In vitro and in vivo degradation of bioabsorbable PLLA spinal fusion cages

The in vitro and in vivo degradation of poly‐L‐lactic acid cages used as an adjunct to spinal arthrodesis was investigated. In the in vitro experiments cages were subjected to aging up to 73 weeks in phosphate‐buffered solution (pH 7.4) at 37 °C. Inherent viscosity, crystallinity, and mechanical …