Effect of Chemical and Light Bleaching Techniques on Color Change, Dentin Hypersensitivity and Pa… (NCT07669324) | Clinical Trial Compass
CompletedNot Applicable
Effect of Chemical and Light Bleaching Techniques on Color Change, Dentin Hypersensitivity and Patient Satisfaction
Egypt30 participantsStarted 2025-02-15
Plain-language summary
Aim of The Study This study aims is to evaluate color change, dentin hypersensitivity and patient satisfaction after different bleaching techniques at different time intervals.
Materials(subjects)\& Methods
* Chemically activated bleaching kit.
* Light activated bleaching kit. This will be a randomized single-blind clinical trial, patients attending the faculty. Thirty-two patients will be selected for the study. Oral hygiene steps will be taken at the first visit, as well as scaling and polishing of the teeth. Patients will be divided into two groups according to the bleaching technique used. Group 1: chemical bleaching, Group 2: light activated bleaching.
Color change measurements:
Tooth color measurements will be performed at baseline T0, immediately after bleaching treatment T1, 1-week T2 and 1-month T3 after bleaching using a spectrophotometer. The whiteness index will be also calculated to verify the perceived bleaching effect.
Dentin hypersensitivity will be evaluated at baseline D0, immediately after bleaching treatment D1, 1 week (D2) and 3 month (D3) after bleaching using Visual Analogue Scale VAS numbered from 0 (no pain) to 10 (maximum extreme pain).
At the end of the study (3 months) a questionnaire was given to the patients to assess their satisfaction with bleaching treatment.
Who can participate
Age range
18 Years – 45 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Presence of six sound maxillary anterior teeth.
* Patient having brown or yellowish stains.
* Good oral health maintained by routine brushing.
* Generalized tooth staining ranging from A2 or darker according to the value-oriented shade guide (Vita easy shade).
* Patient is willing to sign a consent form and can attend all recall visits.
Exclusion Criteria:
* Existing anterior crowns or any restorations on anterior teeth that will interfere with the bleaching process.
* Smoker or alcoholic patient.
* Patients suffering from active periodontal diseases and exposed roots.
* Patient who undergone previous whitening procedure.
* Pregnant and lactating women.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.