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Singh DS, Chokkalingam DTS, Pillai DJP, Basavaraj Urs DA. Does third molar impaction affect age estimation in adolescent and young adults? A radiographic population based study. Med Leg J 2022; 90:156-160. [PMID: 35624541 DOI: 10.1177/00258172221077725] [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] [Indexed: 06/15/2023]
Abstract
Few studies consider the effects of impaction, resulting in inaccurate estimation of age using third molar. We aimed to assess the significance of impaction in estimating age using Modified Demirjian's method. 200 orthopantomograms of patients between 16-25 years were collected comprising 171 tests and 212 controls. Chronologic age (CA) and estimated age (EA) were calculated. Independent sample t-test, chi-square test, paired t-test and Kolmogrov-Smirnov test of normality were used. The mean difference between the CA and EA in both the tests and control samples were significant (mean difference test group = 2.6 ± 2.07, control group = 2.0 ± 1.8; p = 0.01). It provided a difference of 0.6 which is equal to 7.2 months. The results of our study indicate that impacted mandibular third molars are susceptible to undergo slower mineralization, leading to erroneous lower age estimation. These results in an Indian population are noteworthy. However further studies are needed.
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Affiliation(s)
- Dr Shivani Singh
- Department of Radiation Oncology, Maulana Azad Medical College, New Delhi, India
| | | | | | - Dr Aadithya Basavaraj Urs
- Department of Oral Pathology and Microbiology, Maulana Azad Institute of Dental Sciences, New Delhi, India
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Gopalaiah H, Gurram A, Chaitanya NCSK, Sharma S, Gattu A, Rathore K, Ali SH, Parvathala P, Reesu GV, Mula AP, Balla SB. Is there any difference in the development of mandibular third molars according to the type of impaction: An orthopantomographic study in south Indian children and adolescents. Leg Med (Tokyo) 2022; 57:102055. [DOI: 10.1016/j.legalmed.2022.102055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 02/07/2022] [Accepted: 03/13/2022] [Indexed: 11/24/2022]
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Fallstricke in der forensischen Altersdiagnostik zur Frage nach dem 18. Altersjahr. Rechtsmedizin (Berl) 2020. [DOI: 10.1007/s00194-020-00427-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Age assessment in the living using modified Gustafson's criteria in a northern Chinese population. Int J Legal Med 2019; 133:921-930. [PMID: 30790037 DOI: 10.1007/s00414-019-02024-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Accepted: 02/11/2019] [Indexed: 12/26/2022]
Abstract
Regressive dental changes appear to be suitable for age assessment in living adults. In 2012, Olze et al. showed that several criteria presented by Gustafson for extracted teeth can also be applied to orthopantomograms. The objective of this study was to test the applicability and reliability of this method in a Chinese population. For this purpose, 1300 orthopantomograms of 650 female and 650 male Chinese aged between 15 and 40 years were evaluated. The characteristics of secondary dentin formation, periodontal recession, attrition, and cementum apposition were reviewed in all the mandibular premolars. The sample was split into a training and test dataset. Based on the training set, the correlation of the individual characteristics with chronological age was studied with a stepwise multiple regression analysis, in which individual characteristics formed the independent variable. According to the results, the R values amounted to 0.80 to 0.83; the standard error of estimate was 4.29 to 4.75 years. By analyzing the test dataset, the accuracy of the present study, Olze's and Timme's formulas were determined by the difference between the estimated dental age (DA) and chronological age (CA). Taking both mean differences and mean absolute differences into account, the Chinese age estimation formula did not always perform better compared with Olze's and Timme's formulas for both males and females. It was concluded that this method can be used in Chinese individuals for age assessment. However, the applicability of the method is limited by the quality of the X-ray images, and the method should only be applied by experienced forensic odontologists.
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De Tobel J, Phlypo I, Fieuws S, Politis C, Verstraete KL, Thevissen PW. Forensic age estimation based on development of third molars: a staging technique for magnetic resonance imaging. THE JOURNAL OF FORENSIC ODONTO-STOMATOLOGY 2017; 35:117-140. [PMID: 29384743 PMCID: PMC6100221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND The development of third molars can be evaluated with medical imaging to estimate age in subadults. The appearance of third molars on magnetic resonance imaging (MRI) differs greatly from that on radiographs. Therefore a specific staging technique is necessary to classify third molar development on MRI and to apply it for age estimation. AIM To develop a specific staging technique to register third molar development on MRI and to evaluate its performance for age estimation in subadults. MATERIALS AND METHODS Using 3T MRI in three planes, all third molars were evaluated in 309 healthy Caucasian participants from 14 to 26 years old. According to the appearance of the developing third molars on MRI, descriptive criteria and schematic representations were established to define a specific staging technique. Two observers, with different levels of experience, staged all third molars independently with the developed technique. Intra- and inter-observer agreement were calculated. The data were imported in a Bayesian model for age estimation as described by Fieuws et al. (2016). This approach adequately handles correlation between age indicators and missing age indicators. It was used to calculate a point estimate and a prediction interval of the estimated age. Observed age minus predicted age was calculated, reflecting the error of the estimate. RESULTS One-hundred and sixty-six third molars were agenetic. Five percent (51/1096) of upper third molars and 7% (70/1044) of lower third molars were not assessable. Kappa for inter-observer agreement ranged from 0.76 to 0.80. For intra-observer agreement kappa ranged from 0.80 to 0.89. However, two stage differences between observers or between staging sessions occurred in up to 2.2% (20/899) of assessments, probably due to a learning effect. Using the Bayesian model for age estimation, a mean absolute error of 2.0 years in females and 1.7 years in males was obtained. Root mean squared error equalled 2.38 years and 2.06 years respectively. The performance to discern minors from adults was better for males than for females, with specificities of 96% and 73% respectively. CONCLUSION Age estimations based on the proposed staging method for third molars on MRI showed comparable reproducibility and performance as the established methods based on radiographs.
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Affiliation(s)
- Jannick De Tobel
- Department of Radiology and Nuclear Medicine, Ghent University, Belgium
- Department of Oral Health Sciences – Forensic Dentistry, KU Leuven and Department of Dentistry – University Hospitals Leuven, Belgium
- Department of Oral and Maxillofacial Surgery, Leuven University Hospital, Belgium
- Department of Head, Neck and Maxillofacial Surgery, Ghent University Hospital, Belgium
| | - Inès Phlypo
- Department of Dentistry – Special Care in Dentistry, PaeCoMeDiS, Ghent University, Ghent, Belgium
| | - Steffen Fieuws
- Leuven Biostatistics and Statistical Bioinformatics Centre (L-BioStat), Leuven, Belgium
| | - Constantinus Politis
- Department of Oral and Maxillofacial Surgery, Leuven University Hospital, Belgium
| | | | - Patrick W. Thevissen
- Department of Oral Health Sciences – Forensic Dentistry, KU Leuven and Department of Dentistry – University Hospitals Leuven, Belgium
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Scharte P, Vieth V, Schulz R, Ramsthaler F, Püschel K, Bajanowski T, Pfeiffer H, Schmeling A, Schmidt S, Wittschieber D. Comparison of imaging planes during CT-based evaluation of clavicular ossification: a multi-center study. Int J Legal Med 2017; 131:1391-1397. [PMID: 28608146 DOI: 10.1007/s00414-017-1615-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/23/2017] [Indexed: 11/26/2022]
Abstract
Determining the ossification stage of the medial clavicular epiphysis by computed tomography represents the currently recommended methodology for the question of whether a living individual has completed the 18th or 21st year of life. In the present study, thin-slice CT scans of 1078 sternoclavicular joints were reconstructed in axial and coronal image series and evaluated according to the two classification systems established for age diagnostics using the clavicle. Both image series (axial and coronal) were analyzed separately. When comparing the results of axial and coronal view, a different ossification stage was found in 35.6% of the clavicles. The results suggest an influence of the imaging plane on the process of stage determination. In order to further approximate the three-dimensional and asymmetrical structure of the epiphyseal ossification center, the usage of at least two different reformation types may be recommended. In practice, only those reference studies should be applied which exactly employed the same number and orientations of the reformation types that are going to be used in the respective routine case.
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Affiliation(s)
- Philipp Scharte
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Volker Vieth
- Institute of Clinical Radiology, University Hospital Münster, Münster, Germany
- Clinic of Radiology, Ibbenbüren Hospital, Ibbenbüren, Germany
| | - Ronald Schulz
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Frank Ramsthaler
- Institute of Legal Medicine, University of the Saarland, Homburg, Saar, Germany
- Institute of Legal Medicine, University Hospital Frankfurt/Main, Frankfurt/Main, Germany
| | - Klaus Püschel
- Institute of Legal Medicine, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Bajanowski
- Institute of Legal Medicine, University Hospital Essen, Essen, Germany
| | - Heidi Pfeiffer
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Andreas Schmeling
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Sven Schmidt
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
- Institute of Legal Medicine, Charité University Hospital, Berlin, Germany
| | - Daniel Wittschieber
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany.
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Wittschieber D, Schulz R, Pfeiffer H, Schmeling A, Schmidt S. Systematic procedure for identifying the five main ossification stages of the medial clavicular epiphysis using computed tomography: a practical proposal for forensic age diagnostics. Int J Legal Med 2016; 131:217-224. [PMID: 27658782 DOI: 10.1007/s00414-016-1444-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/23/2016] [Indexed: 11/24/2022]
Abstract
In forensic age estimations of living individuals, computed tomography of the clavicle is widely used for determining the age of majority. To this end, the degree of ossification of the medial clavicular epiphysis can be determined by means of two classification systems complementing each other: a 5-stage system and an additional 6-stage system that further sub-classifies the stages 2 and 3. In recent years, practical experience and new data revealed that difficulties and even wrong stage determinations may occur especially when following the short descriptions of the fundamental 5-stage system only. Based on current literature, this article provides a systematic procedure for identifying the five main ossification stages by listing important preconditions and presenting an algorithm that is comprised of four specific questions. Each question is accompanied by comprehensive and detailed descriptions which specify the criteria used for differentiation. The information is subdivided into "single-slice view" and "multi-slice view." In addition, illustrative case examples and schematic drawings facilitate application of the procedure in forensic practice. The pitfalls associated with the criteria of stage determination will be discussed in detail. Eventually, two general rules will be inferred to assign correct ossification stages of the medial clavicular epiphysis by means of computed tomography.
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Affiliation(s)
- Daniel Wittschieber
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany.
| | - Ronald Schulz
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Heidi Pfeiffer
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Andreas Schmeling
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Sven Schmidt
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
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Forensic age diagnostics using projection radiography of the clavicle: a prospective multi-center validation study. Int J Legal Med 2015; 130:213-9. [DOI: 10.1007/s00414-015-1285-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 10/21/2015] [Indexed: 10/22/2022]
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Standardized medical age assessment of refugees with questionable minority claim-a summary of 591 case studies. Int J Legal Med 2014; 129:595-602. [PMID: 25410091 DOI: 10.1007/s00414-014-1122-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 11/11/2014] [Indexed: 10/24/2022]
Abstract
In order to establish identity of asylum seekers, part of which is age clarification, administrative authorities are obliged to investigate the credibility of allegations based on the usual means of evidence to determine the applicable legal background. In case of serious doubts concerning age minority declaration, medical expert opinion builds the key proof bound by a complex framework consisting of EU regulations, domestic legal backgrounds and the scientific 'state of the art,' the latter being largely influenced by the pursuit of the German 'Study Group on Forensic Age Diagnostics.' Our application example demonstrates the exceptional value of its guidelines serving evidence-based understanding of the age issue in borderline adults within the asylum context. The results deriving from a substantial number of cases disclose an unequivocal inclination of age-disputed male refugees towards concluding somatic development despite a tendency of low lying age reports.
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Subclassification of clavicular substage 3a is useful for diagnosing the age of 17 years. Rechtsmedizin (Berl) 2014. [DOI: 10.1007/s00194-014-0990-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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The influence of impaction to the third molar mineralization in northwestern Chinese population. Int J Legal Med 2014; 128:659-65. [PMID: 24532176 DOI: 10.1007/s00414-014-0979-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 02/04/2014] [Indexed: 10/25/2022]
Abstract
Age estimation by third molar mineralization has been developed for a period of time. Recent studies showed that impaction status has an influence on the rate of the third molar mineralization in Europids and male Black African populations. In this regard, the present study was conducted to determine whether the impaction status could delay the chronological process of third molar mineralization in northwestern Chinese population too. A total of 3,512 digital orthopantomograms of 1,255 male and 2,257 female northwestern Chinese subjects aged from 11 to 26 years were assessed based on the formation stages described by Demirjian et al. with two modifications. Mineralization stage and impaction status were determined for all third molars. Statistical measures were calculated at stages C-H in the male and female gender for both impacted and non-impacted third molars. It was ascertained that the mean ages with impacted third molars at stages C-H were 0.02-1.42 years higher in males and 0.04-1.52 years higher in females than those with non-impacted third molars, but statistical differences were only found at stages C, D, and E in males and stages D and E in females. The probabilities of being under 14, 16, or 18 years of age with non-impacted third molars were all higher than those with impacted third molars. The results prove that impacted third molars show significant slower mineralization than non-impacted ones at stages D and E in both males and females of northwestern Chinese population. It is recommended to consider the influence of impaction on the rate of third molar mineralization for dental age estimation.
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Lopez TT, Arruda CP, Rocha M, Rosin ASADO, Michel-Crosato E, Biazevic MGH. Estimating ages by third molars: Stages of development in Brazilian young adults. J Forensic Leg Med 2013; 20:412-8. [DOI: 10.1016/j.jflm.2012.12.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 11/08/2012] [Accepted: 12/26/2012] [Indexed: 10/27/2022]
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Olze A, van Niekerk P, Schulz R, Ribbecke S, Schmeling A. The influence of impaction on the rate of third molar mineralisation in male black Africans. Int J Legal Med 2012; 126:869-74. [PMID: 22885908 DOI: 10.1007/s00414-012-0753-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/31/2012] [Indexed: 11/28/2022]
Abstract
One of the main criteria used in dental age diagnostics in living adolescents and young adults is assessment of the mineralisation stage of the third molars. In the case of Europid populations, it has been established that impaction status has an influence on the rate of mineralisation of the third molars. In view of this, a study was undertaken to determine whether the chronological process of wisdom tooth mineralisation is dependent upon impaction status in black Africans too. Orthopantomograms (553) of 437 male and 116 female black South Africans with verified birth dates in the age group between 10 and 26 years were studied. Mineralisation stage and impaction status were determined for all third molars. Statistical measures were calculated for the mandibular wisdom teeth at stages F, G and H and for the maxillary wisdom teeth at stage H in the male gender for both impacted and non-impacted third molars. It was ascertained that the minimum age in persons with impacted third molars, depending on the wisdom tooth observed, was 0.19-2.57 years higher than in those with non-impacted wisdom teeth. Test persons with impacted mandibular wisdom teeth at stage F or G were on average between 0.32 and 1.88 years older than those with non-impacted mandibular wisdom teeth. The 50 % probability values of impacted wisdom teeth at stage H were 1.85-3.31 years higher than those in non-impacted wisdom teeth. The conclusion was drawn that in male black Africans, impacted mandibular wisdom teeth mineralise more slowly than non-impacted lower third molars. The presence of impacted mandibular wisdom teeth in mineralisation stage H in male black Africans does not, however, furnish proof of completion of the 18(th) year of life beyond reasonable doubt.
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Affiliation(s)
- Andreas Olze
- Institut für Rechtsmedizin, Charité-Universitätsmedizin Berlin, 10559, Berlin, Germany
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Olze A, Hertel J, Schulz R, Wierer T, Schmeling A. Radiographic evaluation of Gustafson's criteria for the purpose of forensic age diagnostics. Int J Legal Med 2012; 126:615-21. [PMID: 22580780 DOI: 10.1007/s00414-012-0701-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Accepted: 04/23/2012] [Indexed: 11/30/2022]
Abstract
The main criteria used in dental age estimation in living young individuals are mineralisation and eruption of the third molars. In order to further diversify the spectrum of characteristics after completion of third molar development, tests were undertaken to determine whether the characteristics studied by Gustafson can be ascertained with the required forensic certainty with the aid of the orthopantomogram and whether the evaluation of these could render forensic odontological age diagnoses possible beyond the 18th year of life. For this purpose, 1,299 conventionally produced orthopantomograms of 650 female and 649 male Germans aged from 15 to 40 years were studied. The characteristics of secondary dentin formation, cementum apposition, periodontal recession and attrition were evaluated in all the mandibular premolars. The correlation of the individual characteristics with chronological age was studied with the aid of a multiple regression analysis in which chronological age formed the dependent variable. Depending on the tooth studied, the R values amounted to 0.65 to 0.73; the standard error of estimate was 5.3 to 5.7 years. Basically, the regression equations calculated can be recommended for age estimation in living individuals, although it should be borne in mind that the applicability of the new method presented is limited by the quality of the X-ray images.
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Affiliation(s)
- Andreas Olze
- Institut für Rechtsmedizin, Charité-Universitätsmedizin Berlin, 10559, Berlin, Germany
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Olze A, Hertel J, Schulz R, Schmeling A. Zementapposition als Kriterium der zahnärztlichen Altersschätzung. Rechtsmedizin (Berl) 2012. [DOI: 10.1007/s00194-012-0807-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Forensische Altersdiagnostik bei lebenden Jugendlichen und jungen Erwachsenen. Rechtsmedizin (Berl) 2011. [DOI: 10.1007/s00194-011-0741-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rudolf E. Volljährigkeitsbeurteilung in österreichischen Asylverfahren von 1997 bis 2010. Rechtsmedizin (Berl) 2010. [DOI: 10.1007/s00194-010-0707-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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