Prasad Mandava, Ganji Venkata Suresh Kumar, George Suja Ani, Talapaneni Ashok Kumar, Shetty Sharath Kumar
Department of Orthodontics and Dentofacial Orthopedics, Narayana Dental College and Hospital, Chinthareddypalem, Nellore, India.
J Nat Sci Biol Med. 2013 Jan;4(1):74-80. doi: 10.4103/0976-9668.107264.
Evaluation of skeletal maturity in human individuals is an important aspect in orthodontics and dentofacial orthopedics because, growth guidance and fundamental structural changes are essential for treatment of skeletal discrepancies in all the three planes. Among various growth assessment methods, cervical vertebra maturation stages and hand wrist have been correlated with the individual growth changes during puberty. The purpose of this study is to determine correlation of the CVM index with the modified median phalanx index (MP3) as described by Rajagopal and Kansal.
200 subjects (100 males and 100 females) of Nellore, Indian origin boys aged between 10 to 19 years and girls of 8 to 16 years were selected for the study. The subjects are selected randomly from patients visiting the Departments of Orthodontics and Dentofacial Orthopedics, Pediatric dentistry and Oral medicine and Radiology at Narayana Dental College and Hospital. Nellore. Radiographs of left hand MP3 and lateral cephalogram were taken.
Cohen's kappa statistic was used to assess the agreement between the two measurements based on categorical variables.
There was a good concordance between 6 stages of CVMI (Hassel and Farman) and the 6 stages of MP3 (Rajagopal and Kansal). Physiological maturity was earlier in females than in males when compared to the individuals of opposite sex of same chronological age. Chronological age was not a valid predictor of assessing the skeletal maturity because of significant variations in the distribution of CVMI and MP3 stages with respect to individual chronological age distribution.
评估人类个体的骨骼成熟度是正畸学和正颌外科的一个重要方面，因为生长引导和基本结构变化对于治疗所有三个平面的骨骼差异至关重要。在各种生长评估方法中，颈椎成熟阶段和手腕与青春期个体的生长变化相关。本研究的目的是确定CVM指数与Rajagopal和Kansal描述的改良中节指骨指数（MP3）之间的相关性。
选取200名受试者（100名男性和100名女性），他们是来自印度内洛尔的男孩，年龄在10至19岁之间，女孩年龄在8至16岁之间。这些受试者是从在纳拉亚纳牙科学院和医院正畸科、正颌外科、儿童牙科、口腔内科和放射科就诊的患者中随机选取的。拍摄左手MP3的X线片和头颅侧位片。
基于分类变量，使用Cohen's kappa统计量来评估两次测量之间的一致性。
CVMI（Hassel和Farman）的6个阶段与MP3（Rajagopal和Kansal）的6个阶段之间存在良好的一致性。与相同实足年龄的异性个体相比，女性的生理成熟比男性更早。由于CVMI和MP3阶段在个体实足年龄分布方面存在显著差异，实足年龄不是评估骨骼成熟度的有效预测指标。
