Bleaching Efficacy, Bleaching; Satisfactory, Bleaching Sensitivity
Conditions
Keywords
Bleaching, Color Stability, Tooth Sensitivity, Surface Roughness
Brief summary
The purpose of this study was to conduct a randomized double-blind clinical trial to examine the efficacy of an in-office bleaching regimen with varied activation modes on color stability, surface roughness, tooth sensitivity, and patient satisfaction.
Detailed description
Tooth discoloration is a common esthetic concern that can negatively impact patients' self-confidence and quality of life. Contemporary restorative dentistry increasingly emphasizes minimally invasive approaches, with vital tooth bleaching emerging as a widely accepted, conservative treatment for managing extrinsic and intrinsic discoloration. The effectiveness of bleaching procedures primarily depends on the oxidative degradation of chromogenic compounds within dental hard tissues, leading to improved tooth color. In-office bleaching techniques often incorporate various activation modes intended to enhance the efficacy of bleaching agents, accelerate treatment time, and improve clinical outcomes. These activation methods may include light-emitting diode (LED) systems, laser activation, or purely chemical activation without external energy sources. Despite their widespread use, the actual benefit of these activation modalities remains controversial, with conflicting evidence regarding their influence on bleaching effectiveness and associated adverse effects.
Interventions
OTHER35% Hydrogen Peroxide Bleaching Gel (Bleach 'n Smile®, Schutz Dental, Germany) with Laser Activation
Application of a 35% hydrogen peroxide bleaching agent (Bleach 'n Smile®) to the labial tooth surfaces, followed by activation using a dental laser according to the manufacturer's recommended parameters. The bleaching procedure is performed in a single clinical session under standardized conditions
OTHER35% Hydrogen Peroxide Bleaching Gel (Bleach 'n Smile®, Schutz Dental, Germany) with LED/Light Activation
Application of a 35% hydrogen peroxide bleaching agent (Bleach 'n Smile®) followed by activation using a dental light-curing unit or LED-based bleaching system, according to manufacturer instructions.
OTHER35% Hydrogen Peroxide Bleaching Gel (Bleach 'n Smile®, Schutz Dental, Germany) - Chemical Activation Only
Application of 35% hydrogen peroxide bleaching agent (Bleach 'n Smile®) without the use of external energy sources, allowing the material to act chemically according to manufacturer instructions.
Sponsors
Tanta University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
20 Years to 35 Years
Healthy volunteers
Yes
Inclusion criteria
* Adults aged 20-35 years * Individuals seeking esthetic improvement through tooth bleaching * Good general and oral health, with no active periodontal disease * Normal vital teeth (confirmed by clinical examination)
Exclusion criteria
* Teeth with caries, cracks, hypersensitivity, restorations, veneers, or crowns in the anterior region * Pregnant or lactating women * Smoking or use of tobacco products
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Color Change (ΔE) | Baseline (pre-bleaching), immediately post-bleaching, 1 month, and 3 months post-treatment | Assessment of tooth color change using a digital spectrophotometer (VITA Easyshade® V, Vita Zahnfabrik, Germany). Color measurements will be recorded in the CIE L\*a\*b\* color space, and the overall color difference (ΔE) will be calculated between baseline and subsequent time points. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Enamel Surface Roughness (Ra, µm) | Baseline and immediately after bleaching procedure | Evaluation of changes in enamel surface roughness following bleaching procedures. A profilometer used to record average surface roughness (Ra) values in micrometers (µm) |
| Tooth Sensitivity | Immediately after bleaching, 24 hours post-treatment, and up to 7 days post-treatment | Assessment of patient-reported tooth sensitivity associated with bleaching procedures. Visual Analog Scale (VAS) ranging from 0 (no sensitivity) to 10 (maximum unbearable sensitivity) |
| Patient Satisfaction | Immediately after treatment and at 3-month follow-up | Evaluation of patient satisfaction regarding esthetic outcomes and overall treatment experience. Validated questionnaire using a Likert scale (e.g., 1 = very dissatisfied to 5 = very satisfied), covering aspects such as perceived color improvement, comfort, and willingness to undergo the procedure again |
Countries
Egypt
Outcome results
None listed