Comparison of Accuracy Between Pulp/Tooth Ratio and Tooth Coronal Index Methods for Dental Age Estimation Using Digital Panoramic Radiographs

Objective: To evaluate the reliability and the accuracy of Tooth Coronal Index (TCI) and Pulp/Tooth Ratio (PTR) methods in dental age estimation using digital panoramic radiography. Material and Methods: In this cross-sectional study, 237 dental panoramic images were collected. The two methods (TCI and PTR) were applied to all left mandibular first and second molars based on inclusion and exclusion criteria. In order to analyze the acquired data, statistical methods were used. The estimated ages derived by exclusive formula were compared to the chronological age, and the error ranges for each indicator were measured to determine their accuracy. Results: There were negative correlations between PTR in the first molar (r=-0.89) and in the second molar (r=-0.788), as well as TCI in the first molar (r=-0.587) and in the second molar (r=-0.242). In this study, we found that the Pulp/Tooth Ratio (PTR) accuracy rate for mandibular first and second molar teeth was 79.21% and 62.09 %, respectively, although the Tooth Coronal Index (TCI) value for these teeth was 34.45% and 5.85%. Conclusion: Pulp/Tooth Ratio and Tooth Coronal Index are potential age estimation indices. Although PTR was the more accurate one in our study. The results also demonstrated that indices related to the first molar tooth could be used to estimate age with greater accuracy and validity

Comparison of Accuracy Between Pulp/Tooth Ratio and Tooth Coronal Index Methods for Dental Age Estimation Using Digital Panoramic Radiographs

Objective: To evaluate the reliability and the accuracy of Tooth Coronal Index (TCI) and Pulp/Tooth Ratio (PTR) methods in dental age estimation using digital panoramic radiography. Material and Methods: In this cross-sectional study, 237 dental panoramic images were collected. The two methods (TCI and PTR) were applied to all left mandibular first and second molars based on inclusion and exclusion criteria. In order to analyze the acquired data, statistical methods were used. The estimated ages derived by exclusive formula were compared to the chronological age, and the error ranges for each indicator were measured to determine their accuracy. Results: There were negative correlations between PTR in the first molar (r=-0.89) and in the second molar (r=-0.788), as well as TCI in the first molar (r=-0.587) and in the second molar (r=-0.242). In this study, we found that the Pulp/Tooth Ratio (PTR) accuracy rate for mandibular first and second molar teeth was 79.21% and 62.09 %, respectively, although the Tooth Coronal Index (TCI) value for these teeth was 34.45% and 5.85%. Conclusion: Pulp/Tooth Ratio and Tooth Coronal Index are potential age estimation indices. Although PTR was the more accurate one in our study. The results also demonstrated that indices related to the first molar tooth could be used to estimate age with greater accuracy and validity

Evaluation of Oral and Dental Health Status in Hemophilic Children and Adolescents in the City of Rasht

Aim:Patients with hemophilia need special care and attention in dentistry. Thus, we assessed the oral and dental health status in children and adolescents with hemophilia in Rasht, Iran.Materials and Methods:In this case-control study, 53 hemophiliac patients (A and B), 2-15 years of age, and 53 healthy children were assessed. A checklist including demographic data was filled out and the subjects were examined by one dentist. The patients were assessed for modified gingival index, plaque index (PI) and Decayed-missing-filled teeth [(DMFT) in permanent teeth and Decayed-missing-filled teeth (dmft) in primary teeth)] indices. Data were analyzed with SPSS 19 at a significance level of p<0.05.Results:The mean age of the subjects was 10.49±4.21 years in the case group and 10.5±4.07 years in the control group. 92.5% of the patients exhibited factor VIII deficiency and the most frequent blood group was A (34%). 63.2% of the subjects in the hemophilia group and 13.2% in the control group had a history of bleeding that was significant (p=0.0001). There were significant differences between the two groups in bleeding at tooth eruption and exfoliation sites of deciduous teeth (p=0.0001), flossing (p=0.046), toothpick use (p=0.02) and the history of dental education (p=0.014). No significant difference was found between dmft and DMFT scores between the two groups but DMFS was significantly higher in the hemophilia group (p=0.007). There was also a significantly higher PI in the hemophilia group (p=0.003).Conclusion:Considering some unsatisfactory oral health conditions in these patients, dental health care and prevention seems necessary and can be effective in the prevention of dental problems, bleedings and complex treatments