highly significantP < 0.001
On the other hand, the Pearson correlation-based comparison between the in vitro and the in vivo degradation volume ratio revealed a highly significant correlation, with an R 2 of 0.74 from 12 weeks' data ( P < 0.001), 0.89 from 24 weeks ( P < 0.001), and 0.75 from total ( P < 0.001).