Ceramic bracket debonding by Tm:YAP laser irradiation.
Tatjana Dostalova1, Helena Jelinkova, Jan Sulc
1Charles University, Department of Paediatric Stomatology, Prague, Czech Republic. tatjana.dostalova@fnmotol.cz
Photomedicine and Laser Surgery
|February 22, 2011
Summary
A Thulium:Ytterbium-Aluminium-Perovskite (Tm:YAP) laser offers a safe and effective method for ceramic bracket debonding. This laser system minimizes enamel damage and pulp temperature rise, making it a promising tool for dental practices.
Area of Science:
- Dental materials science
- Laser dentistry
- Orthodontic technology
Background:
- Ceramic bracket debonding relies on weakening the adhesive resin.
- Laser irradiation presents a promising approach for safe and efficient adhesive resin removal.
Purpose of the Study:
- To develop a simple, reliable method for ceramic bracket debonding.
- To ensure minimal enamel alteration and acceptable pulp temperature rise during debonding.
Main Methods:
- Utilized a diode-pumped Thulium:Ytterbium-Aluminium-Perovskite (Tm:YAP) microchip laser (1998 nm wavelength).
- Tested two power settings (1-2 W) with a 3 mm spot size, focused by a lens.
- Investigated enamel loss, residual resin, and intra-tooth temperature changes.
Main Results:
- 1W laser irradiation for 60 seconds caused a 3-4°C pulp temperature rise.
- This setting proved suitable for debonding with minimal enamel damage compared to conventional methods.
- Scanning Electron Microscopy (SEM) confirmed slight enamel damage.
Conclusions:
- A Tm:YAP laser (1W, 1998 nm, 60s) is an efficient tool for ceramic bracket debonding.
- The laser system is compact and suitable for dental practice use.
- Moderate cooling alongside laser use is recommended for optimal results.