developed in our lab.14 (link) For infiltration,
grafts and host tissues were cultured in a 25% DLLA-EG HBSS solution
with 0.2% LAP for 5 min. Afterward, the implant was inserted into
the host tissue with an open space ranging from 0 to 1 mm in diameter.
The open space was filled with the DLLA-EG/LAP solution, and then
the whole construct was subject to illumination for 2 min. We first
used the DLLA-EG/LAP solution to fill the open space but without the
presoaking (infiltration) process. Then, we used fibrin glue (Tisseel,
Baxter Healthcare Corp, Deerfield, IL) to fill the open space (without
using PDLLA-PEG); these were the two controls. All cartilage explants
were cultured in chondrogenic medium (DMEM with 1%
1% insulin transferrin-selenium (Invitrogen, Carlsbad, CA, USA), 10
ng/mL transforming growth factor-β3 (TGF-β3; PeproTech,
Rocky Hill, NJ, USA), 100 nM dexamethasone, 50 μM