title: Nonsurgical treatment of peri-implantitis using an air-abrasive device or mechanical debridement and local application of chlorhexidine. Twelve-month follow-up of a prospective, randomized, controlled clinical study.
abstract: OBJECTIVE
  The purpose of this prospective, parallel group-designed, randomized controlled clinical study was the evaluation of the effectiveness of an air-abrasive device (AAD) for nonsurgical treatment of peri-implantitis.
  
  
  METHODS
  Twenty five patients, showing at least one implant with initial to moderate peri-implantitis, underwent an oral hygiene programme and were randomly treated using either (1) AAD (amino acid glycine powder) or (2) mechanical debridement using carbon curettes and antiseptic therapy with chlorhexidine digluconate (mechanical debridement (MDA)). Clinical parameters were measured at baseline and 12 months after treatment (e.g. bleeding on probing (BOP), probing depth (PD), clinical attachment level (CAL)).
  
  
  RESULTS
  At 12 months, the AAD group revealed significantly higher (p < 0.05; unpaired t test) decrease in mean BOP scores when compared with MDA-treated sites (41.2 ± 29.5 vs. 16.6 ± 33.4%). Both groups exhibited comparable PD reductions (AAD = 0.5 ± 0.9 mm vs. MDA = 0.4 ± 0.9 mm) and CAL gains (AAD = 0.6 ± 1.3 mm vs. MDA = 0.5 ± 1.1 mm) (p > 0.05; Mann-Whitney test, respectively).
  
  
  CONCLUSIONS
  Within its limitations, the present study has indicated that both treatment procedures resulted in comparable but limited CAL gains at 12 months. Furthermore, it could be detected that AAD was associated with significantly higher BOP decrease than MDA.
  
  
  CONCLUSIONS
  The present results have indicated that nonsurgical therapy of peri-implantitis using both AAD and MDA resulted in comparable PD reductions and CAL gains after 12 months of healing. The BOP reductions were significantly higher in the AAD in comparison to the MDA group. So, AAD may be more effective for nonsurgical therapy of peri-implantitis than MDA.
authors.affiliation: Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany. gordon.john@med.uni-duesseldorf.de.
authors.forename: Gordon
authors.initials: G
authors.lastname: John
authors.affiliation: Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany.
authors.forename: Narja
authors.initials: N
authors.lastname: Sahm
authors.affiliation: Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Becker
authors.affiliation: Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Schwarz
mesh_terms: D000359:Aftercare; D000368:Aged; D002710:Chlorhexidine / Q000008:administration & dosage*; D006801:Humans; D008875:Middle Aged; D057873:Peri-Implantitis / Q000628:therapy*; D057747:Periodontal Debridement / Q000379:methods*; D011446:Prospective Studies
chemical_list: D002710:Chlorhexidine
keywords: Air-abrasive device; Air-powder flow; Amino acid glycine powder; Nonsurgical; Peri-implantitis; Plastic curettes