title: Microbiological effect of the use of an ultrasonic device and iodine irrigation in patients with severe chronic periodontal disease: a randomized controlled clinical study.
abstract: OBJECTIVE
  Instrumentation of the subgingival area is aimed at removing as much as possible of the bacterial biofilm and subgingival calculus. Since mechanical root debridement is a technically demanding procedure, antiseptics and antibiotics delivered either locally or systemically have been used as adjunct to scaling and root-planning procedures in order to control the subgingival biofilm and thereby enhance the treatment outcome. Our aim was to study the microbiological effect of ultrasonic debridement with or without povidone-iodine (PVP-iodine) in the treatment of severe chronic periodontitis.
  
  
  METHODS
  Twenty patients were recruited to the study. Each test site and the related quadrant were randomly assigned to one of four different treatment modalities: ultrasonic scaling+subgingival irrigation with 0.5% PVP-iodine for 5 min/tooth, ultrasonic scaling+subgingival irrigation with sterile saline solution for 5 min/tooth, subgingival irrigation with sterile saline solution for 5 min/tooth and subgingival irrigation with 0.5% PVP-iodine for 5 min/tooth. The individuals were followed longitudinally for 6 months.
  
  
  RESULTS
  The present study showed that non-surgical periodontal therapy with the use of an ultrasonic device was effective in reducing the analyzed putative periodontal bacteria. No statistically significant difference between ultrasonic+saline and ultrasonic+PVP-iodine was found.
  
  
  CONCLUSIONS
  Ultrasonic debridement reduced the periodontal markers in patients with severe chronic periodontitis. The reduction was selective. A concentration of 0.5% PVP-iodine did not add any anti-microbiological effect compared to ultrasonic debridement alone.
authors.affiliation: Department of Periodontology, Specialist Dental Clinic, Mölndal Hospital, Mölndal, Sweden. asa.leonhardt@vgregion.se
authors.forename: Asa
authors.initials: A
authors.lastname: Leonhardt
authors.forename: Christina
authors.initials: C
authors.lastname: Bergström
authors.forename: Lena
authors.initials: L
authors.lastname: Krok
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Cardaropoli
mesh_terms: D000328:Adult; D000368:Aged; D000891:Anti-Infective Agents, Local / Q000627:therapeutic use*; D002908:Chronic Disease; D015342:DNA Probes / Q000032:analysis; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007455:Iodine / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D010510:Periodontal Diseases / Q000382:microbiology / Q000628:therapy*; D010514:Periodontal Pocket / Q000382:microbiology / Q000628:therapy; D007507:Therapeutic Irrigation / Q000379:methods; D014464:Ultrasonic Therapy / Q000379:methods*
chemical_list: D000891:Anti-Infective Agents, Local; D015342:DNA Probes; D007455:Iodine