title: Evaluation of the clinical and antimicrobial effects of the Er:YAG laser or topical gaseous ozone as adjuncts to initial periodontal therapy.
abstract: OBJECTIVE
  The aim of this study was to evaluate the clinical and microbiological results of treatment with the Er:YAG laser and topical gaseous ozone application as adjuncts to initial periodontal therapy in chronic periodontitis (CP) patients.
  
  
  BACKGROUND
  Although many studies have evaluated the effectiveness of the Er:YAG laser as an adjunct to initial periodontal therapy, few studies have focused on the use of gaseous ozone as an adjunct.
  
  
  METHODS
  Thirty patients with CP were randomly divided into three parallel groups, each composed of 10 individuals with at least four teeth having at least one approximal site with a probing depth (PD) of ≥5 mm and a sulcus bleeding index (SBI) ≥2 in each quadrant. Groups of patients received: (1) Scaling and root planing (SRP)+Er:YAG laser; (2) SRP+topical gaseous ozone; or (3) SRP alone. The microbiological and clinical parameters were monitored at day 0 and day 90.
  
  
  RESULTS
  At the end of the observation period, statistically significant improvements in clinical parameters were observed within each group. Parallel to the clinical changes, all treatments reduced the number of total bacteria and the proportion of obligately anaerobic microorganisms. Although intergroup comparisons of microbiological parameters showed no significant differences, clinical findings, including attachment gain and PD reduction, were found to be statistically significant in favor of the SRP+Er:YAG laser group.
  
  
  CONCLUSIONS
  Although statistically nonsignificant, the fact that the obligate anaerobic change was mostly observed in the SRP+Er:YAG laser group, and a similar decrease was noted in the SRP+topical gaseous ozone group, shows that ozone has an antimicrobial effect equivalent to that of the Er:YAG laser.
authors.affiliation: Faculty of Dentistry, Department of Periodontology, Yeditepe University, Istanbul, Turkey.
authors.forename: Selçuk
authors.initials: S
authors.lastname: Yılmaz
authors.forename: Serdar
authors.initials: S
authors.lastname: Algan
authors.forename: Hare
authors.initials: H
authors.lastname: Gursoy
authors.forename: Ulku
authors.initials: U
authors.lastname: Noyan
authors.forename: Bahar Eren
authors.initials: BE
authors.lastname: Kuru
authors.forename: Tanju
authors.initials: T
authors.lastname: Kadir
mesh_terms: D000328:Adult; D000368:Aged; D003131:Combined Modality Therapy; D012534:Dental Scaling; D005260:Female; D006801:Humans; D053844:Lasers, Solid-State; D028022:Low-Level Light Therapy; D008297:Male; D008875:Middle Aged; D010083:Oxidants, Photochemical / Q000627:therapeutic use*; D010126:Ozone / Q000627:therapeutic use*; D010510:Periodontal Diseases / Q000517:prevention & control / Q000628:therapy*; D010514:Periodontal Pocket
chemical_list: D010083:Oxidants, Photochemical; D010126:Ozone