[en] Peri-implantitis (PI) is an inflammatory disease of peri-implant tissues, it represents the most frequent complication of dental implants. Evidence revealed that microorganisms play the chief role in causing PI. The purpose of our study is to evaluate the cleaning of contaminated dental implant surfaces by means of the Q-switch Nd:YAG (Neodymium-doped Yttrium Aluminum Garnet) laser and an increase in temperature at lased implant surfaces during the cleaning process. Seventy-eight implants (titanium grade 4) were used (Euroteknika, Sallanches, France). Thirty-six sterile implants and forty-two contaminated implants were collected from failed clinical implants for different reasons, independent from the study. Thirty-six contaminated implants were partially irradiated by Q-switch Nd:YAG laser (1064 nm). Six other contaminated implants were used for temperature rise evaluation. All laser irradiations were calibrated by means of a powermetter in order to evaluate the effective delivered energy. The irradiation conditions delivered per pulse on the target were effectively: energy density per pulse of 0.597 J/cm2, pick powers density of 56 mW/cm2, 270 mW per pulse with a spot diameter of 2.4 mm, and with repetition rate of 10 Hz for pulse duration of 6 ns. Irradiation was performed during a total time of 2 s in a non-contact mode at a distance of 0.5 mm from implant surfaces. The parameters were chosen according to the results of a theoretical modeling calculation of the Nd:YAG laser fluency on implant surface. Evaluation of contaminants removal showed that the cleaning of the irradiated implant surfaces was statistically similar to those of sterile implants (p-value ≤ 0.05). SEM analysis confirmed that our parameters did not alter the lased surfaces. The increase in temperature generated at lased implant surfaces during cleaning was below 1 °C. According to our findings, Q-switch Nd:YAG laser with short pulse duration in nanoseconds is able to significantly clean contaminated implant surfaces. Irradiation parameters used in our study can be considered safe for periodontal tissue.
Research center :
d‐BRU - Dental Biomaterials Research Unit - ULiège [BE]
Disciplines :
Dentistry & oral medicine
Author, co-author :
Namour, Mélanie ; Université de Liège - ULiège > Dental biomaterials research unit (d-BRU)
El Mobadder, Marwan; Department of Dental Science, Faculty of Medicine, University of Liege, 4000 Liege, Belgium
Magnin, Delphine; Bio- and Soft Matter Division, Institute of Condensed and Nanosciences, Université Catholique de Louvain (UCL), 1348-Louvain-la-Neuve, Belgium
Peremans, André; Laboratoire Physique de la Matière et du Rayonnement (P.M.R.), Université de Namur, 5000 Namur, Belgium
Verspecht, Tim; Department of Oral Health Sciences, University of Leuven (K.U. Leuven), 3000 Leuven, Belgium
Teughels, Wim; Department of Oral Health Sciences, University of Leuven (K.U. Leuven) and Dentistry, University Hospitals Leuven, 3000 Leuven, Belgium
Lamard, Laurent; Laserspec Center, 5000 Namur, Belgium
Namour, Samir ; Université de Liège - ULiège > Département des sciences dentaires
Rompen, Eric ; Université de Liège - ULiège > Département des sciences dentaires > Chirurgie bucco-dentaire et parodontologie
Language :
English
Title :
Q-Switch Nd:YAG Laser-Assisted Decontamination of Implant Surface.
Publication date :
01 October 2019
Journal title :
Dentistry Journal
ISSN :
2304-6767
Publisher :
MDPI Multidisciplinary Digital Publishing Institute, Switzerland
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