Abstract
Purpose: Subchondral drilling is an established marrow stimulation technique for symptomatic small articular cartilage defects, but the effect of drill hole number per unit area remains unclear. In the current study we first tested the hypothesis that osteochondral repair is improved when the subchondral bone plate is perforated with a higher number of drill holes. Second, we tested the hypothesis that subchondral drilling per se is superior to defect debridement alone.
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