Biomechanics of osteochondral impact with cushioning and graft Insertion: Cartilage damage is correlated with delivered energy.

ABSTRACT: Articular cartilage is susceptible to impact injury. Impact may occur during events ranging from trauma to surgical insertion of an OsteoChondral Graft (OCG) into an OsteoChondral Recipient site (OCR). To evaluate energy density as a mediator of cartilage damage, a specialized drop tower apparatus was used to impact adult bovine samples while measuring contact force, cartilage surface displacement, and OCG advancement. When a single impact was applied to an isolated (non-inserted) OCG, force and surface displacement each rose monotonically and then declined. In each of five sequential impacts of increasing magnitude, applied to insert an OCG into an OCR, force rose rapidly to an initial peak, with minimal OCG advancement, and then to a second prolonged peak, with distinctive oscillations.

SUBMITTER: Su AW 

PROVIDER: S-EPMC5932244 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature