The aims of this study are: to compare the efficacy of three different dental bleaching products; to evaluate colour relapse following dental bleaching treatment at 1, 3 and 6 months follow up; to evaluate the impact in quality of life from dental bleaching treatments. Products to be used represent three different techniques and formulations: in office, universal tray and custom tray (respectively VivaStyle Paint On Plus (Ivoclar Vivadent, Liechtenstein), Opalescence GO 6% (Ultradent, USA) and Opalescence PF 15% (Ultradent, USA). All products contain 6% hydrogen peroxide or its equivalent.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
90
Procedure of tooth bleaching using products with 6% hydrogen peroxide or its equivalent, specifically the PaintOn Plus Vivastyle 6% HP (Ivoclar Vivadent)
Evaluation of oral quality of life after dental bleaching treatment with PaintOn Plus Vivastyle 6% HP (Ivoclar Vivadent) using an oral quality of life measuring questionnaire, specifically the Oral Health Impact Profile-14
Procedure of tooth bleaching using products with 6% hydrogen peroxide or its equivalent, specifically the Opalescence GO 6% HP (Ultradent)
Evaluation of oral quality of life after dental bleaching treatment with Opalescence GO 6% HP (Ultradent) using an oral quality of life measuring questionnaire, specifically the Oral Health Impact Profile-14
Procedure of tooth bleaching using products with 6% hydrogen peroxide or its equivalent, specifically the Opalescence PF 16% CP (Ultradent)
Evaluation of oral quality of life after dental bleaching treatment with Opalescence PF 16% CP (Ultradent) using an oral quality of life measuring questionnaire, specifically the Oral Health Impact Profile-14
Faculty of Dental Medicine of the University of Lisboa
Lisbon, Portugal
RECRUITINGChange on visually determination of tooth colour
Determination of tooth colour using a visual tooth shade guide
Time frame: 2 weeks (before and after treatment)
Change on spectrophotometer determination of tooth colour
Determination of tooth colour using a spectrophotometer
Time frame: 2 weeks (before and after treatment)
Subjective evaluation of tooth colour change during follow-up
Determination of tooth colour relapse using visual tooth shade guide (VITA shade guide)
Time frame: 1, 3 and 6 months
Change on quality of life during treatment and follow-up
Impact on quality of life using an oral quality of life measuring questionnaire, the Oral Health Impact Profile 14 (OHIP-14). The OHIP-14 ranges from 0 to 56 (final sum of all the seven subscales), with higher scores indicating poorer quality of life.
Time frame: 2 weeks (before and after treatment), 1 month, 3 months and 6 months
Objective evaluation of tooth colour change during follow-up
Determination of tooth colour relapse using a spectrophotometer
Time frame: 1, 3 and 6 months
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