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Stress distribution pattern in all-on-four maxillary restorations supported by porous tantalum and solid titanium implants using three-dimensional finite element analysis. | LitMetric

AI Article Synopsis

  • The study investigates how stress is transferred and distributed at the bone-implant interface in all-on-four maxillary restorations using porous tantalum and solid titanium implants through 3D finite element analysis (FEA).
  • A total of 10 models were created to analyze stress distribution patterns around the implants under a 200 N load, comparing effects of posterior implant tilting and the number of implants (four vs. six) on stress levels in both cancellous and cortical bone.
  • Results indicate that tantalum implants have a greater capacity for stress transfer to surrounding bone compared to solid titanium implants, with different effects observed in stress levels depending on the type of implant and adjustments in implant tilting or quantity

Article Abstract

Success/failure of dental implants depends on stress transfer and distribution at the bone-implant interface. This study aimed to assess the stress distribution pattern in all-on-four maxillary restorations supported by porous tantalum and solid titanium implants using three-dimensional (3D) finite element analysis (FEA). In this FEA, a geometric model of an edentulous maxilla, Zimmer screw-vent tantalum and solid titanium implants were modelled. Four models with the all-on-four concept were designed. The fifth model had 6 vertical implants (all-on-six). Two different implant types (porous tantalum and solid titanium) were modelled to yield a total of 10 models, and subjected to 200 N bilateral vertical load. Pattern of stress distribution and maximum von Mises stress values in cancellous and cortical bones around implants were analysed. In tantalum models, the effect of increasing the distal tilting of posterior implants was comparable to the effect of increasing the number of implants to 6 on von Mises stress values in cortical bone. However, in cancellous bone, the effect of increasing the tilting of posterior implants on stress was slightly greater than the effect of increasing the number of implants to 6. In solid titanium models, the effect of both of the abovementioned parameters was comparable on stress in cancellous bone; but in cortical bone, the effect of increasing the implant number was slightly greater on stress reduction. Despite similar pattern of stress distribution in bone around implants, higher maximum von Mises stress values around tantalum implants indicate higher stress transfer capacity of this type of implant to the adjacent bone, compared with solid titanium implants.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11017177PMC
http://dx.doi.org/10.4081/ejtm.2024.12170DOI Listing

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