Mohammad Asnaashari1, Mostafa Godiny2, Saranaz Azari-Marhabi3, Fahimeh Sadat Tabatabaei4, Maryam Barati5. 1. Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. 2. Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran. 3. Department of Oral and Maxillofacial Medicine, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. 4. Department of Dental Materials, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran. 5. Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Abstract
INTRODUCTION: The aim of this study was to compare the antibacterial efficacy of diode laser 810nm and photodynamic therapy (PDT) in reducing bacterial microflora in endodontic retreatment of teeth with periradicular lesion. METHODS: In this in vivo clinical trial, 20 patients who needed endodontic retreatment were selected. After conventional chemo mechanical preparation of root canals, microbiological samples were taken with sterile paper point (PP), held in thioglycollate broth, and then were transferred to the microbiological lab. In the first group, PDT with methylene blue (MB) and diode laser (810 nm, 0.2 W, 40 seconds) was performed and in the second group diode laser (810 nm, 1.2 W, 30 seconds) was irradiated. Then second samples were taken from all canals. RESULTS: CFU/ml amounts showed statistically significant reduction in both groups (P < 0.001). CFU/ml amounts were compared between the two groups and there was no statistical difference. CONCLUSION: PDT and diode laser 810 nm irradiation are effective methods for root canal disinfection. PDT is a suitable alternative for diode laser 810 nm irradiation, because of lower thermal risk on root dentin.
INTRODUCTION: The aim of this study was to compare the antibacterial efficacy of diode laser 810nm and photodynamic therapy (PDT) in reducing bacterial microflora in endodontic retreatment of teeth with periradicular lesion. METHODS: In this in vivo clinical trial, 20 patients who needed endodontic retreatment were selected. After conventional chemo mechanical preparation of root canals, microbiological samples were taken with sterile paper point (PP), held in thioglycollate broth, and then were transferred to the microbiological lab. In the first group, PDT with methylene blue (MB) and diode laser (810 nm, 0.2 W, 40 seconds) was performed and in the second group diode laser (810 nm, 1.2 W, 30 seconds) was irradiated. Then second samples were taken from all canals. RESULTS: CFU/ml amounts showed statistically significant reduction in both groups (P < 0.001). CFU/ml amounts were compared between the two groups and there was no statistical difference. CONCLUSION: PDT and diode laser 810 nm irradiation are effective methods for root canal disinfection. PDT is a suitable alternative for diode laser 810 nm irradiation, because of lower thermal risk on root dentin.
Authors: Mohammad Asnaashari; Mohammad Jafar Eghbal; Amirali Sahba Yaghmayi; Mehdi Shokri; Saranaz Azari-Marhabi Journal: J Lasers Med Sci Date: 2019-12-01
Authors: Eleftherios Terry R Farmakis; Franziska Beer; Ioannis Tzoutzas; Christoph Kurzmann; Hassan Ali Shokoohi-Tabrizi; Nikos Pantazis; Andreas Moritz Journal: Materials (Basel) Date: 2022-03-30 Impact factor: 3.623