A Comparative Evaluation of Laser-Assisted In-Office Tooth Bleaching Using two different Wavelengths: Effects on Tooth Sensitivity and Color Change

A Comparative Evaluation of Laser-Assisted In-Office Tooth Bleaching Using 976 nm and 450 nm Wavelengths: Effects on Tooth Sensitivity and Color Change

Status

Recruiting

Phases

Phase 4

Study type

Interventional

Source

IRCT

Registry ID

IRCT20230923059490N2

Enrollment

Registered

2026-05-13

Start date

2026-05-22

Completion date

Unknown

Last updated

2026-06-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Tooth color. tooth

Interventions

Intervention 1: Intervention group: One session of laser bleaching using 35% hydrogen peroxide gel (Nova Teb Iran), activated with a 450 nm diode laser (Woodpecker, China). The procedure is performed

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Adult individuals applying for tooth bleaching treatment, aged 18 years and above Presence of natural teeth in the treatment area (no active caries or severe periodontal disease) No persistent tooth sensitivity or history of pulpal complications Informed consent to participate in the study

Exclusion criteria

Exclusion criteria: Pregnancy or breastfeeding Uncontrolled serious systemic diseases Previous endodontic treatment in the target teeth Hypersensitivity to bleaching gel components

Design outcomes

Primary

Measure	Time frame
Tooth color measured by Vita shade guide. Timepoint: before and immediately after tooh bleaching. Method of measurement: using Vita shade guide.;Tooth sensitivity. Timepoint: before, immediately and 24, 48 h post laser tooth bleavhing. Method of measurement: using 0-10 Visual Analouge Scale (VAS).	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactNeda Hakimiha

Shahid Beheshti University of Medical Sciences

ned.hakimiha@gmail.com0982122749221

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Jun 11, 2026