title: Non-linear 3D evaluation of different oral implant-abutment connections.
abstract: Micro-gaps and osseous overload in the implant-abutment connection are the most common causes of peri-implant bone resorption and implant failure. These undesirable events can be visualized on standardized three-dimensional finite element models and by radiographic methods. The present study investigated the influence of 7 available implant systems (Ankylos, Astra, Bego, Brånemark, Camlog, Straumann, and Xive) with different implant-abutment connections on bone overload and the appearance of micro-gaps in vitro. The individual geometries of the implants were transferred to three-dimensional finite element models. In a non-linear analysis considering the pre-loading of the occlusion screw, friction between the implant and abutment, the influence of the cone angle on bone strain, and the appearance of micro-gaps were determined. Increased bone strains were correlated with small (< 15°) cone angles. Conical implant-abutment connections efficiently avoided micro-gaps but had a negative effect on peri-implant bone strain. Bone strain was reduced in implants with greater wall thickness (Ankylos) or a smaller cone angle (Bego). The results of our in silico study provide a solid basis for the reduction of peri-implant bone strain and micro-gaps in the implant-abutment connection to improve long-term stability.
authors.affiliation: Department for Cranio-Maxillo-Facial and Plastic Surgery, University Hospital Giessen, Klinikstr. 33, 35385 Giessen, Germany. philipp.streckbein@uniklinikum-giessen.de
authors.forename: P
authors.initials: P
authors.lastname: Streckbein
authors.forename: R G
authors.initials: RG
authors.lastname: Streckbein
authors.forename: J F
authors.initials: JF
authors.lastname: Wilbrand
authors.forename: C Y
authors.initials: CY
authors.lastname: Malik
authors.forename: H
authors.initials: H
authors.lastname: Schaaf
authors.forename: H P
authors.initials: HP
authors.lastname: Howaldt
authors.forename: M
authors.initials: M
authors.lastname: Flach
mesh_terms: D001696:Biomechanical Phenomena; D003198:Computer Simulation; D059605:Dental Implant-Abutment Design; D015921:Dental Implants; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D017711:Nonlinear Dynamics
chemical_list: D015921:Dental Implants