scholarly journals Correlation of dental and chronological maturity in girls and boys aged 7 to 14 years

2005 ◽  
Vol 52 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Zorana Nikolic ◽  
Ivana Scepan ◽  
Evgenija Markovic
Keyword(s):  
Statistical Data ◽  
Age Groups ◽  
Mean Value ◽  
Chronological Age ◽  
Correlation Ratio ◽  
Dental Age ◽  
Mean Values ◽  
Demirjian’S Method ◽  
Dental Maturity ◽  
Correlation Level

The aim of the study was to assess correlation level of dental and chronological maturity related to gender in a group of children of our population. Material and method: Total number of 320 girls and boys, 7 to 14 years old, participated in the study. Dental age assessed by Demirjian's method. Statistical data were analyzed by mean value and SD for dental maturity in age groups of 7, 8, 9, 10, 11, 12, 13 and 14 years for girls and boys, respectively. Calculating the equation of linear regression and the determination and correlation ratio assessed correlation level of dental and chronological age. Results and conclusion: According to the results obtained, it can be concluded that mean values of dental age are coinciding with the chronological maturity in all 8 age groups which is confirmed by high interdependence of dental and chronological maturity (78.6% for boys and 79.6% for girls). .

scholarly journals Evaluation of Dental Maturity Using the Demirjian’s Method in Romanian Children

2021 ◽  
Vol 26 (2) ◽  
pp. 48-51
Author(s):  
Eugen Silviu Bud ◽  
Anamaria Bud ◽  
Cristina Bică ◽  
Oana Elena Stoica ◽  
Adelia-Elena Oltean ◽  
...  
Keyword(s):  
Age Groups ◽  
Chronological Age ◽  
X Rays ◽  
Dental Age ◽  
The Difference ◽  
Demirjian’S Method ◽  
Larger Sample ◽  
Dental Maturity ◽  
Age Category

Abstract Demirjian’s method is the most frequently used method of dental maturity estimation. The aim of this study was to assess the accuracy of the method in a sample of Romanian children. The study was conducted on X-rays of 126 children with ages ranging from 5 to 15 years old. Dental age was determined and t-tests were used to assess the difference between dental age and chronological age within each age category. The boys in our study have advanced dental age in all age groups, while the girls have only in the age categories 7 to 8 years, 9 to 10 years and 11 to 12 years. The results of our study show that the method is appropriate for Romanian children and that these standards are applicable only in certain age groups. Further research is required on a larger sample.

Dental Age Assessment of 8.5 to 17 Year-old Saudi Children Using Demirjian's Method

2008 ◽  
Vol 9 (3) ◽  
pp. 64-71 ◽  
Author(s):  
Suiaiman Al-Emran
Keyword(s):  
Age Groups ◽  
Chronological Age ◽  
Age Group ◽  
Dental Age ◽  
French Canadian ◽  
Age Assessment ◽  
Standard Values ◽  
Mandibular Teeth ◽  
Demirjian’S Method ◽  
Demirjian Method

Abstract Aim The aim of this study was to assess the dental age in Saudi children aged 8.5 to 17 years using the Demirjian method. Methods and Materials Four hundred ninety panoramic radiographs of boys and girls were reviewed retrospectively. All children were placed in the age group closest to their chronological age. The dental age was scored on all seven left mandibular teeth by one examiner. Results Both boys and girls in age groups nine to 14 years showed advanced dental age compared to their chronological age which was found to be statistically significant except in age groups nine and 13 years. Saudi boys were 0.3 years and Saudi girls 0.4 years ahead, on average, of French-Canadian children as analyzed by the Demirjian method. Conclusion The standard values for French-Canadian children provided by Demirjian vary slightly for application to Saudi children. As a result, new graphs and tables were produced to convert these maturity scores, calculated by the Demirjian method, to the dental age for Saudi children. Citation Al-Emran S. Dental Age Assessment of 8.5 to 17 Year-old Saudi Children Using Demirjian's Method. J Contemp Dent Pract 2008 March; (9)3:064-071.

scholarly journals Evaluation of Dental Age in Nepali Children using Demirjian’s 7-Teeth Teeth Method

2018 ◽  
Vol 7 (2) ◽  
pp. 37-40
Author(s):  
Rinky Nyachhyon
Keyword(s):  
Age Estimation ◽  
Age Groups ◽  
P Value ◽  
Dental Age ◽  
Dental Age Estimation ◽  
Tooth Formation ◽  
The Mean ◽  
Mean Differences ◽  
Demirjian’S Method ◽  
Dental Maturity

Introduction: Age estimation can be based on tooth formation stages seen on the radiographs. Demirjian’s method is widely used to assess age of individuals with developing dentition. There are not many documented studies of age estimation amongst Nepali population.Objective: To assess the applicability of Demirjian’s method for dental age estimation in Nepali children.Materials & Method: The sample of the study consisted of 186 subjects between 7-16 years of age. Dental age estimation was based on Demirjian’s method and scored by a single observer.Result: The mean and mean differences in chronological and dental ages were calculated, which revealed the overestimation in age groups of 7 and 9 years, whereas there were underestimations in other age groups. The mean differences in age groups 12-16 were highly significant (p-Value <0.05) whereas the mean difference in age groups 7-11 years were not statistically significant.Conclusion: Since there is underestimation range from 0.5 years to 1.23 years, the standards of dental maturity described by Demirjian may not be suitable for Nepali children.

scholarly journals Assessment of Skeletal and Dental Maturity Levels for a given Chronological Age among Indian Children

2012 ◽  
Vol 13 (3) ◽  
pp. 310-315 ◽  
Author(s):  
K Krishna Murthy ◽  
C Nagendra Srinivas ◽  
Varalakshmi LNU ◽  
C Vijay Kumar ◽  
M Krishnaveni
Keyword(s):  
Treatment Planning ◽  
Clinical Significance ◽  
Skeletal Age ◽  
Diagnosis And Treatment ◽  
Chronological Age ◽  
Dental Age ◽  
Indian Children ◽  
The Individual ◽  
Dental Maturity

ABSTRACT Aim The aim of this study was to evaluate the maturity levels of the individual by comparing the correlation between dental, skeletal and the chronological ages. Materials and methods Intraoral periapical radiographs of the complete right side of the dentition and posteroanterior radiographs of the hand and wrist were obtained from 260 subjects, ranged from 3 to 15 years of age. Evaluation of handwrist roentgenograms for skeletal age and intraoral roentgenograms for dental age was done. Results The findings of present study indicated that participated children were skeletally and dentally, retarded in maturation as compared with the standards except at 3 and 6 years of age. The girls were found to be skeletally more advanced than boys at all ages except 7 and 10 years of age. The dental maturity is more for girls than that of boys. Conclusion No significant correlation was found among skeletal age, dental age and chronological age. Dental age and skeletal age was found to be correlated at 6, 10 and 11 years in boys and 6 and 9 years of age in girls. Clinical significance The results of this study could enhance the diagnosis and treatment planning in orthodontics and other dental disciplines. How to cite this article Murthy KK, Srinivas CN, Varalakshmi, Kumar CV, Krishnaveni M. Assessment of Skeletal and Dental Maturity Levels for a given Chronological Age among Indian Children. J Contemp Dent Pract 2012;13(3):310-315.

scholarly journals Relation of serum 25-hydroxyvitamin D status with skeletal muscle mass by sex and age group among Korean adults

2015 ◽  
Vol 114 (11) ◽  
pp. 1838-1844 ◽  
Author(s):  
Min Jung Ko ◽  
Sungha Yun ◽  
Kyungwon Oh ◽  
Kirang Kim
Keyword(s):  
Skeletal Muscle ◽  
Muscle Mass ◽  
Skeletal Muscle Mass ◽  
Age Groups ◽  
Mean Value ◽  
High Serum ◽  
Cross Sectional ◽  
Mean Values ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

AbstractThe objective of this study was to examine whether high serum 25-hydroxyvitamin D (25(OH)D) concentration was associated with high skeletal muscle mass, taking into account the effects of sex and age among the participants of the Korea National Health and Nutrition Examination Survey (KNHANES) aged 40 years or older. This was a cross-sectional study using data from the 2009 to 2010 KNHANES; a total of 8406 subjects (3671 men and 4735 women) were included. The appendicular skeletal muscle mass index (ASMMI, kg/m2) was estimated to measure the skeletal muscle mass. Hypovitaminosis was classified when the level of serum 25(OH)D was <20 ng/ml. The general linear model adjusted for confounding factors was used to determine differences in means of ASMMI by 25(OH)D status. The mean values of ASMMI were higher for men when compared with women. Women had a greater proportion of hypovitaminosis (71·1 %) compared with men (53·2 %). After adjusting for multiple factors, men were seen to have significant differences in ASMMI based on 25(OH)D status regardless of age, showing a lower mean value of ASSMI in those with hypovitaminosis. However, there was no difference in ASMMI by 25(OH)D status among women in both younger and older age groups. In conclusion, we found that there might be a positive relationship between 25(OH)D and skeletal muscle mass in men, indicating that interventions to improve 25(OH)D levels that are aimed at increasing muscle mass could be beneficial for men with more rapid decreased rate of skeletal muscle mass.

​Impact of Extreme Hot Environmental Temperature Period on Marker Enzymes of Carbohydrate Metabolism in Non-descript Sheep from Arid Tracts of Rajasthan

2021 ◽  
Author(s):  
Anandita Srivastava ◽  
Nalini Kataria
Keyword(s):  
Carbohydrate Metabolism ◽  
Environmental Temperature ◽  
Age Groups ◽  
Extreme Temperature ◽  
Mean Value ◽  
Marker Enzymes ◽  
Mean Values ◽  
The Mean ◽  
The Impact ◽  
Enzymes Of Carbohydrate Metabolism

Background: The present investigation was envisaged to find out the impact of extreme hot environmental temperature period (ETP) on marker enzymes of carbohydrate metabolism in male and female non-descript sheep of various age groups i.e. 4 to 13 months from arid tracts of Rajasthan. Glucose-6-phosphate dehydrogenase (G-6-PDH) and malate dehydrogenase (MDH) marker enzymes of carbohydrate metabolism were considered for study. Methods: During the period October 2016-June 2017 blood samples were collected to harvest sera for spectrophotometric method from 240 healthy animals selected from private slaughter house during moderate and extreme hot environmental temperature periods (ETPs). The mean values of markers attained during moderate ETP were reckoned as the control. It was 10.00 ± 0.10 UL-1 and 42.00±1.00 respectively. Conclusion: The mean value of MDH was significantly (p≤0.05) higher while G-6-PDH significantly (p≤0.05) lowers during extreme hot temperature in comparison to moderate period. Therefore, it could be concluded that variations in enzyme markers were associated with changes in environmental temperatures. Probably ETP were able to produce a profound effect on carbohydrate metabolism in sheep. Therfore it can be suggested that during the period of extreme temperature balanced ration must be provided to the animal along with proper management to decrease the severity of temperature impact.

scholarly journals Assessment of the TMJ Dysfunction Using the Computerized Facebow Analysis of Selected Parameters

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Edward Kijak ◽  
Danuta Lietz-Kijak ◽  
Bogumiła Frączak ◽  
Zbigniew Śliwiński ◽  
Jerzy Margielewicz
Keyword(s):  
Age Groups ◽  
Mouth Opening ◽  
Mean Value ◽  
Qualitative And Quantitative Analysis ◽  
Temporomandibular Joint Dysfunction ◽  
Mean Values ◽  
Qualitative And Quantitative ◽  
Maximum Value ◽  
Function Test ◽  
The Mean

The Purpose of the Paper.Qualitative and quantitative analysis of selected parameters of mandible movements, electronically registered in patients with temporomandibular joint dysfunction and healthy ones.Material. Function test of the mandible movements was conducted in 175 patients. Gender distribution was 143 women and 32 men, aged 9 to 84.Methods. The studied population, after accurate clinical examination, was divided into age groups with the range of five years. All the patients had Zebris JMA computerized facebow examination done, according to the generally accepted principles and procedures.Results.Mean values of mouth opening calculated to 45.6 mm in healthy group and 37.6 mm in TMJ dysfunction group. Mean length of condylar path amounted to39±7% of the maximum value of mouth opening in the group of healthy people,44±11% in the case of muscle-based disorders, and35±11% with joint-based. The mean value of the condylar path inclination oscillated in the range of 25° to 45°.Conclusions. The ratio of length of the condylar path to the size of mouth opening may be a significant value characterising the type and degree of intensification of the TMJ dysfunctions.

scholarly journals Accuracy assessment of dental age estimation with the Willems, Demirjian and Nolla methods in Spanish children. Comparative cross-sectional study.

2020 ◽  
Author(s):  
Marta Macarena Paz Cortés ◽  
Rosa Rojo ◽  
Esther Alia García ◽  
Maria Rosa Mourelle Martínez
Keyword(s):  
Accuracy Assessment ◽  
Statistical Tests ◽  
Age Groups ◽  
Wilcoxon Test ◽  
Chronological Age ◽  
Dental Age ◽  
Paired Data ◽  
Cross Sectional ◽  
Demirjian Method ◽  
Willems Method

Abstract Background: The objective of this study was to evaluate and compare the validity and accuracy of the Willems, Demirjian and Nolla methods in predicting chronological age in a Spanish ethnicity population. Methods: A sample of 604 orthopantomographs of Spanish children aged 4 to 14 years was evaluated by two independent evaluators. Descriptive statistics were applied to calculate the chronological age and dental age, presenting the mean and standard deviation. The difference between dental age and chronological age was calculated for each method. A positive result indicated an overestimation and a negative figure indicated an underestimation. The Wilcoxon test for paired data and Spearman's correlation coefficient were applied by age groups and gender to compare the chronological age and dental age of each method (that of Willems, Demirjian and Nolla). Statistical tests were performed at a 95% confidence level. Results: The interexaminer agreement was 0.98 (p = 0.00), and the intraexaminer agreement was 0.99 (p = 0.00). The Willems method significantly overestimated the age of boys (0.35 years (0.93)) and girls (0.17 years (0.88)). The Demirjian method significantly overestimated the age of boys (0.68 years (0.95)) and girls (0.73 years (0.94)). The Nolla method significantly underestimated age in boys (0.44 years (0.93)) and girls (0.82 years (0.98)). Conclusions: In the Spanish population, the use of the Demirjian method for legal and medical purposes is frequent. This study reveals that the Willems method is more appropriate due to its greater precision in estimating dental 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.

Dental Maturity in Children with a Complete Bilateral Cleft Lip and Palate

2002 ◽  
Vol 39 (5) ◽  
pp. 509-512 ◽  
Author(s):  
Kiki L.W.M. Heidbüchel ◽  
Anne M. Kuijpers-Jagtman ◽  
Ricardo Ophof ◽  
Rian J.M. Van Hooft
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Medical Center ◽  
Age Groups ◽  
Dental Age ◽  
Regression Curves ◽  
Bilateral Cleft Lip ◽  
Dutch Children ◽  
Dental Maturity ◽  
Insight Into

Objective: Dental age in children with a bilateral cleft lip and palate (BCLP) was assessed and compared with children without cleft. Design: Dental age was estimated for 74 children with a complete BCLP (54 boys and 20 girls) from 364 orthopantomograms. Nonlinear regression curves were made between 5 and 14 years of age for boys and girls separately. A comparison was made with a sample of Dutch children (91 girls and 90 boys) without oral clefts for three different age groups, namely 5, 9.5, and 14 years of age. Setting: Data collection was carried out at the Cleft Palate Center, University Medical Center Nijmegen (The Netherlands). A sample from the Nijmegen Growth Study was used as a normative sample. Results: At 5 years of age, boys with a BCLP were significantly delayed in dental age compared to boys without cleft. After that age, no significant differences in dental age were found. For girls with a BCLP, no difference in dental age with the girls without cleft could be found. Conclusion: Dental age in BCLP showed a tendency to be delayed at 5 years of age. At the ages of 9.5 and 14 years of age, no differences were found. Further investigation on the development of individual teeth is suggested to gain more insight into the origin of this delay.

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