Evaluation of Effect of Nd:YAG and Er:YAG Lasers on the Periodontal Pathogens: A Systematic Review

Introduction: By removing the periodontal pathogens and even the invasive bacteria attacking the tissues as well as the lack of normal periodontal treatment procedures, using a laser, as a complementary therapy, can have positive and useful impacts. The present study aims at investigating the impacts of Nd:YAG and Er:YAG laser on periodontal pathogens. Materials and Methods: In this systematic review, articles in the databases of Google Scholar, PubMed and Scopus were searched within 2000-2020. All information is classified into a table. Results: In searching the aforementioned databases and considering the given time interval, 78 articles were found in connection to the searched keywords and abstracts. Once the repeated titles and articles were deleted, 25 studies were selected which were decreased to 16 by the meticulous review by the assessment team. The full text of these 16 articles was reviewed. To make the final choice, 8 articles had the inclusion criteria which included the objectives of this study. Conclusion: To use the laser in treating the chronic periodontitis, an evidence-based study seems to be conducted. A few scientific pieces of evidence are indicating the advantage of a special laser wavelength in the common treatments.Based on most researches reviewed in this study, the results of the complementary application of Nd:YAG and Er:YAG lasers in treating the chronic periodontitis are the better than the ones obtained from the normal teeth scaling and planning the teeth root surface in terms of the reduced probing depth and subgingival bacteria population. The decision was made to use the laser in periodontal surgery based on the advantages such as hemostasis and less pain after the treatment. However, more studies are needed to apply the laser in periodontal treatments.