Harudin Mohd Hafizal, Franco Ademir, Jaffar Norhayati, Noor Mohamad Helmee Mohamad, Ibrahim Mohamad Azaini, Manica Scheila
Unit of Forensic Odontology, Department of Oral and Maxillofacial Surgery, Kuala Lumpur Hospital, Ministry of Health Malaysia, Kuala Lumpur, Malaysia.
Centre of Forensic and Legal Medicine and Dentistry, University of Dundee, Scotland, UK.
Egypt J Forensic Sci. 2023;13(1):18. doi: 10.1186/s41935-023-00339-0. Epub 2023 Mar 17.
Recent research has explored volumetric assessment in three-dimensional (3D) imaging procedures for sexual dimorphism. The 3D techniques have enabled a more realistic, accurate, and non-invasive visualization of sex-related anatomical parameters, such as the size and shape of human teeth.
To perform sexual dimorphism based on dental tissue volumes of permanent left maxillary and mandibular canines in a Malaysian population.
A cross-sectional study was carried out on 220 post-mortem computed tomography (PMCT) scans of Malaysian subjects (114 males and 106 females) aged between 18 and 40 years old. The permanent left maxillary and mandibular canines were analysed based on the volume of their (I) enamel cap, (II) coronal dentine, and (III) root, as well as the combination between the three dental tissue volumes (DTV). 3D Slicer version 4.10.2 computer software was used to perform a semi-automated segmentation of the anatomic regions of interest of each tooth.
The DTV of the permanent left maxillary and mandibular canines showed sexual dimorphism as the males presented larger DTV than females ( < 0.05). After binary logistic regression, the DTV revealed an overall sex classification rate of 60 to 74.1%. The DTV of the permanent left mandibular canine had more discriminant power to correctly classify males and females compared to the left maxillary canine.
The volumetric assessment of the dental tissues of the permanent left maxillary and mandibular canines could discriminate sex in the Malaysian population. Given the limited classification rate, this approach could act solely as a supplementary tool to existing sex estimation methods.
最近的研究探索了三维（3D）成像程序中用于性别二态性的体积评估。3D技术能够更真实、准确且非侵入性地可视化与性别相关的解剖参数，例如人类牙齿的大小和形状。
基于马来西亚人群中恒牙左上颌和下颌尖牙的牙组织体积进行性别二态性研究。
对220例年龄在18至40岁之间的马来西亚受试者（114名男性和106名女性）的尸体计算机断层扫描（PMCT）进行横断面研究。基于恒牙左上颌和下颌尖牙的（I）釉质帽、（II）冠部牙本质和（III）牙根的体积，以及这三种牙组织体积（DTV）之间的组合对其进行分析。使用3D Slicer 4.10.2版计算机软件对每颗牙齿的感兴趣解剖区域进行半自动分割。
恒牙左上颌和下颌尖牙的DTV显示出性别二态性，男性的DTV大于女性（<0.05）。二元逻辑回归后，DTV显示总体性别分类率为60%至74.1%。与左上尖牙相比，恒牙左下尖牙的DTV在正确区分男性和女性方面具有更大的判别力。
恒牙左上颌和下颌尖牙牙组织的体积评估能够在马来西亚人群中区分性别。鉴于分类率有限，这种方法只能作为现有性别估计方法的辅助工具。
