Srpski arhiv za celokupno lekarstvo 2016 Volume 144, Issue 3-4, Pages: 188-195
https://doi.org/10.2298/SARH1604188G
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Analysis of load distribution in tooth-implant supported fixed partial dentures by the use of resilient abutment
Glišić Mirko (Faculty of Dental Medicine, Clinic for Prosthodontics, Belgrade)
Stamenković Dragoslav (Faculty of Dental Medicine, Clinic for Prosthodontics, Belgrade)
Grbović Aleksandar 
(Faculty of Mechanical Engineering, Belgrade)
Todorović Aleksandar (Faculty of Dental Medicine, Clinic for Prosthodontics, Belgrade)
Marković Aleksa (Faculty of Dental Medicine, Clinic for Oral Surgery, Belgrade)
Trifković Branka (Faculty of Dental Medicine, Clinic for Prosthodontics, Belgrade)
Introduction. 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 resilient TSA 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). Conclusion. 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.
Keywords: dental implant-abutment design, fixed partial denture, stress distribution