scholarly journals Western Saudi adolescent age estimation utilising third molar development

2014 ◽  
Vol 08 (03) ◽  
pp. 296-301 ◽  
Author(s):  
Amin M. Alshihri ◽  
Estie Kruger ◽  
Marc Tennant
Keyword(s):  
Age Estimation ◽  
Developmental Stages ◽  
Tooth Development ◽  
Third Molar ◽  
Chronological Age ◽  
Stage Of Development ◽  
Large Populations ◽  
Males And Females ◽  
The Mean ◽  
Molar Morphology

ABSTRACT Objective: The aim of this study was to establish reference data on third molar morphology/development for age estimation in Western Saudi adolescents, between ages 14 and 23 years of old. Materials and Methods: The orthopantomograms of 130 individuals (males and females), were examined, and the stage of third molar development were evaluated. Results: Mean ages, standard deviations, and percentile distributions are presented for each stage of development. The mean estimated age for all participants (n = 130) was 219.7 months, and this differed significantly (P < 0.05) from the mean chronological age (226.5 months). Deviations of predicted age from real age showed 28.5% of all participants had their age estimated within 1 year (±12 months) of their chronological age. Most (43%) had their age underestimated by more than 12 months and the remaining 28.5% had their age overestimated by more than 12 months of their chronological age. Differences in left-right symmetry information of third molars were detected and were higher in the maxilla (92%) than in the mandible (82%). For all molars reaching stage “H” most individuals (males and females) were over the age 18 years of old. Males reach the developmental stages earlier than females. Conclusion: Third molar tooth development can be reliably used to generate mean age and the estimated age range for an individual of unknown chronological age. Further studies with large populations are needed for better statistical results.

scholarly journals Dental Age Assessment using Demirjian’s Eight Teeth Method and Willems Method in a Tertiary Hospital

2018 ◽  
Vol 56 (214) ◽  
pp. 912-916
Author(s):  
Nitin Kumar Agrawal ◽  
Lucina Hackman ◽  
Samarika Dahal
Keyword(s):  
Age Estimation ◽  
Tooth Development ◽  
Third Molar ◽  
Tertiary Hospital ◽  
Chronological Age ◽  
Criminal Prosecution ◽  
Dental Age ◽  
Dental Age Estimation ◽  
The Mean ◽  
Willems Method

Introduction: Age estimation is an important aspect in forensic anthropology, as it can aid in the identification of the deceased, and can be used in cases of immigration, child abuse and criminal prosecution in living individuals. Dental age estimation is considered reliable and accurate, since tooth development is least affected by environmental factors compared to somatic growth.Methods: In total, 150 pre-orthodontic treatment radiographs from healthy individuals were assessed. These individuals were aged between 8 to 19 years. Dental age for these individuals was calculated by two methods: Demirjian’s eight teeth method and Willems method. For Willems method, seven teeth on the left side of mandible (except the third molar) were staged according to Demirjian’s staging, and for Demirjian’s eight teeth method, all eight teeth were staged.Results: The mean chronological ages were 13.6961±1.94384 years in males and 13.9204±2.63541 years in females. The mean estimated ages by Demirjian’s eight teeth method were 12.1856±1.73478 years and 11.7906±2.32344 years in males and females respectively. Similarly, the mean estimated ages by Willems method were 12.8958±1.46838 years in males and 12.6926±2.27807 years in females.Conclusions: Willems method and Demirjian’s eight teeth method underestimated the chronological age in the given population. Both methods showed excellent correlation with chronological age indicating their applicability in dental age estimation, with development of population specific scores.

scholarly journals Using Dental Age to Estimate Chronological Age in Czech Children Aged 3–18 Years

2015 ◽  
Vol 116 (2) ◽  
pp. 139-154
Author(s):  
Kristina Ginzelová ◽  
Taťjana Dostálová ◽  
Hana Eliášová ◽  
Alex Vinšů ◽  
Antonín Buček ◽  
...  
Keyword(s):  
Age Estimation ◽  
Statistical Evaluation ◽  
Tooth Development ◽  
Chronological Age ◽  
Age Group ◽  
Dental Age ◽  
Dental Age Estimation ◽  
Mean Values ◽  
The Mean ◽  
Underlying Diseases

The Demirjian methods to determine dental age are based on analysis of orthopantograms. The dental age estimation is based on establishing the tooth development stages. The purpose of this study was to assess the accuracy of estimation of dental age by Demirjian in the use of all of his four methods. 505 Czech healthy boys and girls aged 3 to 18 years were examined radiographically at the Department of Stomatology, Second Faculty of Medicine, Charles University in Prague. It was mentioned the factors of underlying diseases influence the accuracy of the dental age estimation. For statistical evaluation, descriptive statistics was used to compare deviations of the mean values of chronological and dental age in each age group. The resulting difference between dental age and chronological age is not significant in both genders only when using both Demirjian 7-teeth methods of 1973 and 1976. Therefore these may be most appropriately used for forensic age estimation. There are shown standard deviation differences in different countries. Demirjian’s original 7-teeth method from 1973 and Demirjian’s revised 4-teeth method from 1976 appear to be the best methods for calculating the dental age of healthy Czech children of both genders.

scholarly journals Radiological age estimation using third molars mineralization in a sample attending orthodontic clinics (A retrospective study)

2020 ◽  
Vol 32 (1) ◽  
pp. 57-64
Author(s):  
Zainab M Kadhom
Keyword(s):  
Age Estimation ◽  
Developmental Stages ◽  
Third Molar ◽  
Practical Method ◽  
Chronological Age ◽  
Third Molars ◽  
Significant Difference ◽  
Mandibular Third Molars ◽  
The Right ◽  
Demirjian Method

Background: The evaluation of the chronological age is a practical method in crime investigation field that assists in identifying individuals to treat them as underage or adult. This study aimed to assess the stages of third molars mineralization in relation to chronological age of Iraqi individuals, determine the gender differences and arches (maxillary/mandibular) differences. Materials and Methods: A total of 300 orthopantomograms of orthodontic patients were collected according to specific criteria and evaluated visually. The developmental stages of maxillary and mandibular third molars were determined according to Demirjian method. The chronological age was recorded according to the particular mineralization stages at which it reached considering genders, sides and jaws. Comparisons were done using paired sample and independent sample t-tests. Results: Results showed that there was no statistically significant difference (P>0.05) between maxillary and mandibular third molars. The maxillary third molars reached earlier than mandibular one in stages F and G. There was no significant difference between the mean ages of males and females at each given developmental stage in the maxillary and mandibular third molars except for the stage D in the maxilla and stages D and E in the mandible. The development of third molar teeth on the right and left sides was similar except for the maxillary arch in males when there was a significant difference in stage C and D and stage E in the mandibular arch. Conclusion: The Demirjian method is an excellent approach for age assessment using Orthopantomogram. All of the differences between the current study and other studies could be because of the difference in the populations who were chosen from different geographical areas. Keywords: Age estimation, Demirjian method, third molar, Orthopantomogram, chronological age.

scholarly journals Orthopantomographic evaluation of third molar developmental stages in relation to chronological age of Bangladeshi female garment workers: A case report

2015 ◽  
Vol 5 (1) ◽  
pp. 22-25
Author(s):  
Shaikh Zakir Mahmud ◽  
Nahid Al Nomann ◽  
Md Arafat Kabir ◽  
Chowdhury Moin Jan
Keyword(s):  
Age Estimation ◽  
Developmental Stages ◽  
School Attendance ◽  
Third Molar ◽  
Forensic Odontology ◽  
Chronological Age ◽  
Mammal Species ◽  
Human Teeth ◽  
Research And Education ◽  
Qualitative Methodologies

Human teeth are among the most distinctive and long lasting features of mammal species. Various quantitative and qualitative methodologies have been developed by the researchers in order to establish an assessment format to determine the correlation between the dental age and the chronological age. The morphological and radiological examinations of third molars make up a part of the orthodontic, pedodontic, forensic odontology and oral surgical treatments and remain the most reliable biologic indicator available for age estimation during the middle teens and early twenties. This age calculation requirement is not only for differentiating the juvenile from the adult status in criminal law cases, but also for chronological age estimation in relation to school attendance, social benefits, employment and marriage. A case for actual need for age estimation using a developing third molar is presented here DOI: http://dx.doi.org/10.3329/bjdre.v5i1.22456 Bangladesh Journal of Dental Research and Education Vol.5(1) 2015: 22-25

scholarly journals Radiographic Employment of Mandibular Third-Molar Mineralisation to Estimate Chronological Age in a Population of Peshawar, Pakistan

2021 ◽  
Vol 30 (1) ◽  
pp. 39-44
Author(s):  
Quratulain Tariq ◽  
◽  
Mariam Ajmal Tareen ◽  
Iftikhar Uddin ◽  
Umar Hussain
Keyword(s):  
Quantile Regression ◽  
Age Determination ◽  
Third Molar ◽  
Forensic Odontology ◽  
Chronological Age ◽  
Strong Positive Correlation ◽  
Mandibular Third Molar ◽  
Quantile Regression Analysis ◽  
Males And Females ◽  
Mandibular Third Molars

OBJECTIVES: To determine the correlation between chronological age (CA) and mandibular third molar (MTM) development in a sample of Khyber Pakhtunkhwa (KP) population. Furthermore, to provide forensic reference data for age determination from MTM mineralisation. Finally, to derive regression formulae specific to this population to estimate age using MTM calcification stages. METHODOLOGY: Four hundred and seventy orthopantomographs (OPGs) of patients aged between 13-26 years from the Orthodontics department archive at the main tertiary dental hospital of KP were studied for development of MTM staging using Demirjian's method. Spearman's Correlation was applied to determine any relationship between CA and MTM development. An Independent two-sample t-test was performed to compare third-molar development in males and females. Population-specific models was developed using quantile regression analysis. RESULTS: A strong positive correlation was found between CA and MTM development (rs = 0.853; p- <0.001). The median quantile regression equation developed for entire sample is: Age = 8.8+ 1.4(developmental stage). Ninety-four percent of males and females at stage H were at least 18 years or older. CONCLUSION: Mandibular third-molars can be an appropriate guide for CA estimation in the KP population. Stage H is likely to occur at 18 years of age. This may be valuable for medicolegal suits requiring CA estimation. KEYWORDS: forensic odontology, forensic anthropology, panoramic radiographs, chronological age estimation, mandibular third-molar, Pakistan HOW TO CITE: Tariq Q, Tareen MA, Uddin I, Hussain U. Radiographic employment of mandibular third-molar mineralisation to estimate chronological age in a population of Peshawar, Pakistan. J Pak Dent Assoc 2021;30(1):39-44.

Accuracy of Demirjian and Willems Methods for Age Estimation of Children from Northern Argentina

2019 ◽  
Author(s):  
Hugo Norberto Aragón
Keyword(s):  
Age Estimation ◽  
Dental Treatment ◽  
Chronological Age ◽  
Dental Development ◽  
X Rays ◽  
Statistical Accuracy ◽  
Radiographic Images ◽  
The Mean ◽  
Radiological Studies ◽  
Paired T Test

The dental development is widely used to estimate the chronological age; one method frequently used is that of Demirjian, applied in Franc-Canadian children, and the other is that of Willems, adapted from the first one to Belgian children. Demirjian uses scores according to the degree of calcification of the seven permanent mandible teeth of the left side; Willems adapts to years the scale of scores of Demirjian. Objective: To analyze the accuracy in determining the chronological age through the degree of dental calcification using the methods of Demirjian and of Willems in children from Tucumán, Argentina. Methods: 66 children (29 female and 37 male) who assisted to radiological studies previous to the dental treatment were selected. Panoramic X-rays were taken. Dental ages were calculated using the corresponding tables of the methods of Demirjian and Willems. Chronological ages were calculated between the date of birth and the date of the study. The statistical paired t-test was used. Results: Through the method of Demirjian the mean of the differences was 0.44 ± 0.96 for girls and 0.49 ± 1.02 for boys, being significant differences between both genders. The method of Willems was more accurate than that one of Demirjian (-0.08 ± 0.92 for girls and 0.19 ± 0.94 for boys), being no significant differences between the dental and the chronological ages. Conclusion: According to these results both methods could be used to estimate the chronological age through the observed dental calcification in radiographic images of children from northern Argentina. Nevertheless, greater statistical accuracy with the method of Willems would be reached for both genders.

Sign in / Sign up

Export Citation Format

Share Document