title: Analyzing the effects of the platform-switching procedure on stresses in the bone and implant-abutment complex by 3-dimensional fem analysis.
abstract: The purpose of this study was to investigate the effect of 2 different abutment types on the stress distribution in peri-implant bone and within the implant-abutment complex using 3-dimensional finite element analysis. A simple cylindrical implant (4 × 11 mm) was used in this study for efficacy calculation. One model simulated a 4.00-mm-diameter abutment connection, and the other was narrower, using a 3.2-mm-diameter abutment connection assuming a platform-switching configuration. The stress level in the cervical bone area at the implant was greatly reduced when the narrow-diameter abutment was connected compared with the regular-sized one, despite the fact that the stress level in the implant-abutment complex was increased. The results obtained in the platform-switching model can contribute to reduce the stress level at the implant-bone interface area. Results from this study showed the platform-switching procedure has the biomechanical advantage of shifting the stress concentration area away from the cervical bone-implant interface. The disadvantage of the configuration is the increasing stress in the abutment and implant-abutment junction.
authors.affiliation: Department of Prosthodontics, Istanbul University, Faculty of Dentistry, Istanbul, Turkey.
authors.forename: Haydar
authors.initials: H
authors.lastname: Cimen
authors.forename: Esengün
authors.initials: E
authors.lastname: Yengin
mesh_terms: D001696:Biomechanical Phenomena; D001842:Bone and Bones / Q000473:pathology / Q000502:physiology*; D003198:Computer Simulation; D003442:Crowns; D000044:Dental Abutments; D003722:Dental Alloys / Q000737:chemistry; D059605:Dental Implant-Abutment Design; D015921:Dental Implants; D017267:Dental Prosthesis Design; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008954:Models, Biological; D009532:Nickel / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
chemical_list: D003722:Dental Alloys; D015921:Dental Implants; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium