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Evaluation of Enamel Surfaces Treated with a Desensitizing Agent Containing CPP-ACP Before or After In-Office Bleaching

Hanife Altinisk, DDS, PhD/Cemile Kedici Alp, DDS, PhD

DOI: 10.11607/prd.6528

Background: To evaluate the effects of MI desensitizing varnish treated before or after bleaching on the mineral component of enamel and surface topography. Methods: The coronal portions of 10 freshly extracted bovine teeth were segmented for a total of forty specimens. Enamel specimens obtained from each tooth were randomly divided into four groups(n=10). Group A:No bleaching. Group B:Bleaching with 40% HP. Group C:MI varnish applied before bleaching. Group D:MI varnish applied after bleaching. The calcium and phosphorus levels of the specimens in each group were determined by EDS. Morphological changes were observed using SEM.The One-way ANOVA, Tukey HSD tests were used for statistical analyses (α=.05). Results: The mean Ca content of Group B was significantly lower than those of Groups A,C, and D(p<0,05). The mean Ca content of Group C was significantly lower than that of Group A(p<0,05). There was no significant difference between the other groups in terms of Ca content(p>0,05). The mean P content of Group A was significantly higher than those of Groups B–D(p<0,05). There was no significant difference between Groups B–D in P content(p>0,05). Conclusions: Application of MI varnish before or after in-office bleaching was effective in reducing mineral loss. However, applying MI varnish after bleaching was more effective. Int J Periodontics Restorative Dent. doi: 10.11607/prd.6528.

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