Evaluation of air polishing with a sterile powder and mechanical debridement during regenerative surgical periimplantiti
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ORIGINAL ARTICLE
Evaluation of air polishing with a sterile powder and mechanical debridement during regenerative surgical periimplantitis treatment: a study in dogs Alex Solderer 1 & Benjamin E. Pippenger 2 & Marcel Donnet 3 & Daniel Wiedemeier 4 & Liza L. Ramenzoni 1 & Patrick R. Schmidlin 1 Received: 19 February 2020 / Accepted: 3 September 2020 # The Author(s) 2020
Abstract Objectives To evaluate the effectiveness of mechanical debridement and/or air polishing on the healing of ligature-induced buccal periimplantitis dehiscence defects in dogs. Material and methods Forty-eight implants were placed in the mandibles of twelve beagle dogs, and periimplantitis was induced for 2 months using ligatures. The resulting buccal dehiscence-type defects were surgically cleaned and augmented (xenogenic filler and resorbable membrane) according to one of the following treatments: (1) Cleaning with carbon curette (debridement - D) and guided bone regeneration (GBR/G): DG, (2) air polishing cleaning (A) and GBR: AG, (3) a combination of D/A/G: DAG, and (4) D/A without GBR: DA. After 2 months, histomorphometric and inflammatory evaluations were conducted. Results The median bone gain after therapy ranged between 1.2 mm (DG) and 2.7 mm (AG). Relative bone gain was between 39% (DG) and 59% (AG). The lowest inflammation scores were obtained in DA without GBR (5.84), whereas significantly higher values between 8.2 and 9.4 were found in the groups with augmentation. At lingual sites without defects, scores ranged from 4.1 to 5.9. According to ISO, differences above 2.9 were considered representative for irritative properties. Conclusions All treatments resulted in partial regeneration of the defects. No treatment group showed a significantly (p < 0.05) better outcome. However, pretreatment with air polishing showed a tendency for less inflammation. Noteworthy, inflammation assessment showed an overall irritative potential after GBR in the evaluated early healing phase. Clinical relevance Periimplantitis treatment still represents a big issue in daily practice and requires additional preclinical research in order to improve treatment concepts. Keywords Dental implants . Periimplantitis . Guided bone regeneration . Air polishing . Dehiscence defect
Introduction * Patrick R. Schmidlin [email protected] 1
Clinic of Conservative and Preventive Dentistry, Division of Periodontology and Peri-implant Diseases, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland
2
Preclinical & Translational Research Group, Straumann AG, Basel, Switzerland
3
EMS, Nyon, Switzerland
4
Statistical Services, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
The use of implants in dental practice has become a routine procedure in order to replace one or more missing teeth using either fixed or removable dentures. High success rates of up to 97% after 10 [1] and 75% over 20 years [2] underline the excellent applicability of this treatment. However, prosthetic and biological complicat
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