Osteochondral Allograft Reaming Significantly Affects Chondrocyte Viability.

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Cell biology

Background:

• Chondrocyte viability is crucial for the clinical success of osteochondral allograft (OCA) transplantation.
• Maintaining chondrocyte health is essential for effective cartilage repair and integration of transplanted tissue.

Purpose of the Study:

• To compare the impact of traditional handheld saline irrigation versus saline submersion during distal femoral OCA plug harvest on regional chondrocyte viability.
• To evaluate the effect of recipient site preparation on cell viability.

Main Methods:

• Four cartilage sample types were harvested from 13 femoral hemicondyles: control, traditional harvest, submerged harvest, and recipient site.
• Donor plugs were harvested using a powered coring reamer, with one group using handheld irrigation and the other submerged in saline.
• Chondrocyte viability was assessed using live/dead cell staining (calcein and ethidium) and quantified via microscopy.

Main Results:

• Saline submersion during harvest significantly preserved chondrocyte viability across the entire plug compared to traditional handheld irrigation (71.5% vs 61.4%).
• Both traditional harvest and recipient site preparation resulted in significantly lower chondrocyte viability compared to control samples.
• No significant difference in cell viability was observed between the control and submerged harvest groups.

Conclusions:

• Harvesting OCA plugs using saline submersion effectively mitigates chondrocyte death induced by thermal damage from powered reamers.
• This improved chondrocyte viability during graft preparation may enhance the clinical outcomes and survival rates of osteochondral allografts.