Purpose: Implant surface decontamination is one of the main goals in the treatment of peri-implantitis. The purpose of the study was to demonstrate possible alterations of different implant surfaces after laser irradiation using the CO2- and Nd:YAG lasers.
Materials and Methods: Three different types of titanium implants (sandblasted, plasma sprayed, HA-coated) were exposed to different laser types (CO2 and Nd:YAG) at different power settings (2.0, 4.0, and 6.0 W). The CO2 laser was applied in the pulsed or continuous mode; the Nd:YAG laser was used in the pulsed mode. SEM was used to examine the laser-treated surfaces.
Results: The SEM examination showed that the pulsed or continuous mode of the noncontact CO2 laser with power settings between 2.0 and 6.0 W did not modify the implant surface, regardless of implant type. The contact pulsed Nd:YAG-laser produced extensive alterations and melting of the implant surface in all types of implants using low or high power settings (2. 0 to 6.0 W).
Conclusion: The pulsed Nd:YAG laser should be avoided for clinical use in the peri-implant tissues because of the damage and modification of the retentive implant surface. In contrast, the CO2 laser could not modify the implant surface at the power settings used here and may be applied in cases of peri-implant pathology without limitations.