Demirjian’s Eight Teeth Method for Dental age Estimation in Nepalese Population

Subedi, Nuwadatta; Parajuli, Umesh; Paudel, Ishwari Sharma; Mallik, Mukesh

doi:10.33314/jnhrc.v18i4.3119

Cited by 8 publications

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“…14 Referring to these concerns, Subedi et al has derived Nepalese population specific equation to estimate the dental age from Demirjian's 8-teeth method and that study has given acceptable results. 32 However, the method still needs to be tested in broader Nepalese population to draw the conclusion.…”

Section: Resultsmentioning

confidence: 99%

Estimation of Dental Age by Demirjian and Willems Method in a Tertiary Care Hospital of Nepal

et al. 2021

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Introduction: Dental age estimation using orthopantomogram is very useful in pediatric dentistry, orthodontics in clinical diagnosis and treatment planning and also has forensic application. Demirjian method is widely used for age estimation and Willems method has been suggested to be accurate than Demirjian in various populations. To estimate the dental age of children in a specific population of Nepal by Demirjian and Willems method, compare them with the chronological age and assess their applicability. Materials and Method: Digital orthopantomograms of 5 to 14 years of children were used to estimate the dental age by Demirjian’s 7- teeth method and Willems method. Descriptive statistics was used and mean with standard deviation was calculated for gender and age of the samples. Paired t-test was used for comparison of chronological age with dental age. P < 0.05 was considered as statistically significant.Pearson correlation was used to assess the correlation between chronological and dental age in both the genders. Result: By Demirjian method, there was an underestimation of 0.276 years in males and 0.194 in females and by Willems method, 0.652 in males and 0.847 in females which were statistically significant. There was an underestimation of dental age in all the age groups except in the age group of 5,7 and 14 for Demirjian age which was statistically nonsignificant. Pearson correlation demonstrated strong positive correlation between chronological age and dental age. Conclusion: The underestimation of dental age was more by Willems method as compared to Demirjian method. There was a strong positive relationship between chronological age and dental age in both the genders. Demirjian’s 7- teeth method was more applicable as compared to Willems method when tested in selected Nepalese children population

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Section: Resultsmentioning

confidence: 99%

Estimation of Dental Age by Demirjian and Willems Method in a Tertiary Care Hospital of Nepal

et al. 2021

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show abstract

Section: Resultsmentioning

confidence: 99%

Estimation of Dental Age by Demirjian and Willems Method In a Tertiary Care Hospital of Nepal

et al. 2021

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Introduction: Dental age estimation using orthopantomogram is very useful in pediatric dentistry, orthodontics inclinical diagnosis and treatment planning and also has forensic application. The objectives of this study were to estimate the dental age of children in a specific population of Nepal by Demirjian and Willems method, compare them with the chronological age and assess their applicability. Materials and Method: Digital orthopantomograms of 5 to 14 years of children were used to estimate the dental age by Demirjian’s 7- teeth method and Willems method. Descriptive statistics was used and mean with standard deviation was calculated for gender and age of the samples. Paired t-test was used for comparison of chronological age with dental age. P < 0.05 was considered as statistically significant. Pearson correlation was used to assess the correlation between chronological and dental age in both the genders. Result: By Demirjian method, there was an underestimation of 0.276 years in males and 0.194 in females and by Willems method, 0.652 in males and 0.847 in females which were statistically significant. There was an underestimation of dental age in all the age groups except in the age group of 5,7 and 14 for Demirjian age which was statistically nonsignificant. Pearson correlation demonstrated strong positive correlation between chronological age and dental age. Conclusion: The underestimation of dental age was more by Willems method as compared to Demirjian method. There was a strong positive relationship between chronological age and dental age in both the genders. Demirjian’s 7- teeth method was more applicable as compared to Willems method when tested in selected Nepalese children population

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“…Similarly, in a few studies done in selected Nepalese children population where Demirjian, Willems and Nollas methods have been used separately or in combined form have also found to underestimate the age. 14,[16][17][18][19] The application of the Demirjian, Willems and Nolla methods in the same design has been carried out only in four studies. 2,27,32,38 Maber et al, 32 Hegde S et al 38…”

Section: Resultsmentioning

confidence: 99%

“…15 The major bias in age estimation is the differences in growth and development as well as other factors like hereditary, sex, nutrition, function and environment in different ethnic groups of population which must be taken into significant consideration while applying age estimation methods. 12,15 In the Nepalese population, Demirjian method has been used independently 16,17 as well as with the Nolla method 14 or with Willems in numerous studies. 18,19 However, there have been no comparative studies between Demirjian, Nolla and Willems methods, thus this study aims to evaluate and compare the validity and accuracy of these methods in Nepalese children.…”

Section: Introductionmentioning

confidence: 99%

Dental age estimation and accuracy assessment by Demirjian, Nolla and Willems methods in Nepalese children for predicting the chronological age

et al. 2021

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Introduction: Dental age estimation has been performed by numerous methods worldwide. This study was done to evaluate and compare the validity and accuracy of dental age estimation by Demirjian, Nolla and Willems methods in Nepalese children. Materials and Method: A comparative cross sectional study was conducted on 280 orthopantomography of Nepalese children aged 5-14 years in Kantipur Dental College from December 2020 to September 2021. Dental age was calculated by three methods and difference with chronological age was examined. Descriptive statistics were presented as mean ± SD and median (range). Differences in paired data of chronological and dental ages were examined using Wilcoxon signed rank test. Spearman’s correlation coefficient was used for comparing chronological and dental ages. Regression analysis was performed to derive equation for predicting chronological age from dental age. Results: An underestimation of dental age was observed with Demirjian (-1.17 years), Nolla (-1.06 years) and Willems (-1.32 years) methods which was statistically significant and also across both genders (p<0.001). However, chronological age was found to be highly correlated with dental ages estimated using Demirjian (σ=0.930; p<0.001), Nolla (σ=0.939; p<0.001) and Willems (σ=0.947; p<0.001) methods. Linear regression analysis conducted to predict chronological age showed total variance of 80.8%, 87.7% and 89.5% in boys and 81.7%, 87.7% and 88.4% in girls by Demirjian, Nolla and Willems methods respectively. Conclusion: This study revealed Demirjian, Nolla and Willems methods can be a valid measure for age estimation among Nepalese children and precise prediction of chronological age can be made from different dental age estimation techniques.

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Demirjian’s Eight Teeth Method for Dental age Estimation in Nepalese Population

Cited by 8 publications

References 0 publications

Estimation of Dental Age by Demirjian and Willems Method in a Tertiary Care Hospital of Nepal

Estimation of Dental Age by Demirjian and Willems Method in a Tertiary Care Hospital of Nepal

Estimation of Dental Age by Demirjian and Willems Method In a Tertiary Care Hospital of Nepal

Dental age estimation and accuracy assessment by Demirjian, Nolla and Willems methods in Nepalese children for predicting the chronological age

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