A Clinical Evaluation of Two In-office Bleaching Regimens With and Without Tray Bleaching

Abstract

This study evaluated the degree of color change of teeth, the rebound effect and the sensitivities of teeth and gingiva associated with the use of an in-office bleaching agent followed by an at-home bleaching agent to lighten stained teeth in an in vivo study. Thirty-seven subjects who met the Inclusion/Exclusion criteria were divided into two cells. Twenty-five subjects received three 15-minute in-office bleaching treatments in succession with 36% hydrogen peroxide (HP) on the maxillary anterior teeth, followed by at-home overnight bleaching with 15% carbamide peroxide (CP) for seven days on one side of the dental arch. Twelve other subjects received a 40-minute in-office bleaching treatment on their maxillary anterior teeth, followed by at-home overnight bleaching for seven days on one side of the dental arch with the same product. The cells of teeth on the other side of the dental arch received the same in-office treatment but were not bleached overnight for seven days. Color was subjectively evaluated using the Vitapan Classical Shade Guide and was objectively evaluated using the Chroma Meter at the baseline appointment, immediately after in-office bleaching and at 4, 7 and 14 days and 3 months after the in-office treatment. For two weeks, the subjects completed sensitivity evaluations of gingival tissues and hard tooth tissues. The cells that did not receive the at-home bleaching had significantly less color change than the cells that received at-home bleaching. The cell that was bleached for 40 minutes and received the at-home treatment had significantly less overall change (deltaE) at 14 days and 3 months than the cell that received three 15-minute treatments with the at-home treatment. Throughout the study, the subjects in the three 15-minute treatment cells had less gingival and tooth sensitivity than the other cells.

The influence of desensitizing dentifrices on pain induced by in-office bleaching

“…The Vitapan Classical guide (Vita Zahnfabrik RauterGmbH H. & Co, BädSackingen, Germany) was organized according to a scale of values numbered 1-16. 3,4,24,25 The first in-office bleaching session was performed in the maxillary arch. 3,24 A resin barrier (Top Dam, FGM, Joinville, Brazil) and a lingual / lip retractor (Arcflex, FGM, Joinville, Brazil) were used.…”

“…3,4,24,25 The first in-office bleaching session was performed in the maxillary arch. 3,24 A resin barrier (Top Dam, FGM, Joinville, Brazil) and a lingual / lip retractor (Arcflex, FGM, Joinville, Brazil) were used. The whitening gel (35% HP Whiteness HP Blue Calcium, FGM, Joinville, Brazil) was applied on the buccal surfaces of the right second premolar through to the left second premolar, and left for 40 minutes.…”

“…This sary before performing the new evaluation, since most of the color variation due to the rebound effect occurs in the first week after bleaching. 24 Values ranging from 1 (B1) to 16 (C4) were determined for each Vitapan Classical Guide shade, and the color change was assessed based on the difference between the initial and final colors. 25 A statistical analysis was performed to determine the sensitivity reported by the patients, and the color changes were analyzed subjectively based on the Vitapan scale.…”

Review of the Effectiveness of Various Tooth Whitening Systems

“…15 The objective of another study was to determine whether the use of reservoirs during daytime bleaching made a difference in the effectiveness of a product, 16 while another study tested the null hypothesis that there was no difference between using the same equivalent concentrations of HP in agents containing HP and CP 17 and the last split mouth study that compared the use of at-home vs in-office toothwhitening agents. 3 Three studies in this meta analysis were not accomplished as split-mouth design studies, but on different cells of subjects.…”

Farkli Ofi̇s Ti̇pi̇ Beyazlatma Si̇stemleri̇ni̇n Beyazlatma Etki̇nli̇kleri̇ni̇n Ve Renk Stabi̇li̇teleri̇ni̇n Karşilaştirilmasi

“…21 Matis ve ark. 22 renk seçiminde spektrofotometrelerin göz ile renk seçimine veya fotoğrafa bakarak yapılan renk seçimine göre daha güvenilir olduğunu bildirmiştir. Bu çalışmada, örnekler renklenme derecelerinin standardize edilmesi için beyazlatma öncesi Orange II boyası ile renklendirilmiştir.…”