Department of Oral & Maxillofacial Pathology and Oral Microbiology, King George's Medical University, Lucknow, India.
J Forensic Leg Med. 2024 Oct;107:102755. doi: 10.1016/j.jflm.2024.102755. Epub 2024 Sep 14.
Forensic odontology involves the identification of individuals through dental records, making it a crucial tool in legal investigations. Non-metric dental traits (NMDT), which are variations in dental morphology play a key role as these traits are inherited characteristics that can help establish biological relationships or ancestry. Thus, we aim to assess the frequency and variability of NMDT in the human dentition of four ethnically mixed populations in Uttar Pradesh. This study can aid in the future by maintaining records of ethnic groups and their variability, which can be crucial for disaster victim management and forensic odontology.
The study was conducted on a total of 100 patients coming to the OPD of Oral Medicine and Oral Pathology and Microbiology of King George's Medical University from January 2022 to July 2023. Impressions of both arches were made for participants using irreversible hydrocolloid (alginate), and casts were examined under a stereomicroscope to assess 15 different morphological characteristics.
NMDTs such as winging, shoveling, double-shoveling interruption groove, canine mesial ridge, hypocone, metacone, carabelli's trait, peg-shaped incisors, peg-shaped molar, premolar lingual cusp variation, deflecting wrinkle, protostylid, metaconulid, entoconulid was evaluated. The NMDTS were evaluated in four different ethnics Nordics, Mediterranean, Oriental Mediterranean, and Protoaustraloid amongst which various traits showed a statistically significant variation among the population of Uttar Pradesh.
The sample studied presented confirmed supernumerary traits like metacone, protostylid, carabellis trait, metaconulid, premolar lingual cusp variation, and deflecting wrinkle were seen highest in Nordic, Mediterranean, Oriental Mediterranean, and Protoaustraloid ethnicity have a significant association with the Uttar Pradesh population.
法医牙科学涉及通过牙齿记录来识别个体，因此它是法律调查中的重要工具。非度量性牙齿特征（NMDT）是牙齿形态的变异，这些特征是遗传特征，可以帮助建立生物关系或祖先关系，因此起着关键作用。因此，我们旨在评估北方邦四个混合种族人群的人类牙齿中 NMDT 的频率和可变性。这项研究可以通过维护种族及其可变性的记录来帮助未来，这对于灾难受害者管理和法医牙科学至关重要。
本研究共纳入 2022 年 1 月至 2023 年 7 月期间到 King George's 医科大学口腔医学和口腔病理学与微生物学 OPD 就诊的 100 名患者。使用不可逆水胶体（藻酸盐）为参与者制作两个牙弓的印模，并用立体显微镜检查牙模以评估 15 种不同的形态特征。
评估了翼状、铲状、双铲状中断沟、犬齿近中嵴、下尖牙、后尖牙、卡氏尖牙特征、钉状切牙、钉状磨牙、前磨牙舌侧尖变异、偏斜皱襞、原尖牙、后尖牙、前尖牙等 NMDT。在所研究的人群中，各种特征在统计学上显示出显著的差异。在所研究的样本中，确认了额外的特征，如后尖牙、原尖牙、卡氏尖牙特征、后尖牙、前磨牙舌侧尖变异和偏斜皱襞，这些特征在北欧、地中海、东方地中海和原始澳洲种族中最为常见，与北方邦人口有显著关联。
