Age estimation using pulp/enamel volume ratio of impacted mandibular third molars measured on CBCT images in a northern Chinese population
| Autor: | Shao-Qing Li, Pan-Fen Xing, Chun-Xia Yan, Jing-Si Yang, Zhi-Yong Zhang, Qiao-Mei Min, Yu-cheng Guo, Lan-Jiang Li, Wen-Fan Jin, Jun Li |
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| Rok vydání: | 2018 |
| Předmět: |
Molar
Adult Male Accuracy and precision China Mandible Pathology and Forensic Medicine Young Adult stomatognathic system Humans Dental Enamel Dental Pulp Mathematics Aged Orthodontics Chinese population Enamel paint GrowCut algorithm Tooth Impacted Image segmentation Cone-Beam Computed Tomography Middle Aged Surface-area-to-volume ratio Age estimation visual_art visual_art.visual_art_medium Female Molar Third Age Determination by Teeth Forensic Dentistry |
| Zdroj: | International journal of legal medicine. 133(6) |
| ISSN: | 1437-1596 |
| Popis: | The present study aims to evaluate the relation between chronological age and the ratio of pulp volume (PV) to enamel volume (EV) of impacted mandibular third molars (IMTMs) by using cone-beam computed tomography (CBCT) images and an improved 3D image segmentation technique. A sample of CBCT images of IMTM was collected from 414 northern Chinese subjects (214 male and 200 female clinical patients) ranging in age from 20 to 65 years. The GrowCut effect image segmentation (GCEIS) module algorithm was used to calculate the PV and EV from CBCT images. The total sample was divided into a training group and validation group in a ratio of 7 to 3. The PV/EV ratio (PEr) in the training sample was used to develop a mathematical formula for age estimation as follows: age = − 5.817–21.726 × Ln PEr (p |
| Databáze: | OpenAIRE |
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