title: Three-dimensional finite element analyses of all-ceramic posterior fixed partial dentures with different designs.
abstract: The aim was to evaluate the influence on the stress distribution patterns in and the magnitude of stresses on fixed partial dentures (FPDs) under different anatomic and design conditions. Three-dimensional finite element models of posterior 3-unit all-ceramic FPDs were created with and without periodontal ligaments, with different radii of curvature at the embrasure area, and in a curve shape with a periodontal ligament. The model with a periodontal ligament showed 40% higher stress values compared to the no-ligament model. A smaller radius of curvature resulted in 20% to 40% higher stress values. The curved model increased stress values at the distal connector by 65% compared to the straight model. Support by teeth, occlusal curvature, and a small radius of curvature at the embrasure area negatively affect stress distribution patterns in the connector area of all-ceramic FPDs.
authors.affiliation: Faculty of Odontology, Malmo University, Sweden. margareta.molin@od.mah.se
authors.forename: Margareta K
authors.initials: MK
authors.lastname: Molin
authors.forename: Michael P
authors.initials: MP
authors.lastname: Onesti
authors.forename: Thomas B
authors.initials: TB
authors.lastname: Petersson
authors.forename: Tore B
authors.initials: TB
authors.lastname: Dérand
mesh_terms: D002516:Ceramics / Q000737:chemistry; D017267:Dental Prosthesis Design / Q000379:methods*; D003799:Dental Stress Analysis / Q000379:methods*; D003830:Denture, Partial, Fixed; D020342:Finite Element Analysis; D010513:Periodontal Ligament; D013718:Tensile Strength