Jayaraman Jayakumar, Mendez Maria Jose Cervantes, Gakunga Peter Thiuri, Roberts Graham
Department of Pediatric Dentistry, Virginia Commonwealth University, 520 North 12th Street, Richmond, VA 23298, USA.
Department of Developmental Dentistry, University of Texas Health San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA.
Leg Med (Tokyo). 2022 May;56:102033. doi: 10.1016/j.legalmed.2022.102033. Epub 2022 Feb 2.
Dental tissues follow a systematic pattern of development and several radiological methods have been developed and validated. This study aims to develop and validate a reference data set (RDS) for dental development of Hispanic children and to compare the mean age using the Demirjian and Moorrees tooth developmental stage (TDS) systems. A total of 600 Dental Panoramic Tomographs (DPTs) of Hispanic children aged 6 to 17 years were obtained and reference datasets (RDS) were developed by scoring all the maxillary and mandibular teeth in the left side of the arch according to the Demirjian (8 stage) and Moorrees (14 stage) scoring systems. To validate the RDS, 120 (DPTs) separate from the RDS were randomly selected, and dental ages were calculated from the RDS using unweighted and five weighted mean average methods. Statistical significance was set at p < 0.05, and a paired t-test was conducted to compare the difference between Chronological Age (CA) and Dental Age (DA) for each weighting method. For the 8-stage system, the mean (sd, se) difference between CA and DA for the unweighted method was 0.04 (0.51, 0.065) years for males, and 0.07 (0.41, 0.053) years for females. The difference was not statistically significant for all five weighting methods (p > 0.05). For the 14-stage system, CA-DA for the unweighted method was 0.17 (0.33, 0.042) years for males, and 0.13 (0.41, 0.053) years for females. The difference was statistically significant for most of the Moorrees methods (p < 0.05). Dental age derived from the unweighted average method using the reference dataset derived from Demirjian's 8-stage system is recommended for dental age estimation in Hispanic children and adolescents.
牙齿组织遵循系统的发育模式，并且已经开发并验证了多种放射学方法。本研究旨在为西班牙裔儿童的牙齿发育建立并验证一个参考数据集（RDS），并使用德米尔坚（Demirjian）和穆里斯（Moorrees）牙齿发育阶段（TDS）系统比较平均年龄。共获取了600例6至17岁西班牙裔儿童的口腔全景断层扫描（DPT）图像，并根据德米尔坚（8阶段）和穆里斯（14阶段）评分系统对牙弓左侧所有上颌和下颌牙齿进行评分，从而建立参考数据集（RDS）。为了验证RDS，从RDS中随机选择120例（DPT），并使用未加权和五种加权平均方法从RDS中计算出牙龄。设定统计学显著性水平为p < 0.05，并进行配对t检验以比较每种加权方法下实际年龄（CA）和牙龄（DA）之间的差异。对于8阶段系统，未加权方法下男性CA和DA的平均（标准差，标准误）差异为0.04（0.51，0.065）岁，女性为0.07（0.41，0.053）岁。所有五种加权方法的差异均无统计学显著性（p > 0.05）。对于14阶段系统，未加权方法下男性的CA - DA为0.17（0.33，0.042）岁，女性为0.13（0.41，0.053）岁。大多数穆里斯方法的差异具有统计学显著性（p < 0.05）。建议使用源自德米尔坚8阶段系统的参考数据集通过未加权平均方法得出的牙龄来估计西班牙裔儿童和青少年的牙龄。
