Introduction: Recognizing dental and skeletal developmental stages from cephalometric and panoramic radiographs is very useful to assess physiologic maturity without resorting to any special radiograph. Objectives: 1. Dental age determination from panoramic radiograph using Demirjian method. 2. Skeletal age determination from lateral cephalometric radiograph using Hassel and Farman method. 3. To evaluate the nature of interrelationship between Chronological, Dental and Skeletal age. Methods: The sample for study consisted of 160 radiographs (80 panoramic radiographs and 80 cephalometric radiographs) of 40 boys and 40 girls randomly selected from various schools of Ahmedabad, Gujarat, India in the age group of 6 to 13 years known chronological age. Data was collected and analyzed. Results: A strong correlation exists between Chronological and assessed Dental age in both genders of 7-12age. (r = 0.8) A moderate correlation exists between Chronological and assessed Skeletal age in both genders of 9-13age (r =0.4) A moderate correlation exists between assessed Skeletal and Dental age in both genders of 9-13age (r =0.6) Conclusions: Significant strong correlation was found among Chronological and assessed Dental age. Girls showed an early maturation over boys of the same age group.

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Background: The orthodontic objectives are best achieved when the individual is treated as a whole. It is important to understand the perception of individuals towards the orthodontic procedure. Objectives: The aim was to evaluate the perception and explore the reasons responsible for the patient wanting to undergo orthodontic treatment. Materials and Methods: A questionnaire survey was done on 150 individuals reporting to Department of Orthodontics, IOTN and DAI indices on same individuals were recorded. Results: Out of 150 individuals, in this study, 44% individuals were the first one to notice malocclusion, while mothers were the first to notice malocclusion in 34.66% individuals. Most of the individuals expected positive change in aesthetics and self confidence, improvement in dental health and carrier opportunities after orthodontic treatment. TMJ disorder, speech problem and chewing problem were noticed by 4 individuals. Conclusion: It was concluded that 1) Aesthetics was the main factor for seeking orthodontic treatment followed by functional needs. Although aesthetics is the prime concern of individuals seeking for orthodontic treatment, only 12% subjects need indispensible treatment need according to DAI index. Treatment need differs on aesthetics (DAI) and severity of malocclusion (IOTN). When severity of malocclusion is taken into account 88% subjects needed little or borderline treatment. On determining treatment need considering aesthetics 84% subjects needed little or borderline treatment which reflects the awareness of the people concerned about their aesthetics.

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Introduction: In the last decades the application of the Finite Element Methodology (FEM) has become popular. It can calculate stresses and displacement in complex structures and can anticipate the tissue responses to orthodontic mechanics applied for treating different malocclusions. This study evaluated and compared the stress patterns and teeth displacement with application of 450g of intrusive force bilaterally on maxillary posterior segment utilizing a conventional old method, High-Pull Headgear (HPHG) and a newer method, Infrazygomatic Crestal Bone Screw (IZC-BS) using 3D-FEM. Method: A 3D-FEM model of the craniomaxillary segment with maxillary teeth was reconstructed from the Cone Beam Computed Tomographic image of a patient with class II div I malocclusion on class II skeletal base with anterior open bite and 450g of intrusive force was applied bilaterally on maxillary posterior segment utilizing HPHG and IZC-BS and stress patterns and teeth displacement were studied and compared. Result: Von Mises stresses on Zygomaticomaxillary, Zygomaticotemporal and Pterygomaxillary sutures and surface landmarks on maxillary, zygomatic, temporal and sphenoid bones were more pronounced and generalized for HPHG group. Intrusion, expansion and sagittal displacement of maxillary posterior segment were also more pronounced with HPHG group. Stresses weren’t present at the apical root areas of the maxillary posterior teeth for both the groups. Conclusion: On applying equal amount of intrusive force bilaterally to the maxillary posterior segment, stress patterns and teeth displacement were more pronounced and effective for HPHG group however; apical root areas of the maxillary posterior teeth in both the groups didn’t show any stresses.