Girish Chaudhary; Anshul Chaudhry; Armaan Pandher; Priyanka Kapoor; Aman Chowdhry; Sanghamitra Jena
Abstract
Aim: The original Demirjian method for dental age estimation is very lengthy, because it involves a number of charts to estimate the dental age. So, a simplified comprehensive chart (DAEcc) was developed to facilitate dental age estimation by the Demirjian method. The aim of the study was to check the ...
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Aim: The original Demirjian method for dental age estimation is very lengthy, because it involves a number of charts to estimate the dental age. So, a simplified comprehensive chart (DAEcc) was developed to facilitate dental age estimation by the Demirjian method. The aim of the study was to check the applicability and reproducibility of the simplified comprehensive DAEcc chart for dental age estimation by a group of dental interns.Methods: Twenty-eight interns were trained to identify the correct stage of calcification on dental radiographs by tracing seven mandibular permanent teeth (lower central and lateral incisors, canine, first and second premolars, first and second molars in the fourth quadrant) on orthopantomographs of the left side. After assigning the corresponding scores, all the scores were summed up and ease of applicability of the simplified method was assessed for dental age estimation.Results: The correlation coefficient between chronological age and dental age as estimated by the interns was 0.995, which showed an excellent correlation; and the average time taken by the interns for the interpretation was 1-2 minutes, which is much less compared to the original method. The excellent correlation and the little time taken by the interns, demonstrate the ease of applicability of this modified chart.Conclusion: Dental age was correctly estimated by dental interns by applying this simplified chart in a significantly shorter time period.
Arezoo Jahanbin; Shirin Dokht Shirazi; Elaheh Kamyabnezhad; Neda Eslami; Seyed Hosein Hoseini Zarch
Abstract
Background: The spheno‐occipital synchondrosis (SOS) is an important growth center which plays an important role in cranial base development and can define the final relation of SOS with the upper and lower jaws. The morphology and fusion degree of SOS varies in different ages among different populations.
Objectives: ...
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Background: The spheno‐occipital synchondrosis (SOS) is an important growth center which plays an important role in cranial base development and can define the final relation of SOS with the upper and lower jaws. The morphology and fusion degree of SOS varies in different ages among different populations.
Objectives: Thus, the aim of this study was to evaluate the age and sex dependence of ossification of the spheno-occipital synchondrosis in the Iranian population using CBCT.
Methods: This cross-sectional retrospective study was performed on 517 CBCT images of 6- to 18-year-old patients in Mashhad, Iran. Patients with obvious pathology or fractures were excluded from the study. The SOS ossification was classified into four stages from 0 to 3. Two independent observers scored the images. The ossification stage of the SOS was classified according to the age and sex of the patients. Kruskal-Wallis and Kendall’s tau-b used for statistical analysis. Results: In this study, 517 samples of 260 females (50.3%) and 257 males (49.7%) with a mean age of 12.03 ± 3.74 years were examined. A significant difference did not exist between males and females regarding their stage of SOS ossification, although males were younger at the SOS transitional stages of 0 to 1, and 1 to 2 compared to females. Also, the SOS starts the ossification process at the age of 11 in females and 10.8 in males.
Conclusions: The present study showed in the mean age of 16.81 ± 1.12 years, most subjects were in developmental stage 3. Due to the fact that in developmental stage 3 SOS closes, there were no passive maxillary growth after this time. In none of the SOS stages, females and males differed significantly in mean age (P > 0.05). The age of the onset of SOS closure in females was 11 years and in males it was about 10.8 years.