Longitudinal Skeletal Changes in a Turkish Anatolian Population


  • Nihal Hamamcı
  • Seher Gündüz Arslan
  • Semra Şahin

Turk J Orthod 2009;22(3):198-209

The goal of this study was to detect the growth changes in the maxilla and mandible of Turkish Anatolian subjects by using frequently analyzed measurements in orthodontic diagnosis. 30 subjects (15 males and 15 females) with Angle class I occlusal relationship, and normal anteroposterior (ANB, 2–4 degrees) and vertical (SN-GoGn, 32±5 degrees) skeletal relationships selected from the university archive were included in this study. Lateral cephalometric radiographs of subjects taken at T1 (mean age 8.8 years), T2 (mean age 13.8 years) and T3 (mean age 17.8 year) periods were investigated with gender difference and also research was carried out without gender difference at the same time periods. A total of fifteen measurements were analyzed longitudinally. As a result of our study, all values except ANB angle in girls and except Y-axis angle in boys showed statistically significant changes. Between boys and girls, significant differences were found in Y-axis angle in the period of T1; in Y-axis angle, ANS-PNS, ANSPNS-P measurements in the period of T2, and in ANB angle, ANSPNS, ANSPNS-P, Co-A and Co-Gn measurements in the period of T3. Similar results were found in other measurements except these between boys and girls. In conclusion, boys and girls showed similar findings in angular measurements, but only Y-axis angle was statistically greater in girls than in boys in the periods of T1 and T2. This showed an early vertical mandibular growth in girls than in boys. In linear measurements, boys generally showed greater results than girls.

Keywords: Longitudinal, Growth, Turkish Anatolian