Correlation between dental calcification stages and skeletal maturity indicators
Introduction: Skeletal maturity timing and its assessment is paramount for orthodontic diagnosis and treatment planning. Many forms are treatment and best suited at circus-pubertal age and methods to ascertain that have been in practice for years. Hence this study is aimed at comparing mandibular second molar calcification stages with skeletal maturity as indicator through six cervical vertebral maturational (CVM) stages and eight stages of Demirjian’s method.
Material and Methods: Lateral cephalograms and panoramic radiographs of 150 patients were included in this study. The tooth development of mandibular second molar was assessed on panoramic radiographs according to eight- grade scale of Demirjian’s system. Cervical vertebrae (C2, C3 and C4) outlines traced from the lateral cephalometric radiographs were visually analysed using the CVM method in order to determine the skeletal maturation stage.
To study any direct relationship between the cervical stages and eight stages of Demirjian’s method, percentage distribution of dental development stages in the subsequent cervical stages was calculated, taking gender into account. Spearman’s rank correlation test was used to see the level of correlation between cervical vertebral maturation and dental calcification stages.
Results: The CVM stage was consistently earlier in females. Dental calcification stages were more advanced in CVM stage 2 and 3 for males and dental calcification stage D corresponded to CVM stage 1 and 2 (pre-peak of pubertal spurt). The CVM stage 3(peak of growth spurt) corresponded to stage E of dental calcification in females and stage G in males. Similarly, dental calcification stage G corresponded to CVM stage 4 (growth spurt peak) and stage H with CVM stage 5 and 6 i.e. end of pubertal spurt.Conclusions: The dental calcification stages of mandibular second molar may be considered as primary diagnostic tool to determine skeletal maturity on routine orthopantogram radiograph.