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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.&#x0D;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.&#x0D;Materials &amp; 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.&#x0D;Result: The ANOVA showed statistically significant differences for position, material, depth, and their interactions (p &lt;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 &lt;0.001). The stereomicroscopic examinations showed a lesser extent of demineralization around orthodontic brackets for the ACP-containing orthodontic composite group.&#x0D;Conclusion: ACP-containing orthodontic composite for bonding orthodontic brackets successfully inhibited demineralization, which was localized to the area around the brackets.&#x0D; 

orthodontic journal of nepal/orthodontic journal of nepal

Comparative Study of Amorphous Calcium Phosphate-containing Orthodontic Composite and Conventional Orthodontic Adhesive on Enamel Demineralization around Orthodontic Brackets – An in vivo Study