title: Analysis of load distribution in tooth-implant supported fixed partial dentures by the use of resilient abutment.
abstract: BACKGROUND
  Differences between the tooth and implant response to load can lead to many biological and technical implications in the conditions of occlusal forces.
  
  
  OBJECTIVE
  The objective of this study was to analyze load distribution in tooth/implant-supported fixed partial dentures with the use of resilient TSA (Titan Shock Absorber, BoneCare GmbH, Augsburg, Germany) abutment and conventional non-resilient abutment using finite element method.
  
  
  METHODS
  This study presents two basic 3D models. For one model a standard non-resilient abutment is used, and on the implant of the second model a resilient TSA abutment is applied. The virtual model contains drawn contours of tooth, mucous membranes, implant, cortical bones and spongiosa, abutment and suprastructure. The experiment used 500 N of vertical force, applied in three different cases of axial load. Calculations of von Mises equivalent stresses of the tooth root and periodontium, implants and peri-implant tissue were made.
  
  
  RESULTS
  For the model to which a non-resilient abutment is applied, maximum stress values in all three cases are observed in the cortical part of the bone (maximum stress value of 49.7 MPa). Measurements of stress and deformation in the bone tissue in the model with application of the resilientTSA abutment demonstrated similar distribution; however, these values are many times lower than in the model with non-resilient TSA abutment (maximum stress value of 28.9 MPa).
  
  
  CONCLUSIONS
  Application of the resilient TSA abutment results in more equal distribution of stress and deformations in the bone tissue under vertical forces. These values are many times lower than in the model with the non-resilient abutment.
authors.forename: Mirko
authors.initials: M
authors.lastname: Glisić
authors.forename: Dragoslav
authors.initials: D
authors.lastname: Stamenković
authors.forename: Aleksandar
authors.initials: A
authors.lastname: Grbović
authors.forename: Aleksandar
authors.initials: A
authors.lastname: Todorović
authors.forename: Aleksa
authors.initials: A
authors.lastname: Marković
authors.forename: Branka
authors.initials: B
authors.lastname: Trifković
mesh_terms: D001732:Bite Force; D000044:Dental Abutments; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D020342:Finite Element Analysis; D006801:Humans; D003765:Models, Dental; D014070:Tooth; D016474:Weight-Bearing
chemical_list: D015921:Dental Implants