title: Comparison of stress transmission in the IMZ implant system with polyoxymethylene or titanium intramobile element: a finite element stress analysis.
abstract: Using the finite element method, this study modeled a 4.0 x 13.0-mm IMZ implant, restored with a cast gold crown, to examine the influence of the polyoxymethylene (POM) intramobile element (IME) on the transmission of vertical and oblique forces. Stress concentrations in the bone and in components of the implant system were much greater under a 30-degree load than under an equal vertical load. Stress transmission to bone occurred chiefly in the crestal region, and these stresses were not reduced when the IME was modeled in POM rather than in titanium. Maximum stress concentrations occurred in the fastening screw.
authors.affiliation: Department of Family Dentistry, College of Dentistry, The University of Iowa, Iowa City.
authors.forename: D C
authors.initials: DC
authors.lastname: Holmes
authors.forename: W R
authors.initials: WR
authors.lastname: Grigsby
authors.forename: V K
authors.initials: VK
authors.lastname: Goel
authors.forename: J C
authors.initials: JC
authors.lastname: Keller
mesh_terms: D000539:Alveolar Process / Q000502:physiology; D001732:Bite Force; D003198:Computer Simulation; D015921:Dental Implants; D017268:Dental Prosthesis Retention / Q000295:instrumentation; D003799:Dental Stress Analysis / Q000379:methods*; D012117:Resins, Synthetic; D014025:Titanium
chemical_list: D015921:Dental Implants; D012117:Resins, Synthetic; C010102:delrin; D014025:Titanium