Tuğçe Koçak1, Burçin Akan2. 1. Private practice, Izmir, Turkey. 2. Department of Orthodontics, Faculty of Dentistry, Izmir Katip Celebi University, 35640, Izmir, Turkey. burcin.yksel@gmail.com.
Abstract
PURPOSE: The aim of this study was to comparatively evaluate hand-wrist bones, cervical vertebrae and tooth development stages according to skeletal classification. METHODS: The orthodontic initial records of 297 patients were used and separated into three groups according to the skeletal malocclusion. Three groups including 99 people each were sampled representing malocclusions with Angle classes I, II and III, respectively. The panoramic, cephalometric and hand-wrist radiographs of all patients included in this study were used to compare dental and skeletal maturation indicators. Calcification of teeth was rated according to the system of Demirjian. To evaluate the stage of skeletal maturation hand-wrist radiographs were analyzed according to the Grave and Brown method. Also, Hassel and the Farman method was used to classifying vertebral developmental stages. Spearman rank correlation tests, as well as Fisher exact χ2 tests with r×c tables, were used for the comparison of categorical variables. RESULTS: Hand-wrist, vertebral and dental development stages showed a statistically significant relationship (p < 0.01) for both genders and in all malocclusions. The association between the different maturation indicators used in this study and the type of malocclusion was also statistically significant for both genders. It was observed that the peak period of skeletal maturation according to the hand-wrist radiograph findings correlated with the cervical vertebrae stage C3 in girls (63.2%) and C2-C3 in boys (43.5-43.5%). The weakest correlation was seen between the dental development stages and the skeletal developmental stages in the class II group (r = 0.443-0.220 [girls]; r = 0.604-0.410 [boys]). CONCLUSION: The use of the dental development stage as a reliable indicator of maturation was limited. According to the Demirjian method, the calcification stage of the second molar might indicate that the individual is in the pubertal peak period.
PURPOSE: The aim of this study was to comparatively evaluate hand-wrist bones, cervical vertebrae and tooth development stages according to skeletal classification. METHODS: The orthodontic initial records of 297 patients were used and separated into three groups according to the skeletal malocclusion. Three groups including 99 people each were sampled representing malocclusions with Angle classes I, II and III, respectively. The panoramic, cephalometric and hand-wrist radiographs of all patients included in this study were used to compare dental and skeletal maturation indicators. Calcification of teeth was rated according to the system of Demirjian. To evaluate the stage of skeletal maturation hand-wrist radiographs were analyzed according to the Grave and Brown method. Also, Hassel and the Farman method was used to classifying vertebral developmental stages. Spearman rank correlation tests, as well as Fisher exact χ2 tests with r×c tables, were used for the comparison of categorical variables. RESULTS: Hand-wrist, vertebral and dental development stages showed a statistically significant relationship (p < 0.01) for both genders and in all malocclusions. The association between the different maturation indicators used in this study and the type of malocclusion was also statistically significant for both genders. It was observed that the peak period of skeletal maturation according to the hand-wrist radiograph findings correlated with the cervical vertebrae stage C3 in girls (63.2%) and C2-C3 in boys (43.5-43.5%). The weakest correlation was seen between the dental development stages and the skeletal developmental stages in the class II group (r = 0.443-0.220 [girls]; r = 0.604-0.410 [boys]). CONCLUSION: The use of the dental development stage as a reliable indicator of maturation was limited. According to the Demirjian method, the calcification stage of the second molar might indicate that the individual is in the pubertal peak period.
Entities:
Keywords:
Age determination by skeleton; Cervical vertebra; Demirjian method; Hand-wrist x‑ray; Orthodontics treatment planning
Authors: Tiziano Baccetti; Lorenzo Franchi; Scott O Schulz; James A McNamara Journal: Am J Orthod Dentofacial Orthop Date: 2008-01 Impact factor: 2.650