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KMID : 0362320080330050463
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Journal of Korean Academy of Operative Dentistry
2008 Volume.33 No. 5 p.463 ~ p.471
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The effectiveness of sealing technique on in-office bleaching
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Lee Yoon
Park Jeong-Won
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Abstract
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This study investigated the clinical effectiveness and safety of sealed bleaching compared to conventional in-office bleaching using a randomized clinical trial of split arch design. Ten participants received a chairside bleaching treatment on the upper anterior teeth, and each side was randomly designated as sealed or control side. A mixture of Brite powder (PacDent, Walnut, USA), 3% hydrogen peroxide and carbamide peroxide (KoolWhite, PacDent, Walnut, USA) were used as bleaching agent. The control side was unwrapped and the experimental side was covered with a linear low density polyethylene (LLDPE) wrap for sealed bleaching. The bleaching gel was light activated for 1 hour. The tooth shades were evaluated before treatment, after treatment, and at one week check up by means of a visual shade (VS) assessment using a value oriented shade guide and a computer assisted shade assessment using a spectrophotometer (SP). The data were analyzed by paired t-test. In the control and sealed groups, the visual shade scores after bleaching treatment and at check up showed statistically significant difference from the preoperative shade scores (p<.05). The shade scores of the sealed group were significantly lighter than the control immediately after bleaching and at the check-up appointment (p<0.05). Compared to prebleaching status, the values at post bleaching condition were for the control and sealed groups, respectively. The values at check up were for the control and sealed groups. values were greater for the sealed group both after bleaching (p<.05) and at check up (p<.05). In conclusion, both and shade score changes were greater for the sealed bleaching group than the conventional bleaching group, effectively demonstrating the improvement of effectiveness through sealing.
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KEYWORD
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in-office bleaching, LLDPE wrap, sealed bleaching technique, tooth shade
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