Abstract：
BACKGROUND:The stability of acetabulum reconstructions using reinforcement rings and hooks is important for successful replacement surgery. The objective of this study was to biomechanically determine the effects of the hook on stress and the related micromotions of the acetabular reinforcement ring during the immediate postoperative period. METHODS:Acetabular reinforcement ring models were developed using a nonlinear, three-dimensional, finite element method. Using a pre-prepared template, we constructed without-hook and bone graft models of varying volumes and material properties. RESULTS:The stress on the inferior margin of the acetabulum was higher in the with-hook model than in the without-hook model, especially with increased bone graft volumes, and the stiffness of the bone graft material was decreased. Relative micromotions in the without-hook model were higher than in the with-hook models. The highest relative micromotion was observed in the model with increased bone graft volume and lower stiffness of bone graft material. CONCLUSIONS:In biomechanical analyses, the hook effectively dispersed stress and improved the initial fixation strength of the acetabular reinforcement ring.
journal_name
J Orthop Surg Resjournal_title
Journal of orthopaedic surgery and researchauthors
Totoribe K,Chosa E,Yamako G,Zhao X,Ouchi K,Hamada H,Deng Gdoi
10.1186/s13018-018-1023-7subject
Has Abstractpub_date
2018-12-07 00:00:00pages
313issue
1issn
1749-799Xpii
10.1186/s13018-018-1023-7journal_volume
13pub_type
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