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Effect of cyclic loading on new polyblend suture coupled with different anchors
Angelo De Carli1, Antonio Vadalà, Edoardo Monaco
1St. Andrea Hospital, University La Sapienza, Rome, Italy.
The American Journal of Sports Medicine
|February 11, 2005
Summary
FiberWire suture significantly enhances rotator cuff repair fixation strength with both metallic and absorbable anchors. It alters failure modes, reducing slippage with metallic anchors and eyelet rupture with absorbable ones.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Materials science
Background:
- Secure tendon-to-bone fixation is critical for successful rotator cuff repair.
- Understanding the biomechanical properties of rotator cuff repair devices is essential.
Purpose of the Study:
- To evaluate the biomechanical response of six common anchor-suture complexes under cyclic loading.
- To compare the fixation strength and failure modes of different rotator cuff repair devices.
Main Methods:
- A controlled laboratory study using fresh-frozen human cadaveric shoulders.
- Testing of two absorbable anchors (5 mm and 6.5 mm) and one metallic anchor, each with Ethibond or FiberWire suture.
- Incremental cyclic loading to failure using an electromechanical testing machine, recording ultimate load and failure mode.
Main Results:
- FiberWire suture demonstrated statistically significant stronger fixation with both metallic and absorbable anchors.
- Metallic anchors predominantly failed due to slippage, while absorbable anchors failed due to eyelet rupture.
- The ultimate failure load and mode of failure varied significantly between anchor-suture configurations.
Conclusions:
- FiberWire suture enhances the cyclic load fixation strength of both metallic and absorbable anchors.
- The use of FiberWire suture influences the failure mode, shifting from anchor slippage to eyelet rupture.
- These findings have implications for improving the reliability and performance of rotator cuff repair devices.