Biomechanical evaluation of high tibial osteotomy plate with internal support block using finite element analysis

High tibial osteotomy (HTO) is a common treatment for medial knee arthrosis. However, a high rate of complications associated with a plate and a significant loss of correction have been reported. Therefore, an internal support block (ISB) is designed to enhance the initial stability of the fixation...

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Bibliographic Details
Published in:PloS one 2021-02, Vol.16 (2), p.e0247412-e0247412
Main Authors: Yang, Jesse Chieh-Szu, Lin, Kuan-Yu, Lin, Hsi-Hsien, Lee, Oscar K
Format: Article
Language:English
Subjects:
Algorithms
Biology and Life Sciences
Biomechanics
Biomedical materials
Bones
Boundary conditions
Care and treatment
Clinical medicine
Computer programs
Computer simulation
Data analysis
Drafting software
Editing
Electronic mail
Engineering and Technology
Finite element analysis
Finite element method
Hospitals
Knee
Knee pain
Load
Locking
Material properties
Mathematical models
Medicine
Medicine and Health Sciences
Mesh generation
Methodology
Nursing
Orthopedics
Osteotomy
Physical Sciences
Posture
Regenerative medicine
Screws
Software
Tissue engineering
Titanium alloys
Transplants & implants
Visualization
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Description
Summary:High tibial osteotomy (HTO) is a common treatment for medial knee arthrosis. However, a high rate of complications associated with a plate and a significant loss of correction have been reported. Therefore, an internal support block (ISB) is designed to enhance the initial stability of the fixation device that is important for successful bone healing and maintenance of the correction angle of the osteotomy site. The purpose of this study was performed to examine if an internal support block combined with a plate reduces the stress on the plate and screw area. Finite element models were reconstructed following three different implant combinations. Two loading conditions were applied to simulate standing and initial sit-to-stand postures. Data analysis was conducted to evaluate the axial displacement of the posteromedial tibial plateau, which represents the loss of the posteromedial tibial plateau in clinical observation. Moreover, the stresses on the bone plate and locking screws were evaluated. Compared to the TomoFix plate, the ISB reduced the axial displacement by 73% and 76% in standing and initial sit-to-stand loading conditions, respectively. The plate with an ISB reduced stress by 90% on the bone plate and by 73% on the locking screw during standing compared to the standalone TomoFix plate. During the initial sit-to-stand loading condition, the ISB reduced the stress by 93% and 77% on the bone plate and the locking screw, respectively. The addition of the PEEK block showed a benefit for structural stability in the osteotomy site. However, further clinical trials are necessary to evaluate the clinical benefit of reduced implant stress and the internal support block on the healing of the medial bone tissue.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0247412