Peer-reviewed veterinary case report
Strength and load limits of titanium femur implants for dogs
By Panfilov I et al.·2025·Department of Theoretical and Applied Mechanics·View original on Europe PMC →
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Original publication title: Stress-Strain State Investigation and Ultimate Load on Femoral Implants Based on S-Type Ti6Al4V Titanium Alloy.
- Species:
- dog
Plain-English summary
This study looked at hip replacements in dogs, specifically focusing on the strength of titanium implants used in these surgeries. Researchers found that many implants can break or harm the bone because their shapes haven't been properly tested for strength before surgery. They used advanced imaging and computer modeling to analyze how these implants handle weight and stress. In their tests, they discovered that when the implant is firmly supported, it can handle a load of up to 30.1 kilograms. Overall, the findings suggest that better pre-surgery strength assessments could improve the safety and effectiveness of these implants.
Abstract
Hip replacement is a widespread surgical procedure that eliminates pain and restores motor functions of the pathologically altered hip joint. The issue lies in the lack of pre-operative strength calculations for implant shapes. So, they tend to break after surgery or damage the bone due to the complex stress-strain state. In the present paper, we studied the stress-strain state and ultimate load of S-type canine femoral implants based on titanium alloy Ti6Al4V using finite element analysis for static and cyclic loads. X-ray computed micro tomography data were used to construct the models. Re-engineering and restoration of the 3D geometry of the product were conducted. Strength analysis was performed in the finite element analysis software package Ansys Mechanical was used for various types of implant support. Locations with stress concentrators were identified, and ultimate loads on the implant were obtained. The influence of the rigidity of the support on the prosthesis stem was also studied. For the case of rigid support, the stress-strain state of the prosthesis was studied and the ultimate load was found to be 30.1 kg.
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Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/40422851