title: Finite element stress analysis on the influence of cuspal angle and superstructure materials in an implant-supported prosthesis.
abstract: OBJECTIVE
  To investigate the effect of superstructure materials and cuspal angle in an implant-supported fixed partial denture.
  
  
  METHODS
  This finite element analysis study was carried out with varying cuspal angulations of 0°, 20° and 33° and superstructure materials. The simulated models were loaded with 300N forces under different axial and non-axial angulations. The graphical and numerical stresses were investigated.
  
  
  RESULTS
  The results demonstrated that the maximum stress occurred in the metal framework in all the materials except acrylic, for which it occurred in the coronal part of the implant. In the acrylic, the maximum stress recorded was 78 MPa with the 20° angulation. Ni Cr recorded a maximum stress of 111 MPa with the 33° angulation.
  
  
  CONCLUSIONS
  The cuspal morphology and type of superstructure material plays a pivotal role in controlling the stress transferred to the implant and the supporting bone.
authors.affiliation: Department of Prosthodontics, SRM Dental College, Ramapuram, Chennai, Tamilnadu, India.
authors.forename: G
authors.initials: G
authors.lastname: Lambodaran
authors.forename: N Gopi
authors.initials: NG
authors.lastname: Chander
authors.forename: M
authors.initials: M
authors.lastname: Vasantakumar
mesh_terms: D003481:Cuspid / Q000737:chemistry*; D019094:Dental Prosthesis, Implant-Supported; D020342:Finite Element Analysis; D006801:Humans; D013314:Stress, Mechanical