Abstract
The search for materials able to remineralize human hard tissues is a modern medical challenge. In this study, the protective effect on the enamel microhardness by a paste based on hydroxyapatite and sodium fluoride (Remin Pro) was evaluated after two different enamel bleaching procedures. Forty sound human incisors were randomly assigned to different treatments: bleaching with an in-office agent (Perfect Bleach Office+); bleaching with an at-home agent (Perfect Bleach); bleaching with the in-office agent followed by the prophylaxis paste; bleaching with the at-home agent followed by the prophylaxis paste; no treatment (control). Bleaching was performed at 0, 8, 24 and 32 h, followed by a 3-min re-mineralizing treatment in the subgroups designed to receive it. Specimens underwent a micro-hardness tester and a mean Vickers Hardness number was considered for each specimen. ANOVA exhibited significant differences among groups. Post-hoc Tukey testing showed significant micro-hardness decrease after the application of both the two bleaching agents. The treatment with prophylaxis paste significantly increased the micro-hardness values of bleached enamel.
Highlights
In recent years, the search for a pleasant smile with whiter teeth has become one of the most common desires among patients [1]
The present study aimed to evaluate the remineralization effectiveness of a prophylaxis paste (Remin Pro), based on hydroxyapatite and sodium fluoride, after treating enamel with two different kinds of whitening
This study revealed that the micro-hardness values of bleached enamel treated with Remin
Summary
The search for a pleasant smile with whiter teeth has become one of the most common desires among patients [1]. Color is considered as an important factor in aesthetics and a chromatic alteration of the tooth is perceived by the patient more quickly than any other anatomical dental modification [2]. This is the reason for the widespread interest in teeth bleaching [3,4], carried out using carbamide or hydrogen peroxide. It has been demonstrated that teeth whitening brings a great aesthetic benefit for the patients and, with an accurate diagnosis, planning of appropriate procedure and attention to technique, this treatment is a conservative approach to lightening discolored teeth [5] with an efficacy widely reported in literature [6,7]. Findings concerning the safety of whitening products on the enamel seem to be controversial [8,9].
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