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Er,Cr:YSGG Laser Bleaching on Tooth Color and Sensitivity

NCT06666920 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2024-10-31

No results posted yet for this study

Summary

The aim of this split-mouth clinical study was to evaluate the tooth color (ΔΕab and ΔΕ00) and whiteness (ΔWID) changes, as well as tooth sensitivity (TS) induced after performing in-office tooth bleaching procedure with or without light-activation of the bleaching gel using Er,Cr:YSGG laser irradiation. Twenty patients with tooth shade A3 or darker were selected for this single-blinded, split-mouth study. The bleaching session was conducted with two 20-min sessions of a 40% hydrogen peroxide bleaching agent assisted by Er,Cr:YSGG laser (2780 nm) irradiation on one side (left) of the maxillary and mandibular teeth and without laser activation on the other hemiarch (right). ΔΕab, ΔΕ00 and ΔWID were evaluated in central incisors and canines using a clinical spectrophotometer immediately, 1 week and 1 month after the bleaching procedure. TS was evaluated pre-operatively and immediately post-operatively using a visual analogue scale (VAS).

Conditions

  • Tooth Discoloration
  • Tooth Sensitivity

Interventions

RADIATION

laser irradiation

Immediately after applying the bleaching agent, the gel on the left upper and lower hemiarches (teeth 21-25 and 31-35) was irradiated using an Er,Cr:YSGG laser (2780 nm). Specifically, an Er,Cr:YSGG solid-state laser device (Waterlase MD Turbo, BIOLASE, Irvine, CA, USA) equipped with a Z-type glass tip (MZ8) measuring 800 μm in diameter and 6 mm in length was used. This tip was attached to the laser system's gold handpiece. The laser parameters for the treatment included an average output power of 1.25 W, a pulse duration of 700 μs (S-mode), and a pulse repetition rate of 10 Hz, without water or air flow, according to a previous study. Each tooth received two 15-s irradiation intervals, one for each 20-min session (totaling 30 s), while maintaining the laser handpiece approximately 2.5 cm from the tooth surface, perpendicular to the enamel. The gel was irradiated using a scanning mode, with the handpiece moved slowly in both horizontal and vertical directions at a speed of 2 mm/s.

Sponsors & Collaborators

  • Aristotle University Of Thessaloniki

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
50 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2018-10-01
Primary Completion
2022-07-01
Completion
2022-10-01

Countries

  • Greece

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 NCT06666920 on ClinicalTrials.gov