title: Stability of dental implants after irradiation with an 830-nm low-level laser: a double-blind randomized clinical study.
abstract: Little is known about the benefits of low-level laser therapy (LLLT) on improvement of stability of dental implants. The aim of this randomized clinical study was to assess the LLLT effect on implants stability by means of resonance frequency analysis (RFA). Thirty implants were distributed bilaterally in the posterior mandible of eight patients. At the experimental side, the implants were submitted to LLLT (830 nm, 86 mW, 92.1 J/cm(2), 0.25 J, 3 s/point, at 20 points), and on the control side, the irradiation was simulated (placebo). The first irradiation was performed in the immediate postoperative period, and it was repeated every 48 h in the first 14 days. The initial implant stability quotient (ISQ) of the implants was measured by means of RFA. New ISQ measurements were made after 10 days, 3, 6, 9, and 12 weeks. The initial ISQ values ranged from 65-84, with a mean of 76, undergoing a significant drop in stability from the 10th day to the 6th week in the irradiated group, and presenting a gradual increase from the 6th to the 12th week. The highest ISQ values were observed on the 10th day in the irradiated group, and the lowest in the 6th week in both groups. Under the conditions of this study, no evidence was found of any effect of LLLT on the stability of the implants when measured by RFA. Since high primary stability and good bone quality are of major relevancy for a rigid bone-implant interface, additional LLLT may have little impact macroscopically.
authors: FUNDECTO, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil. joellemg@gmail.com
authors: Joelle Marie
authors: JM
authors: García-Morales
authors: Pedro
authors: P
authors: Tortamano-Neto
authors: Francisco Fernando
authors: FF
authors: Todescan
authors: José Carlos Silva
authors: JC
authors: de Andrade
authors: Juliana
authors: J
authors: Marotti
authors: Denise Maria
authors: DM
authors: Zezell
mesh_terms: D000328:Adult; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D003799:Dental Stress Analysis; D003781:Denture Retention; D004311:Double-Blind Method; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D057194:Intention to Treat Analysis; D028022:Low-Level Light Therapy / Q000379:methods*; D008297:Male; D008334:Mandible / Q000601:surgery*; D008422:Materials Testing; D008875:Middle Aged; D016348:Osseointegration; D055815:Young Adult
chemical_list: D015921:Dental Implants