ABSTRACT
Introduction: This study aimed to assess the Scanning Electron Microscope [SEM] analysis of tooth surface irradiated by erbium:yttrium-aluminum-garnet [EnYAG] laser with various parameters
Methods: Number of 25 extracted human third molars free of caries were used in this study.
The teeth were put into 5 groups for laser irradiation as follows: group 1 [power: 0.5 W, Energy: 50 mj]; group 2 [power: 1 W, Energy: 100 mj]; group 3 [power: 1.5 W, Energy: 150 mj]; group 4 [power: 2 W, Energy: 200 mj]; group 5 [power: 2.5 W, Energy: 250 mj]. All samples were prepared by repetition rate of 10 Hz and duration of 230 us, using a non-contact handpiece at a distance of 4 mm. Then, the samples were prepared for SEM examination
Results: SEM evaluation of every 25 samples, treated by EnYAG, showed that all groups had exposed dentinal tubules without any melted area or cracks
Conclusion: In this study we used SEM to investigate ablated dentine with different parameters of EnYAG laser energy. Our findings support these conclusions. All powers of laser below 3 W are proper for ablation, and make no cracks
Subject(s)
Humans , Electron Microscope Tomography , Tooth , DentinABSTRACT
Peri-implantitis is a state defined as an inflammatory reaction around osseointegrated implants, leading to progressive loss of supporting bone. Various treatment methods are suggested in the treatment of peri-implantitis and clinicians have to choose a method over a large number of treatment protocols. Lasers have shown promising therapeutic effect in treatment of peri-implantitis. However, some controversies have been found in clinical outcomes after using lasers. Therefore, we aimed to review the current literature over the past ten years for the use of lasers in treatment of peri-implantitis, via the Pubmed electronic database of the US National Library of Medicine. Fifteen human studies were reviewed. Er:YAG [Erbium-Doped Yttrium Aluminum Garnet], CO2[Carbon Dioxide Laser] and Diode lasers were used. Despite inconsistencies and disharmonies among studies in terms of study design, positive treatment outcomes were obvious among the majority of them. However, short period of follow-ups and poor control of plaque index, as a critical confounding factor, were the major problems which these studies suffered from. It seems that one session laser therapy is not adequate for achieving optimal clinical outcome. Further studies with longer periods of follow-ups, intense control of plaque index, and various sessions of laser treatments are needed to clearly illustrate the clinical privilege of laser therapy