title: Three-dimensional evaluation of different prosthesis retention systems using finite element analysis and the Von Mises stress test.
abstract: BACKGROUND
  The aim of this paper is to underline the prosthodontics components features of two different overdenture retention systems on dental implants. The use of titanium, dental implants for replacing missing teeth is today considered to be a predictable procedure giving the patients esthetic and function for long time.
  
  
  METHODS
  Finite element analysis (FEA) and tests based on the Von Mises criterion have been applied in order to evaluate the stress distribution over two different prosthodontics retention systems. Two models with the ball attachment and with the Locator® systems have been created and put on simulated chewing stresses.
  
  
  RESULTS
  The two systems were subjected to axial and oblique forces and both guaranteed good results over simulated masticatory cycle. However, the Locator system seemed to better respond to the overall load distributions.
  
  
  CONCLUSIONS
  Clinicians should choose the better prosthetic solution for the ridge they want to restore. Both retention systems offer long-term success if applied following the manufacture guide limitations and suggestions.
authors.affiliation: Department of Biomedical Sciences, Dentistry and Morphological and Functional Imaging, University of Messina, Messina, Italy - acromarco@yahoo.it.
authors.forename: Floriana
authors.initials: F
authors.lastname: Lauritano
authors.forename: Michele
authors.initials: M
authors.lastname: Runci
authors.forename: Gabriele
authors.initials: G
authors.lastname: Cervino
authors.forename: Luca
authors.initials: L
authors.lastname: Fiorillo
authors.forename: Ennio
authors.initials: E
authors.lastname: Bramanti
authors.forename: Marco
authors.initials: M
authors.lastname: Cicciù
mesh_terms: D015921:Dental Implants; D017268:Dental Prosthesis Retention; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D020342:Finite Element Analysis; D006801:Humans; D008409:Mastication; D003765:Models, Dental; D013314:Stress, Mechanical; D016474:Weight-Bearing
chemical_list: D015921:Dental Implants