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Comparing Cementing Techniques in Total Knee Arthroplasty: An In Vitro Study.
Thomas Wetzels1,2, Joost van Erp1, Reinoud W Brouwer1
1Department of Orthopedic Surgery, Martini Ziekenhuis, Groningen, The Netherlands.
The Journal of Knee Surgery
|September 7, 2018
Summary
Applying cement to both the tibial bone and component significantly improves cement penetration, reducing the risk of aseptic loosening in total knee arthroplasty. This technique enhances interface strength for better long-term implant survival.
Area of Science:
- Orthopedic Surgery
- Biomaterials Engineering
- Medical Device Technology
Background:
- Aseptic loosening is a primary cause of revision surgery in total knee arthroplasty (TKA).
- Optimal cement penetration (2-5 mm) is crucial for interface strength and reducing loosening risk.
- Current TKA cementing techniques vary widely despite established optimal penetration guidelines.
Purpose of the Study:
- To evaluate and compare two distinct cementing techniques for cement penetration on the tibial and femoral components in TKA.
- To determine the impact of cement application location (bone vs. component) on cement penetration depth and distribution.
Main Methods:
- Utilized five paired cadaveric knees for TKA implantation, mimicking clinical procedures.
- Compared cement application to bone surface alone versus bone and component on the tibial side.
- Assessed cement application to the component alone versus bone surfaces (anterior, distal) on the femoral side.
- Quantified cement penetration using digital software after cement curing and component removal.
Main Results:
- Cementing both the tibial bone surface and component significantly increased penetration (3.46 mm) versus bone alone (2.66 mm) (p=0.007).
- Distal femoral cement penetration showed no significant difference between bone (2.81 mm) and component (2.91 mm) application.
- Applying cement to the anterior femoral bone surface, compared to the component alone, enlarged cement distribution length (2.48 mm vs. 0.96 mm) (p=0.011).
- Minimal cement was observed on the posterior femoral cut surface.
Conclusions:
- Applying cement to both the tibial bone surface and the component is superior for improving cement penetration.
- Femoral cementing strategies require further investigation, with anterior bone surface application potentially beneficial for distribution.
- Optimizing cementing techniques is vital for enhancing cement-bone interface strength and mitigating TKA revision rates.
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