Comparative clinical study of the effectiveness of different dental bleaching methods - two year follow-up
J. appl. oral sci
;
20(4): 435-443, July-Aug. 2012. ilus, graf, tab
Article
in English
| LILACS
| ID: lil-650620
ABSTRACT
This study evaluated color change, stability, and tooth sensitivity in patients submitted to different bleaching techniques. MATERIAL AND METHODS:
In this study, 48 patients were divided into five groups. A half-mouth design was conducted to compare two in-office bleaching techniques (with and without light activation) G1 35% hydrogen peroxide (HP) (Lase Peroxide - DMC Equipments, São Carlos, SP, Brazil) + hybrid light (HL) (LED/Diode Laser, Whitening Lase II DMC Equipments, São Carlos, SP, Brazil); G2 35% HP; G3 38% HP (X-traBoost - Ultradent, South Jordan UT, USA) + HL; G4 38% HP; and G5 15% carbamide peroxide (CP) (Opalescence PF - Ultradent, South Jordan UT, USA). For G1 and G3, HP was applied on the enamel surface for 3 consecutive applications activated by HL. Each application included 3x3' HL activations with 1' between each interval; for G2 and G4, HP was applied 3x15' with 15' between intervals; and for G5, 15% CP was applied for 120'/10 days at home. A spectrophotometer was used to measure color change before the treatment and after 24 h, 1 week, 1, 6, 12, 18 and 24 months. A VAS questionnaire was used to evaluate tooth sensitivity before the treatment, immediately following treatment, 24 h after and finally 1 week after.RESULTS:
Statistical analysis did not reveal any significant differences between in-office bleaching with or without HL activation related to effectiveness; nevertheless the time required was less with HL. Statistical differences were observed between the results after 24 h, 1 week and 1, 6, 12, 18 and 24 months (intergroup). Immediately, in-office bleaching increased tooth sensitivity. The groups activated with HL required less application time with gel.CONCLUSION:
All techniques and bleaching agents used were effective and demonstrated similar behaviors.
Full text:
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Index:
LILACS (Americas)
Main subject:
Peroxides
/
Tooth Bleaching
/
Urea
/
Color
/
Tooth Bleaching Agents
/
Hydrogen Peroxide
Type of study:
Controlled clinical trial
/
Observational study
/
Prognostic study
Limits:
Adolescent
/
Adult
/
Humans
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2012
Type:
Article
/
Project document
Affiliation country:
Brazil
Institution/Affiliation country:
University of São Paulo/BR
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