title: Clinical comparison of the effectiveness of novel sonic instruments and curettes for periodontal debridement after 2 months.
abstract: OBJECTIVE
  The aim of this study was to evaluate in vivo the effectiveness of scaling and root planing of new oscillating instruments (Periosonic) using a sonic handpiece compared to hand curettes with a split mouth design after 2 months.
  
  
  METHODS
  11 patients with adult periodontitis participated in this study. Plaque index (PII) (O'Leary), bleeding on probing (BOP), probing pocket depth (PPD), recession (REC) and clinical attachment level (CAL) were recorded at baseline and 2 months after treatment. After oral hygiene instruction, 2 randomly assigned quadrants per patient were scaled and root planed with curettes (control side) and the remaining 2 quadrants with the Periosonic instruments 1 and 2 (test side). The student t-test for paired data was used to test the significance of difference between test and control sides.
  
  
  RESULTS
  There was no statistical difference (p>0.05) between the 2 sides for the improvement of the clinical parameters excepted for the group with initial PPD of 4-6 mm (test: 1.3+/-0.4 mm PPD reduction, control: 1.6+/-0.4 mm). For PPD > or =7 mm, the test side had better clinical improvement in attachment levels (2.2+/-0.9 mm), less recession (-0.4+/-0.5 mm) with lower PPD reduction (2.4+/-0.6 mm) than the control side (AL: 1.6+/-1.8 mm; REC: -1.3+/-0.7 mm, PPD reduction: 3.0+/-1.4 mm).
  
  
  CONCLUSIONS
  This clinical study demonstrated that Periosonic(R) instruments are clinically at least as effective as curettes in PPD reduction when initial PPD is < or =6 mm and show better clinical attachment level improvement with less recession for initial PPD of > or =7 mm.
authors.affiliation: Department of Preventive Dentistry, Periodontology and Cariology, Division of Periodontology, University of Zurich, Switzerland. beuchat@zzmk.unizh.ch
authors.forename: M
authors.initials: M
authors.lastname: Beuchat
authors.forename: A
authors.initials: A
authors.lastname: Busslinger
authors.forename: P R
authors.initials: PR
authors.lastname: Schmidlin
authors.forename: B
authors.initials: B
authors.lastname: Michel
authors.forename: B
authors.initials: B
authors.lastname: Lehmann
authors.forename: F
authors.initials: F
authors.lastname: Lutz
mesh_terms: D000328:Adult; D000368:Aged; D003754:Dental High-Speed Equipment; D003762:Dental Instruments; D003774:Dental Plaque Index; D012534:Dental Scaling / Q000295:instrumentation*; D006801:Humans; D008875:Middle Aged; D017060:Patient Satisfaction; D010512:Periodontal Index; D010518:Periodontitis / Q000628:therapy*; D016745:Root Planing / Q000295:instrumentation; D013010:Sonication; D013357:Subgingival Curettage / Q000295:instrumentation; D016896:Treatment Outcome