Premium
Finite Element Stress Analysis of Applied Forces to Implants and Supporting Tissues Using the “All‐on‐Four” Concept with Different Occlusal Schemes
Author(s) -
Türker Nurullah,
Büyükkaplan Ulviye S.,
Sadowsky Steven J.,
Özarslan Mehmet M.
Publication year - 2019
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.13004
Subject(s) - occlusion , von mises yield criterion , dental alveolus , maxilla , mandible (arthropod mouthpart) , dental occlusion , stress (linguistics) , orthodontics , cortical bone , finite element method , mathematics , biomedical engineering , dentistry , materials science , medicine , structural engineering , anatomy , surgery , engineering , linguistics , philosophy , botany , biology , genus
Purpose The aim of this study was to evaluate stress distributions on implants and alveolar bone due to occlusal load produced during chewing by prostheses prepared according to the All‐on‐Four concept with different occlusal schemes using a finite element analysis method. Materials and Methods On standard jaw models, teeth were set in accordance with the basic standards of canine‐guided occlusion, group function occlusion, bilateral balanced occlusion (BBO), lingualized occlusion, and monoplane occlusion schemes. Three‐dimensional (3D) images of these models were obtained using a surface scanner. Implants, superstructures, the maxilla, and mandible were modeled in the All‐on‐Four concept with 3D modeling software. Forces were defined on contacts formed in maximum intercuspation, lateral, and protrusive movement position for all 5 occlusion types. Stress outputs were recorded as maximum and minimum principal stresses (P max , P min ) and von Mises stress values for the implants. Results The highest P max value for the maxilla was observed in cortical bone in the group function occlusion during lateral movement (15.56 MPa). For the mandible, the highest P max value was observed on the cortical bone in maximum intercuspation of lingualized occlusion (72.75 MPa). The highest P min value for the maxilla was observed during the lateral movement in group function and for the mandible in BBO (–29.23 and –86.31 MPa, respectively). The lowest stress values were observed with canine‐guided occlusion in all related conditions and on all structures. Conclusions With the limitations of this simulation study, considering stresses on alveolar bone and implants in All‐on‐Four applications, the use of canine‐guided occlusion may be suggested.