Yan-Jie Ding, Xiao Zhang, Wen-Li Shi, Zi-Yi Li, Wei Wang, Shi-Lin Zhang, Gen-Jie Yang, A-Ji Guo, Bo Jin
{"title":"基于右第一磨牙牙髓腔体积和牙髓指数的口腔颌面部CBCT估计汉族成人年龄。","authors":"Yan-Jie Ding, Xiao Zhang, Wen-Li Shi, Zi-Yi Li, Wei Wang, Shi-Lin Zhang, Gen-Jie Yang, A-Ji Guo, Bo Jin","doi":"10.12116/j.issn.1004-5619.2023.230705","DOIUrl":null,"url":null,"abstract":"<p><strong>Objectives: </strong>To explore the correlation between the actual age and the pulp chamber volume (PCV) and pulp dentinal index (PDI) of the right first molars based on cone beam computed tomography (CBCT) technology, and to construct an accurate and convenient model for age estimation.</p><p><strong>Methods: </strong>CBCT image data of 1 857 Han adults (883 males and 974 females) from the Department of Stomatology, Affiliated Hospital of North Sichuan Medical College were collected. The data were divided into training and validation sets at a ratio of 8∶2. A total of 1 485 training samples were used to construct the age estimation model, and 372 samples were used to validate the accuracy of the model. The Mimics 21.0 software was used to measure the PCV and calculate the PDI of the right first molars. Their correlations with age and the differences between different sexes and tooth positions were analyzed.</p><p><strong>Results: </strong>Both the PCV and the PDI of the first molars showed strong negative correlations with the actual age (<i>r</i> values ranged from 0.82 to 0.89). The differences in PCV and PDI between different sexes and tooth positions were statistically significant (<i>P</i><0.05). The age estimation model based on PDI was superior to that based on PCV. The model based on the PDI values of the two right first molars (<i>y</i>=73.72-44.15 <i>x</i><sub>3</sub>-28.27 <i>x</i><sub>4</sub>, where <i>x</i><sub>3</sub> and <i>x</i><sub>4</sub> are the PDI values of the right maxillary and mandibular first molars, respectively) was the best, with the <i>R</i><sup>2</sup> of 0.79 and the mean absolute error of 4.90 years.</p><p><strong>Conclusions: </strong>Both PCV and PDI of the first molars are effective indicators for age estimation. The age estimation model based on the PDI is more convenient and accurate than that based on the PCV, providing a more effective method for age estimation in forensic practice.</p>","PeriodicalId":12317,"journal":{"name":"法医学杂志","volume":"41 1","pages":"59-65"},"PeriodicalIF":0.0000,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Estimate the Age of Han Adult Based on the Pulp Chamber Volume and Pulp Dentinal Index of Right First Molars Using Oral and Maxillofacial CBCT.\",\"authors\":\"Yan-Jie Ding, Xiao Zhang, Wen-Li Shi, Zi-Yi Li, Wei Wang, Shi-Lin Zhang, Gen-Jie Yang, A-Ji Guo, Bo Jin\",\"doi\":\"10.12116/j.issn.1004-5619.2023.230705\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objectives: </strong>To explore the correlation between the actual age and the pulp chamber volume (PCV) and pulp dentinal index (PDI) of the right first molars based on cone beam computed tomography (CBCT) technology, and to construct an accurate and convenient model for age estimation.</p><p><strong>Methods: </strong>CBCT image data of 1 857 Han adults (883 males and 974 females) from the Department of Stomatology, Affiliated Hospital of North Sichuan Medical College were collected. The data were divided into training and validation sets at a ratio of 8∶2. A total of 1 485 training samples were used to construct the age estimation model, and 372 samples were used to validate the accuracy of the model. The Mimics 21.0 software was used to measure the PCV and calculate the PDI of the right first molars. Their correlations with age and the differences between different sexes and tooth positions were analyzed.</p><p><strong>Results: </strong>Both the PCV and the PDI of the first molars showed strong negative correlations with the actual age (<i>r</i> values ranged from 0.82 to 0.89). The differences in PCV and PDI between different sexes and tooth positions were statistically significant (<i>P</i><0.05). The age estimation model based on PDI was superior to that based on PCV. The model based on the PDI values of the two right first molars (<i>y</i>=73.72-44.15 <i>x</i><sub>3</sub>-28.27 <i>x</i><sub>4</sub>, where <i>x</i><sub>3</sub> and <i>x</i><sub>4</sub> are the PDI values of the right maxillary and mandibular first molars, respectively) was the best, with the <i>R</i><sup>2</sup> of 0.79 and the mean absolute error of 4.90 years.</p><p><strong>Conclusions: </strong>Both PCV and PDI of the first molars are effective indicators for age estimation. The age estimation model based on the PDI is more convenient and accurate than that based on the PCV, providing a more effective method for age estimation in forensic practice.</p>\",\"PeriodicalId\":12317,\"journal\":{\"name\":\"法医学杂志\",\"volume\":\"41 1\",\"pages\":\"59-65\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-02-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"法医学杂志\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.12116/j.issn.1004-5619.2023.230705\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Medicine\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"法医学杂志","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.12116/j.issn.1004-5619.2023.230705","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Medicine","Score":null,"Total":0}
Estimate the Age of Han Adult Based on the Pulp Chamber Volume and Pulp Dentinal Index of Right First Molars Using Oral and Maxillofacial CBCT.
Objectives: To explore the correlation between the actual age and the pulp chamber volume (PCV) and pulp dentinal index (PDI) of the right first molars based on cone beam computed tomography (CBCT) technology, and to construct an accurate and convenient model for age estimation.
Methods: CBCT image data of 1 857 Han adults (883 males and 974 females) from the Department of Stomatology, Affiliated Hospital of North Sichuan Medical College were collected. The data were divided into training and validation sets at a ratio of 8∶2. A total of 1 485 training samples were used to construct the age estimation model, and 372 samples were used to validate the accuracy of the model. The Mimics 21.0 software was used to measure the PCV and calculate the PDI of the right first molars. Their correlations with age and the differences between different sexes and tooth positions were analyzed.
Results: Both the PCV and the PDI of the first molars showed strong negative correlations with the actual age (r values ranged from 0.82 to 0.89). The differences in PCV and PDI between different sexes and tooth positions were statistically significant (P<0.05). The age estimation model based on PDI was superior to that based on PCV. The model based on the PDI values of the two right first molars (y=73.72-44.15 x3-28.27 x4, where x3 and x4 are the PDI values of the right maxillary and mandibular first molars, respectively) was the best, with the R2 of 0.79 and the mean absolute error of 4.90 years.
Conclusions: Both PCV and PDI of the first molars are effective indicators for age estimation. The age estimation model based on the PDI is more convenient and accurate than that based on the PCV, providing a more effective method for age estimation in forensic practice.
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