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Meghana RV, Mallempalli P, Kondakamalli S, Boringi M, Vaddeswarapu RM, Kairamkonda CR, Gurram A, Balla SB, Angelakopoulos N. A test to study the influence of impaction on mandibular third molar development and forensic age estimation in a sample of south Indian children and young adults. Leg Med (Tokyo) 2021; 54:101998. [PMID: 34896837 DOI: 10.1016/j.legalmed.2021.101998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 10/10/2021] [Accepted: 11/26/2021] [Indexed: 11/26/2022]
Abstract
It has been argued that the impaction of the third molars could result in delayed maturation, which, in turn, could affect age estimations in criminal proceedings. In view of this, the present study was undertaken to determine whether the impaction status could delay the chronological process of third molar mineralization in a sample of south Indian children and young adults. The orthopantomograms (OPGs) of 915 children and young adults of south Indian origin aged between 15 and 22 years were evaluated. Mineralisation stage and impaction status were determined for all lower third molars. Descriptive statistics were performed at stages D to H of Demirjian staging system. The results of independent t-test show that the impaction resulted in statistically significant slower mineralization in impacted lower third molars at stages D to F in both sexes. It was ascertained that the mean ages with the impacted lower third molars at stage G were 0.98-1.38 years higher in males and 0.50-0.80 years higher in females than those with non-impacted lower third molars. For stage H, the mean ages were 0.14-0.21 years higher in males and 0.25-0.44 years higher in females. The probabilities of being 18 years and above is higher for non-impacted lower third molars at stages G and H than those with impacted ones. It is concluded that the impaction could result in delayed maturation in the lower third molars of the studied sample. Further studies are warranted in a more diverse sample.
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Affiliation(s)
| | | | | | - Mamatha Boringi
- Department of Oral Medicine and Radiology, Panineeya Mahavidyalaya Institute of Dental Sciences, India.
| | | | - Charan Raj Kairamkonda
- Department of Oral Medicine and Radiology, Panineeya Mahavidyalaya Institute of Dental Sciences, India.
| | | | - Sudheer B Balla
- Department of Forensic Odontology, Panineeya Mahavidyalaya Institute of Dental Sciences, Hyderabad, Telangana.
| | - Nikolaos Angelakopoulos
- Department of Orthodontics and Dentofacial Orthopaedics, University of Bern, Bern, Switzerland.
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Shen S, Guo Y, Wang M, Wang J, Fan L, Ji F, Tao J. A quick method of determining the age of 8 years old: Based on the first premolars on Eastern Chinese population. Leg Med (Tokyo) 2021; 53:101950. [PMID: 34332259 DOI: 10.1016/j.legalmed.2021.101950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 07/01/2021] [Accepted: 07/20/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND Whether an individual is over 8 years old is of great significance in clinical medicine and law. The Demirjian, Willems and Cameriere methods are one of the most widely used methods of dental age estimation, but neither method was suitable in Eastern China. And all of them are time-consuming for clinical work. A new and time-saving method for judging whether an individual is 8 years old is yet to be proposed on Eastern Chinese population. AIM The paper proposes a method for judging whether an individual is 8 years old based on the relationship between age and the first premolar maturity index (I1PM), which is related to the measurement of the open apices of the first premolar. SUBJECTS & METHODS It is a retrospective study where orthopantomograms of 748 children (356 female and 392male) aged 5-13 years were collected and analyzed. Linear regression was used to infer the value of I1PM for eastern China. Furthermore, this method was compared to those based on Demirjian's stages F. RESULTS AND CONCLUSIONS A cutoff value of I1PM = 0.35 was taken. The sensitivity of this test was 90.0% and specificity was 93.3%. Furthermore, the proportion of individuals with a correct classification was 90.9%. The results of the test showed that Demirjian's stage F performance was lightly better than I1pm < 0.35. However, the sensitivity, specificity, and overall accuracy of both are greater than or equal to 90.0%, and the differences are not very significant.
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Affiliation(s)
- Shihui Shen
- Department of General Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, China
| | - Yibo Guo
- Department of General Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, China
| | - Miaochen Wang
- Department of General Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, China
| | - Jian Wang
- Department of General Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, China
| | - Linfeng Fan
- Department of Radiology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, China
| | - Fang Ji
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, China.
| | - Jiang Tao
- Department of General Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, China.
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Akkaya N, Yilanci HÖ. Assessment of third molar maturity index for legal age threshold of 18 in a sample of Turkish individuals. AUST J FORENSIC SCI 2020. [DOI: 10.1080/00450618.2020.1729412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Nursel Akkaya
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - H. Özge Yilanci
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, İzmir Democracy University, İzmir, Turkey
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