Acceleration of cardiovascular-biological age by amphetamine exposure is a power function of chronological age

Assessment of correlation between chronological age and modified Demirjian estimated dental age

BACKGROUND AND AIM: This study was designed to assess the correlation between chronological age and modified Demirjian estimated dental age.METHODS: Panoramic radiographs of 183 Patients between 13.5 and 20.5 years old were assessed for the developmental stage of lower right third molars. Student’s t-test was used to measure the same hypothesis of the chronological age and estimated modified De...

Prediction of chronological age based on Demirjian dental age using robust ridge regression method

Introduction: Estimation of age has an important role in legal medicine, endocrine diseases and clinical dentistry. Correspondingly, evaluation of dental development stages is more valuable than tooth erosion. In this research, the modeling of calendar age has been done using new and rich statistical methods. Considerably, it can be considering as a practicable method in medical science that is...

Biological versus chronological ovarian age: implications for assisted reproductive technology

BACKGROUND Women have been able to delay childbearing since effective contraception became available in the 1960s. However, fertility decreases with increasing maternal age. A slow but steady decrease in fertility is observed in women aged between 30 and 35 years, which is followed by an accelerated decline among women aged over 35 years. A combination of delayed childbearing and reduced fecund...

The European refugee crisis and biological age-Is it right to use skeletal maturity as an estimate of chronological age?

Evaluation of the accuracy of Demirjian method in estimating chronological age

Background and Aim:  Age estimation is one of the most important issues in forensic medicine, legal cases and orthodontic treatment. One of the most famous methods which is based on the maturity of teeth for determining dental age is Demirjian method. Due to the inconsistency of the results of studies conducted on different people groups, the present study was done to evaluate the accuracy of D...