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Titre : | Bone cyst formation after ankle arthroplasty may be caused by stress shielding : a numerical simulation of the strain adaptive bone remodelling |
Type de document : | article de périodique |
Auteurs : | Hazibullah Waizy, Auteur ; [et al.], Auteur |
Année de publication : | 2017 |
Article en page(s) : | p. 14-19 |
Langues : | Anglais (eng) |
Descripteurs (mots clés) : | [Thésaurus Mesh]Arthroplastie [Thésaurus Mesh]Cheville [Thésaurus Mesh]Kystes
|
Mots-clés : | Stress shielding ankle arthroplasty cysts |
Résumé : | Background: The history of total ankle arthroplasty (TAA) has different evolution steps to improve the outcome.
The third generation implants show an overall 8-year survival rate up to 93%. The main reported reason for early
failure of TAA is aseptic loosening, cyst formation is also frequently reported. The aim of the present study is to
use the finite element (FE) method to analyze the adaptive bone remodeling processes, including cyst formation
after TAA.
Methods: Bone characteristics applied to the model corresponded to information obtained from computed tomography.
Finite element models for the tibia and the talus were developed and implant components were
virtually implanted.
Results: The calculated total bone loss is 2% in the tibia and 17% in the talus. Cysts and areas of increased bone
density were detectable dependent on prosthesis design in the tibia and talus.
Conclusion: Our FE simulation provides a theoretical explanation for cyst formation and increasing bone density
depending on implant design. However, cysts are not mono-causal, histo-chemical reactions should also be
considered. Further clinical studies are necessary to evaluate the relevance of cyst formation and therapeutic
strategies. |
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