title: [Two-dimensional finite element stress analysis of simulating restored teeth with wedge-shaped defects under loads].
abstract: OBJECTIVE
  To study the concentration of stresses at the cervix with simulating restoration of tooth defects.
  
  
  METHODS
  A two-dimensional finite element model of a mandible first premolar with defect from longitudinal section was developed. The model was simulatedly restored, respectively by composite resin and glass ionomer cement, and then investigated stress variation in the cervical area.
  
  
  RESULTS
  In the restored models, both of materials improved the concentration of stresses at the cervical area. The composite resin and the glass ionomer cement restorations made the maximum principal stresses declined respectively to 36.2 MPa and 42.5 MPa, which were close to the value of normal tooth in the deepest area of defects.
  
  
  CONCLUSIONS
  The concentration of stresses are improved in the cervical area with teeth defects restored.
authors.affiliation: Department of Operative Dentistry and Endodontics, Peking University School of Stomatology, Beijing 100081, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Jia-de
authors.initials: JD
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Huo
mesh_terms: D003188:Composite Resins; D003793:Dental Restoration, Permanent; D020342:Finite Element Analysis; D005899:Glass Ionomer Cements; D006801:Humans; D014072:Tooth Abrasion / Q000503:physiopathology / Q000628:therapy*
chemical_list: D003188:Composite Resins; D005899:Glass Ionomer Cements