widths of the two groups. The first, second and third palatal rugae were shorter in class II div 1 patients than in class I patients which was statistically significant. All the patients with Angle's class I occlusion had good pattern of palatal rugae falling in the score range of 1–3, whereas 22% of the patients with class II div 1 had poor pattern of palatal rugae, with score 4 and 2 patients exhibiting a score of 4 and 5, respectively, but this was not statistically significant.Conclusion:There was a significant constriction of the palatal rugae in class II div 1 individuals as compared to class I individuals, though they were matched for the same intermolar widths. There was a distinct pattern of palatal rugae between the two groups.

Rugoscopy: A Diagnostic Appurtenance for Malocclusion or just a Forensic Aid? - A Pilot Study

“…Nevertheless, to attain a conclusive evidence of this particular outcome, a larger sample size of Class II div2 has to be studied and compared to normal occlusion patients having similar palatal widths. The age group of 12-26 years was selected based on the evidence that orientation pattern gets established at birth finally attaining a final feature during adolescence and thereafter any change that occurs may be in length but not in shape [7,8]. Thus the shape of PR once ascertained, could be investigated for any correlations with ethnicity or malocclusions.…”

“…Ample evidence in literature supports stability in shape of PR, although increase in size of anterior part of the palate in early years of life may bring about change in length of PR [7,8]. Gender differentiation is also noticed in some longitudinal studies for increase in length of PR from 5 to 10 years of age, notably 11%for boys and 9% for girls [5,9].…”

<p> Perbedaan pola rugae palatina sebelum dan sesudah perawatan dengan alat ortodonti lepasan</p><p>Differences in palatal rugae patterns before and after the removable orthodontic appliances treatment</p>

“…Hal tersebut sesuai dengan penelitian sebelumnya yang menyatakan bahwa ukuran rugae palatina pada maloklusi kelas 1 didominasi oleh rugae primer. 23 Penelitian sebelumnya tersebut membandingkan pola rugae palatina pada maloklusi kelas II divisi 1 dengan maloklusi kelas I menunjukkan bahwa rugae palatina pada maloklusi kelas II divisi 1 lebih pendek dibandingkan pada maloklusi kelas I. 23 Hasil tersebut juga berbanding lurus dengan penelitian lain yang dilakukan pada 50 subjek penelitian menunjukkan rugae primer lebih dominan dibandingkan dengan rugae lainnya.…”

“…23 Penelitian sebelumnya tersebut membandingkan pola rugae palatina pada maloklusi kelas II divisi 1 dengan maloklusi kelas I menunjukkan bahwa rugae palatina pada maloklusi kelas II divisi 1 lebih pendek dibandingkan pada maloklusi kelas I. 23 Hasil tersebut juga berbanding lurus dengan penelitian lain yang dilakukan pada 50 subjek penelitian menunjukkan rugae primer lebih dominan dibandingkan dengan rugae lainnya. 24 Penelitian lain yang dilakukan juga menghasilkan jumlah rugae primer yang sering muncul (56%) pada populasi Aborigin Australia.…”

“…19 Seseorang dengan palatum yang luas memiliki ukuran rugae palatina yang lebih panjang. 23 Penelitian ini memberikan hasil bahwa H0 diterima berarti tidak terdapat perbedaan pola rugae palatina sebelum dan sesudah perawatan dengan alat ortodonti lepasan sehingga hasil penelitian ini dapat digunakan sebagai salah satu sarana untuk tujuan identifikasi individu. Ini sesuai dengan penelitian sebelumnya yang menyatakan bahwa rugae palatina dapat digunakan untuk mengidentifikasi individu.…”