Malik Shaima, Skrobola Mike, Obamiyi Samuel, Feng Changyong, Wang Zhihui, Rossouw P Emile, Michelogiannakis Dimitrios
Department of Orthodontics and Dentofacial Orthopedics, Eastman Institute for Oral Health, University of Rochester, New York, USA.
Orthodontist in Private Practice, Middletown, New York, USA.
J Orthod Sci. 2020 Aug 18;9:11. doi: 10.4103/jos.JOS_2_20. eCollection 2020.
To compare dental and skeletal ages among African American (AA), Caucasian (C) and Hispanic (H) subjects (chronological ages 9 to 15-years).
A total of 168 subjects (9 to 15 years old) were equally divided into AA, C, and H groups, with an equal number of males and females. Each group was divided equally into 7 chronological age-groups, ranging from 9 to 15 years. Dental age was determined from panoramic radiographs as primary, early mixed, late mixed, or permanent dentition (scored as 1-4). Skeletal age was calculated from hand-wrist radiographs using Fishman's Skeletal Maturation Index (SMI 1-11). One-way analysis of variance and Tukey's test were used to compare skeletal and dental ages among AA, C and H subjects; and AA, C and H subjects in each chronological age-group. The two-sample t-test was used to compare SMI and dental age among females and males.
Skeletal and dental age were not significantly different between AA, C and H subjects. Mean SMI was higher in females than males; and there were no significant gender differences regarding dental age. Mean SMI and dental age were significantly different among AA, C and H subjects in the 12-year-old and 11-year-old age groups, respectively.
Dental and skeletal maturation are fairly similar among AA, C and H subjects (aged 9 to 15 years).
比较非裔美国人（AA）、白种人（C）和西班牙裔（H）受试者（实际年龄9至15岁）的牙齿年龄和骨骼年龄。
总共168名受试者（9至15岁）被平均分为AA、C和H组，男女数量相等。每组又被平均分为7个实际年龄组，范围从9岁到15岁。根据全景X线片确定牙齿年龄，分为乳牙期、早混合牙期、晚混合牙期或恒牙期（评分1 - 4）。使用菲什曼骨骼成熟指数（SMI 1 - 11）从手腕X线片计算骨骼年龄。采用单因素方差分析和图基检验比较AA、C和H受试者之间以及每个实际年龄组中的AA、C和H受试者的骨骼和牙齿年龄。使用两样本t检验比较女性和男性之间的SMI和牙齿年龄。
AA、C和H受试者之间的骨骼和牙齿年龄无显著差异。女性的平均SMI高于男性；牙齿年龄方面无显著性别差异。在12岁和11岁年龄组中，AA、C和H受试者的平均SMI和牙齿年龄分别存在显著差异。
AA、C和H受试者（9至15岁）的牙齿和骨骼成熟度相当相似。
