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Effect of Chemical and Light Bleaching Techniques on Color Change, Dentin Hypersensitivity and Patient Satisfaction

NCT07669324 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2026-06-25

No results posted yet for this study

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.

Conditions

  • Dentin Hypersensitivity

Interventions

OTHER

Light activated bleaching

bleaching procedure was conducted according to the manufacturer's instructions. Retractor was set in place, the teeth were dried by air stream, the lips were lubricated with Vaseline, a cheek retractor was placed, and isolation was achieved using cotton rolls and the gingival soft tissues were isolated by protective Liquidam (Philips, Andover, MA), Labial surfaces of the teeth 11, 12, 21, 22 were then covered with whitening gel in about 1-2mm thick layer. one 20 min session was done.protective eye wear for both patient and operator was used,d, the bleaching gel was applied, and agitated, and then light activation was used for the period of the session.

OTHER

Chemically activated bleaching

The bleaching procedure was conducted according to the manufacturer's instructions. Retractor was set in place, the teeth were dried by air stream, the lips were lubricated with Vaseline, a cheek retractor was placed, and isolation was achieved using cotton rolls and the gingival soft tissues were isolated by protective Liquidam (Philips, Andover, MA), Labial surfaces of the teeth 11, 12, 21, 22 were then covered with whitening gel in about 1-2mm thick layer. one 20 min session was done.the bleaching gel was applied and agitated and then left on tooth surface for the period of the session

Sponsors & Collaborators

  • Nahda University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
SCREENING
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
45 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-02-15
Primary Completion
2025-04-22
Completion
2025-05-13

Countries

  • Egypt

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07669324 on ClinicalTrials.gov