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J Korean Acad Conserv Dent. 2010 Jan;35(1):40-50. Korean. Original Article.
Kim SY , Park JU , Kim CH , Yang SE .
Department of Conservative Dentistry, Seoul St. Mary's Hospital, Catholic University of Korea.
Department of Oral and Maxillofacial Surgery, Seoul St. Mary's Hospital, Catholic University of Korea.

This study evaluated the efficacy of an office bleaching gel (RemeWhite, Remedent Inc., Deurle, Belgium) containing 30% hydrogen peroxide. 31 volunteers were recieved office bleaching with the RemeWhite for 3 times at one visit, total 2 visits. As control group, the same gel in which hydrogen peroxide was not included was applied to 31 volunteers with the same protocol. The shade change (DeltaE*, color difference) of 12 anterior teeth was measured using Colorimerter and Vitapan classical shade guide. The shade change of overall teeth in the experimental group was significantly greater than that in the control group which was measured using Colorimeter. There was also a significant difference between baseline and 14 weeks or 26 weeks though color rebounding phenomenon occurred as time went by. Small shade change difference can be measured accurately using Colorimeter than using Vitapan classical shade guide.

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