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Osteochondral Tissue Cell Viability Is Affected by Total Impulse during Impaction Grafting
Paul Balash1, Richard W Kang1, Thorsten Schwenke1
1Rush University Medical Center, Chicago, Illinois, USA.
Cartilage
|June 13, 2015
Summary
Impacting osteochondral grafts affects cell viability, with higher impulse magnitudes causing more initial cell death. However, this effect diminishes by day 8, aiding the definition of optimal graft insertion conditions.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Cartilage repair
Background:
- Osteochondral graft transplantation restores hyaline cartilage.
- Surgical impaction can harm graft cells and cartilage.
- Cell death from impaction impacts graft success.
Purpose of the Study:
- To test if impulse magnitude affects osteochondral plug cell viability.
- To investigate the relationship between impaction force and cell death.
- To define optimal conditions for osteochondral graft transplantation.
Main Methods:
- Controlled laboratory study using bovine stifle joints.
- Ninety-six osteochondral plugs impacted with varied impulse magnitudes.
- Cell viability assessed via Live/Dead staining and histology at days 0, 4, and 8.
Main Results:
- Cartilage integrity maintained post-impaction.
- Higher impulse magnitudes correlated with increased initial cell death.
- The relationship between impulse and cell death was not significant at day 8.
Conclusions:
- Impulse magnitude directly impacts osteochondral graft cell viability.
- Press-fit characteristics significantly influence impulse magnitude.
- Findings help define optimal surgical conditions for graft transplantation.
