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Comparison of naturally occurring and ligature‐induced peri‐implantitis bone defects in humans and dogs
Author(s) -
Schwarz Frank,
Herten Monika,
Sager Martin,
Bieling Katrin,
Sculean Anton,
Becker Jürgen
Publication year - 2007
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2006.01320.x
Subject(s) - ligature , peri implantitis , beagle , implant , dentistry , medicine , peri , surgery
Objectives: The aim of the present study was to evaluate and compare naturally occuring and ligature‐induced peri‐implantitis bone defects in humans and dogs. Material and Methods: Twenty‐four partially and fully edentulous patients undergoing peri‐implant bone augmentation procedures due to advanced peri‐implant infections were included in this study ( n =40 implants). Furthermore, peri‐implantitis was induced by ligature placement and plaque accumulation in five beagle dogs for three months following implant insertion ( n =15 implants). The ligatures were removed when about 30% of the initial bone was lost. During open flap surgery, configuration and defect characteristics of the peri‐implant bone loss were recorded in both humans and dogs. Results: Open flap surgery generally revealed two different classes of peri‐implant bone defects. While Class I defects featured well‐defined intrabony components, Class II defects were characterized by consistent horizontal bone loss. The allocation of intrabony components of Class I defects regarding the implant body allowed a subdivision of five different configurations (Classes Ia–e). In particular, human defects were most frequently Class Ie (55.3%), followed by Ib (15.8%), Ic (13.3%), Id (10.2%), and Ia (5.4%). Similarly, bone defects in dogs were also most frequently Class Ie (86.6%), while merely two out of 15 defects were Classes Ia and Ic (6.7%, respectively). Conclusions: Within the limits of the present study, it might be concluded that configurations and sizes of ligature‐induced peri‐implantitis bone defects in dogs seemed to resemble naturally occurring lesions in humans.