Objective: The study was conducted to evaluate stress pattern and deformation in mid-palatal suture and posterior dentoalveolar area during maxillary expansion therapy with two different types of rapid maxillary expansion by finite element method study. Methods and Methodology: The finite element analysis was performed on a model of maxilla, with narrow maxillary base and teeth digitally reconstructed, based on CBCT images, acquired by child (age 12.5 years) but not in permanent dentition stage from available pool data. Result: More amount of stress was observed in mid-palatal suture and posterior dental alveolar area by using the Hyrax appliance as compared to the Haas appliance. Stress pattern evaluated in mid-palatal suture depicts maximum stress concentration on the anterior region of mid-palatal suture at the position of incisive papilla. Deformation in maximum quantity is observed in central incisors. Maximum stress generation and deformation are observed in lingual region of premolar and molar areas. Minimum stress generation and deformation are observed in the posterior part of last molars. Conclusion: Hyrax produces more stress and deformation in mid-palatal suture as well as in the posterior alveolar segment in comparison to Haas appliance. Better results in the immediate skeletal response were obtained by the Hyrax-type expander as compared to the Haas type.

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Introduction:In the field of Orthodontics and Dentofacial Orthopedics, in-depth knowledge of incisor inclination & dentoalveolar height in different facial growth patterns is essential to reach ideal treatment for every patient. Objectives: Assess and compare anterior and posterior dentoalveolar height and incisor inclination in maxilla and mandible in different facial growth pattern in vertical plane. Materials and Methods: In this study, lateral cephalogram of total 90 patients were traced. The sample was divided into horizontal, average and vertical growth pattern based on Jarabak's ratio. The maxillary and mandibular incisor inclination and dentoalveolar height of anterior and posterior region were evaluated and analysed statistically. Results: This study revealed that incisor inclination and dentoalveolar height showed statistically significant difference among different growth patterns. Incisor inclination and anterior dentoalveolar height in maxilla and mandible were increased in vertical growth pattern. Posterior dentoalveolar heights were also more in maxilla and mandible but the result was not statistically significant. Conclusion: This study showed that there is a statistically significant relationship between incisor inclination, dentoalveolar height and facial growth pattern of an individual.

Aim: Orthodontic treatment is routinely carried out in patients with the purpose of correcting various forms of dental malocclusions. Retraction of the canines can be achieved either individually or along with incisor. Pentraxin-3 (PTX-3) is regarded as the true independent indicator of disease activity. Hence, we undertook the present study to assess and compare the level of PTX-3 in patients undergoing canine retraction with active tieback and Nickel-Titanium (NiTi) coil spring. Materials and methods:The present study included assessment of 25 patients that underwent canine retraction as a part of fixed orthodontic treatment. In the maxillary right and left quadrant, active tieback and NiTi coil spring were used respectively. Gingival crevicular fluid samples were collected 1 hour prior to the commencement of orthodontic canine retraction procedure followed by collection at following time intervals: 1 hour, 1, 7, and 14 days after the start of canine retraction procedure. Enzyme-linked immunosorbent assay kit was used for analysis of the samples as per manufacturer's instructions. All the data were recorded and compiled. All the results were analyzed by Statistical Package for the Social Sciences software. Results Conclusion:In comparison to the active tieback, NiTi coil exhibited faster space closure rate. Clinical significance:In patients undergoing orthodontic treatment, PTX-3 is associated with periodontal remodeling under the effect of orthodontic forces.

: In the field of Orthodontics and Dentofacial Orthopedics, in-depth knowledge of mandibular morphology and different types of growth pattern is essential to reach to ideal treatment for every patient.To compare antegonial notch depth, symphysis morphology and ramus morphology among different growth patterns. 2) To correlate antegonial notch depth with other parameters of mandibular morphology.: In this study, lateral cephalogram of total 90 patients were traced. The sample was divided into horizontal, average and vertical growth pattern based on Jarabak’s ratio. The antegonial notch depth, symphysis morphology (i.e. its height, depth, ratio and angle) and ramus morphology (its height and width) were evaluated and analysed statistically. The symphysis ratio is the ratio of symphysis height to symphysis width. : This study revealed that antegonial notch depth, symphysis angle and ramus height shows statistically significant difference among different growth patterns. In vertical growth pattern, antegonial notch depth is positively correlated with symphysis height, symphysis depth, ramus height and ramus width whereas it is negatively correlated with symphysis ratio and symphysis angle and exactly opposite is true for horizontal growing individuals. : This study concluded that there is correlation between mandibular morphology and growth pattern of an individual.