title: The influence of a flexible coating on the bone stress around dental implants.
abstract: The influence of a three-layered flexible coating of Polyactive on bone stress distribution was investigated by three-dimensional finite element models of mandibular bone, in which a titanium implant (coated or uncoated) was located. Polyactive is a system of poly(ethylene oxide) poly(butylene terephthalate) segmented co-polymers with bone-bonding capacity. In the case of sagittal and transversal loading, the use of a Polyactive coating reduced both the minimum principal stress in the bone and the compressive radial stress at the bone-implant interface. However, it raised the maximum principal and the tensile radial stress. In the case of vertical loading, the application of a flexible coating reduced the compressive radial stress at the bone-implant interface around the neck of the implant by a factor of 6.6 and the tensile radial stress by a factor of 3.6. Variations in composition and thickness of the coating did not affect the results significantly.
authors.affiliation: Department of Oral-Maxillofacial Surgery, Prosthodontics and Special Dental Care, Faculty of Medicine, University of Utrecht, The Netherlands.
authors.forename: G J
authors.initials: GJ
authors.lastname: Meijer
authors.forename: F J
authors.initials: FJ
authors.lastname: Starmans
authors.forename: C
authors.initials: C
authors.lastname: de Putter
authors.forename: C A
authors.initials: CA
authors.lastname: van Blitterswijk
mesh_terms: D000539:Alveolar Process / Q000502:physiology*; D001672:Biocompatible Materials; D001732:Bite Force; D015921:Dental Implants; D003799:Dental Stress Analysis; D004548:Elasticity; D006801:Humans; D008334:Mandible / Q000502:physiology; D008954:Models, Biological; D008961:Models, Structural; D018583:Pliability; D011091:Polyesters; D011092:Polyethylene Glycols; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D015921:Dental Implants; D011091:Polyesters; C072932:polyethylene oxide-polybutylene terephthalate copolymer; D011092:Polyethylene Glycols