title: Er:YAG laser treatment in supportive periodontal therapy.
abstract: OBJECTIVE
  To assess clinical and microbiological outcomes of an Er:YAG laser in comparison with sonic debridement in the treatment of persistent periodontal pockets in a prospective randomized controlled multicentre study design.
  
  
  METHODS
  A total of 78 patients in supportive periodontal therapy with two residual pockets were included, 58 were available for the whole follow-up period. Root surfaces were instrumented either with a sonic scaler (Sonicflex(®) 2003 L) or with an Er:YAG laser (KEY Laser(®) 3). Clinical attachment levels (CAL), Probing depths (PD), Plaque control record (PCR) and Bleeding on probing (BOP) were assessed at baseline, 13 and 26 weeks after treatment. In addition, microbiological analysis was performed employing a DNA diagnostic test kit (micro-IDent(®) Plus).
  
  
  RESULTS
  Probing depths and CAL were significantly reduced in both groups over time (p < 0.05), without significant differences between the groups (p > 0.05). BOP frequency values decreased significantly within both groups (p < 0.05), with no difference between the laser and the sonic treatment (p > 0.05). PCR frequency values did not change during the observation period (p > 0.05). Microbiological analysis failed to expose any significant difference based on treatment group or period.
  
  
  CONCLUSIONS
  Employing both sonic and laser treatment procedures during supportive periodontal care, similar clinical and microbiological outcomes can be expected.
authors.affiliation: Department of Operative Dentistry and Periodontology, University School of Dentistry, Freiburg, Germany.
authors.forename: Petra
authors.initials: P
authors.lastname: Ratka-Krüger
authors.forename: Dominik
authors.initials: D
authors.lastname: Mahl
authors.forename: Daniela
authors.initials: D
authors.lastname: Deimling
authors.forename: Jürgen Schulte
authors.initials: JS
authors.lastname: Mönting
authors.forename: Ingeborg
authors.initials: I
authors.lastname: Jachmann
authors.forename: Elyan
authors.initials: E
authors.lastname: Al-Machot
authors.forename: Anton
authors.initials: A
authors.lastname: Sculean
authors.forename: Mohammad
authors.initials: M
authors.lastname: Berakdar
authors.forename: Pia-Merete
authors.initials: PM
authors.lastname: Jervøe-Storm
authors.forename: Andreas
authors.initials: A
authors.lastname: Braun
mesh_terms: D058491:Bacterial Load / Q000528:radiation effects; D055113:Chronic Periodontitis / Q000382:microbiology / Q000532:radiotherapy / Q000628:therapy; D003773:Dental Plaque / Q000382:microbiology / Q000517:prevention & control; D005260:Female; D005500:Follow-Up Studies; D005884:Gingival Hemorrhage / Q000145:classification / Q000382:microbiology; D006090:Gram-Negative Bacteria / Q000145:classification / Q000528:radiation effects; D019220:High-Energy Shock Waves / Q000627:therapeutic use; D006801:Humans; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D028022:Low-Level Light Therapy / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D017622:Periodontal Attachment Loss / Q000382:microbiology / Q000532:radiotherapy / Q000628:therapy; D057747:Periodontal Debridement / Q000295:instrumentation / Q000379:methods*; D010514:Periodontal Pocket / Q000382:microbiology / Q000532:radiotherapy* / Q000628:therapy; D011446:Prospective Studies; D013010:Sonication / Q000295:instrumentation; D014092:Tooth Root / Q000382:microbiology / Q000473:pathology / Q000528:radiation effects; D016896:Treatment Outcome