The early pioneers of orthodontics, like Angle, Kingsley and Farrar, devised appliances that have now evolved into what is known as the preadjusted edgewise appliance. With the introduction of preadjusted appliances, the focus has moved to customization of brackets to achieve specific and exact positioning of the dentition. These preprogramed features of the orthodontic bracket can be completely effective only if the bracket slot is accurate. Aims and objectives:The purpose of this study is to evaluate the slot size of eight different commercially available straight wire brackets of 0.018 inch slot and 0.022 inch slot with two different measuring devices. Materials and methods: Out of 80 straight wire brackets (Roth), 40 each of 0.018 inch slot and 0.022 inch slot from four commercially available manufacturers (3M Unitek, TP, Ortho Organizers and Ormco) were used for the study. Each bracket sample from all the eight groups was measured for its slot size at the top and the base of the slot using two different measuring devices namely Starrett profile projector and PrakaVision profile projector. Both the measuring devices give a digital read out to the accuracy of 0.001 mm. Data obtained were subjected to statistical analysis. Results:The slot size for ortho organizer-0.018 inch slot brackets was very close to the standard, whereas the other brackets were either oversized or undersized as compared to the standard.

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Objectives: The aim of the study was to evaluate and compare the rate of maxillary canine retraction in cases with modified corticotomy versus without modified corticotomy. Clinical interventional study. Split mouth design was used. Materials and Methods: A sample size of ten patients and 20 sites were selected within the age group of 18–35 years following all criteria of the study. Before orthodontic leveling and alignment, upper first premolar extraction was carried out under local anesthesia. Pre-treatment OPG and IOPA were taken in relation to the maxillary canine and maxillary second premolar teeth. One extraction side was considered as the experimental site and contralateral side as control. Leveling and alignment were started with wire sequence. After modified corticotomy procedure, the canine retraction was started with 8 mm NiTi closed coil spring. The amount of tooth movement was recorded with the help of a Digital Vernier Caliper at an interval of 1 month till the completion of canine retraction. Results: Paired t-test showed higher mean velocity of tooth movement in modified corticotomy side (1.07 ± 0.25) as compared to the conventional side (0.91 ± 0.24), (P < 0.001). Conclusion: The modified corticotomy technique serves as an effective treatment modality for adults seeking orthodontic treatment with increased rate of orthodontic canine retraction.

This study was done to determine & correlate the lip print patterns in Skeletal Class I & Class II malocclusions. A sample of 160 individuals (80 skeletal Class I & 80 skeletal Class II malocclusion) aged 12 years and above, were selected for the study. A dark coloured lipstick was applied onto the cleaned & dried lips with a single stroke. A lip impression was made on a transparent cellophane tape strip which was removed & stuck to a white bond paper. Lip print patterns were analysed based on the Tsuchihashi classification i.e. Type I, Type I’, Type II, Type III, Type IV & Type V. The field of observation was confined to 10mm on either side of the quadrant from the midline and the pattern was resolved by counting highest number of lines in this area. Statistical analyses indicated that the prevalence of Type I & Type II lip pattern was significantly higher in Skeletal Class I & Class II malocclusion subjects respectively. The results showed a significant correlation between lip prints and skeletal sagittal malocclusion. Cheiloscopy can act as an early indicator of skeletal malocclusions, but further research is required for the evaluation of lip prints in a larger sample with distinctinherited malocclusions.