scholarly journals A Novel Ground Metric for Optimal Transport-Based Chronological Age Estimation

2021 ◽  
pp. 1-14
Author(s):  
Ali Akbari ◽  
Muhammad Awais ◽  
Soroush Fatemifar ◽  
Syed Safwan Khalid ◽  
Josef Kittler
Keyword(s):  
Age Estimation ◽  
Optimal Transport ◽  
Chronological Age

COMPARISION OF DENTAL SCORING SYSTEM WITH RADIOGRAPHIC SKELETAL SYSTEM IN AGE ESTIMATION

JKCD ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 9-11
Author(s):  
Sadaf Ambreen
Keyword(s):  
Age Estimation ◽  
Scoring System ◽  
Skeletal Age ◽  
Chronological Age ◽  
Age Group ◽  
Dental Age ◽  
Scoring Method ◽  
Cross Sectional ◽  
Study Results ◽  
Male Subjects

Objectives: To compare Demirjian Dental scoring method with Greulich-Pyle (GP) Skeletal method of age estimation in pubertal children. Materials and Methods: Sample of the study included 267 male healthy subjects of 11-16 years of age group.. Demirjian Scoring system was utilized to evaluate the orthopantomograms to assess their Dental age and the Hand-Wrist radiographs were analyzed to calculate the skeletal age by utilizing GP atlas. Chronological age was obtained from the date of birth of the subject .Both methods were compared with one another and with the chronological age. It was a cross-sectional study and only healthy male subjects without any clinical abnormalities were included in the study. Results: A total of 267 male subjects of 11-16 years of age group were assessed by Demirjian and Greulich Pyle Methods. Both were compared with Chronological Age. Data obtained was statistically analyzed and the Student “t” test was applied in the study population. The mean difference between Chronolgical age and dental age was 0.69years and that of chronological age and skeletal age was 0.87 years. It was observed from dental age assessment that it does not differ much from the skeletal age. Conclusion: It was concluded that Demirjian method of Age Estimation is more precise than Greulich Pyle method of Age Estimation. Furthermore both methods can be used selectively in Medicolegal cases to access bone age which can be easily correlated to chronological age.

scholarly journals Estimating Chronological Age by Dental Measurements on the Periapical Radiographs of an ‎Iranian Adult Population

2020 ◽  
Vol 10 (3) ◽  
pp. 32551
Author(s):  
Mitra Akhlaghi ◽  
Zahra Ghoncheh ◽  
Lida Hatami
Keyword(s):  
Root Length ◽  
Age Estimation ◽  
Adult Population ◽  
Chronological Age ◽  
Maxillary Canine ◽  
Regression Formula ◽  
Dental Measurements ◽  
Maximum Root ◽  
Tooth Length

Background: This study aimed to assess the accuracy of chronological age estimation based on dental measurements made on the Periapical (PA) radiographs of an Iranian adult population.   Methods: This study evaluated 90 parallel PA radiographs of sound maxillary canine teeth of 39 males and 51 females. Tooth length, root length, pulp length, pulp width, and root width at points A, B, and C according to Kvaal’s method were measured on PA radiographs using Scanora software. The collected data were analyzed using SPSS. Results: Maximum root width at point A provided the highest accuracy for gender estimation (77.7%). A significant correlation was noted between maximum pulp width at points B and C with age. Besides, a regression formula for age estimation was obtained. Conclusion: Maximum pulp width at points B and C could be used for age estimation in the adult population besides other parameters.

Accuracy of Estimating Chronological Age from Nolla's Method of Dental Age Estimation in a Population of Southern Saudi Arabian Children

2020 ◽  
Vol 23 (12) ◽  
pp. 1753
Author(s):  
SM Yassin ◽  
BA M AlAlmai ◽  
SH Ali Huaylah ◽  
MK Althobati ◽  
FM A AlHamdi ◽  
...  
Keyword(s):  
Age Estimation ◽  
Saudi Arabian ◽  
Chronological Age ◽  
Dental Age ◽  
Dental Age Estimation

scholarly journals Deep Neural Networks for Chronological Age Estimation From OPG Images

2020 ◽  
Vol 39 (7) ◽  
pp. 2374-2384 ◽  
Author(s):  
Nicolas Vila-Blanco ◽  
Maria J. Carreira ◽  
Paulina Varas-Quintana ◽  
Carlos Balsa-Castro ◽  
Inmaculada Tomas
Keyword(s):  
Neural Networks ◽  
Age Estimation ◽  
Deep Neural Networks ◽  
Chronological Age

scholarly journals Exploring Epigenetic Age in Response to Intensive Relaxing Training: A Pilot Study to Slow Down Biological Age

2019 ◽  
Vol 16 (17) ◽  
pp. 3074 ◽  
Author(s):  
Pavanello ◽  
Campisi ◽  
Tona ◽  
Lin ◽  
Iliceto
Keyword(s):  
Myocardial Infarction ◽  
Age Estimation ◽  
Healthy Subjects ◽  
Molecular Mechanisms ◽  
Biological Age ◽  
Chronological Age ◽  
Biological Aging ◽  
Epigenetic Clock ◽  
Age Related ◽  
Epigenetic Age

DNA methylation (DNAm) is an emerging estimator of biological aging, i.e., the often-defined “epigenetic clock”, with a unique accuracy for chronological age estimation (DNAmAge). In this pilot longitudinal study, we examine the hypothesis that intensive relaxing training of 60 days in patients after myocardial infarction and in healthy subjects may influence leucocyte DNAmAge by turning back the epigenetic clock. Moreover, we compare DNAmAge with another mechanism of biological age, leucocyte telomere length (LTL) and telomerase. DNAmAge is reduced after training in healthy subjects (p = 0.053), but not in patients. LTL is preserved after intervention in healthy subjects, while it continues to decrease in patients (p = 0.051). The conventional negative correlation between LTL and chronological age becomes positive after training in both patients (p < 0.01) and healthy subjects (p < 0.05). In our subjects, DNAmAge is not associated with LTL. Our findings would suggest that intensive relaxing practices influence different aging molecular mechanisms, i.e., DNAmAge and LTL, with a rejuvenating effect. Our study reveals that DNAmAge may represent an accurate tool to measure the effectiveness of lifestyle-based interventions in the prevention of age-related diseases.

scholarly journals Dental age estimation in brazilian older adults: report of two cases

2018 ◽  
Vol 32 (3) ◽  
pp. 151
Author(s):  
Mário Marques Fernandes ◽  
Alana De Cassia Silva Azevedo ◽  
Alexandre Raphael Deitos ◽  
Maria Gabriela Haye Biazevic ◽  
Rogério Nogueira Oliveira
Keyword(s):  
Older Adults ◽  
Age Estimation ◽  
Chronological Age ◽  
Case Description ◽  
Dental Age ◽  
Dental Age Estimation ◽  
The Public ◽  
Error Margin ◽  
Specific Formula

OBJECTIVE: report two cases of age estimation using the method developed by Kvaal et al. (1995).CASE DESCRIPTION: two males, apparently older and without identity documents, underwent age estimation tests by the Public Ministry in order to estimate chronological age. This method proposes a specific formula for dental elements present with error margin of 11.5 years. After this stage, new civil records were carried out, entitling the cases to some social benefits.CONCLUSION: age estimation in living individuals is a challenge but significantly important in the civil and penal spheres, and Kvaal’s technique may be used in Brazilian older adults.

scholarly journals Cervical Vertebral Maturation Method: Reproducibility and Efficiency of Chronological Age Estimation

2021 ◽  
Vol 11 (7) ◽  
pp. 3160
Author(s):  
Lydia Schoretsaniti ◽  
Anastasia Mitsea ◽  
Kety Karayianni ◽  
Iosif Sifakakis
Keyword(s):  
Age Estimation ◽  
High Reliability ◽  
Intraclass Correlation ◽  
Growth Spurt ◽  
Chronological Age ◽  
Maturation Stage ◽  
Rater Reliability ◽  
Absolute Agreement ◽  
Cervical Vertebral Maturation ◽  
Cervical Maturation

The aim of this study was to investigate the reproducibility of the Cervical Vertebral Maturation (CVM) method and the potential for chronological age estimation using this method. The sample consisted of 474 lateral cephalometric radiographs, from orthodontic patients aged 6.4–22.4 years. Six raters were trained to the CVM method (Baccetti). All images were assessed twice. Intra- and inter-rater agreements were assessed by Cohen’s weighted kappa and intraclass correlation coefficient, respectively. Analysis of variance was performed to investigate the correlation between cervical maturation stages and chronological age. The age prediction potential of the method was tested by general linear model regression analysis. Intra-rater reliability ranged from 0.857 to 0.931. Intra-rater absolute agreement ranged from 77% to 87% however inter-rater absolute agreement was lower than 50%. Inter-rater reliability was higher than 0.9. The 3rd Cervical Maturation Stage (CS3) showed the lowest reproducibility. The mean age differences among the 6 CS stages were statistically significant and increased as the CS increased. CS and gender could roughly explain the 60% (adjusted R2 = 0.61) of the age variance of the sample. This CVM method proved able to show high reliability; however, it cannot predict accurately the pubertal growth spurt. A direct correlation was found between cervical stages and chronological age. This method provides a broad estimation of chronological age.

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.

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