Introduction: One of the most difficult problems in orthodontic treatment with fixed appliances is enamel demineralization around the brackets. This iatrogenically caused white spot lesions leads to poor esthetics; and in severe cases it may need restorative treatment. Objective: To evaluate in vivo effect of Amorphous Calcium Phosphate (ACP)-containing orthodontic composite on enamel demineralization around orthodontic brackets, and to compare it with the conventional resin based orthodontic composite. Materials & Method: 20 orthodontic patients planned for four first premolars extraction were selected for the study. All first premolars were bonded with Aegis Ortho, an ACP-containing orthodontic composite (experimental group), and Transbond XT, a resin-based orthodontic composite (control group). After 45 days teeth were extracted, sectioned for the microhardness group and evaluated by superficial-microhardness analysis and stereomicroscopic study. Unpaired t-test and analysis of variance (ANOVA) test was performed. Result: The ANOVA showed statistically significant differences for position, material, depth, and their interactions (p <0.001). The multiple comparison test showed that the ACP-containing orthodontic composite was significantly more efficient than the conventional composite, reducing enamel demineralization in almost all evaluations (p <0.001). The stereomicroscopic examinations showed a lesser extent of demineralization around orthodontic brackets for the ACP-containing orthodontic composite group. Conclusion: ACP-containing orthodontic composite for bonding orthodontic brackets successfully inhibited demineralization, which was localized to the area around the brackets.

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Aims and Objective The purpose of this study was to examine different components of a smile in subjects with class I occlusion and to formulate a comprehensive photographic analysis of a smile. This study was designed to find a correlation between upper lip elevation and retraction with upper lip morphology during smiling among male and female groups. Materials and Methods Lateral cephalogram and standardized frontal photographs were taken at rest and smiling. Results A significant sexual dimorphism was apparent in several of the parameters studied. Middle portion of lower border of upper lip (MUL’-MUL) rose significantly higher by 0.91 mm in the male group than in the female group, during smiling (P = 0.003). Decrease in vermillion display (VE-VE’) was significantly higher in the male group than the in female group by 0.668 mm (P = 0.021). Conclusion This comprehensive study of lip mobility, when applied to a larger population can enable us to further evaluate the correlation between lip morphology and mobility.