Fig. 1

Graft materials. Fixation pin u-HA/PLLA (1.5 mm in diameter × 6 mm in length). u-HA/PDLLA composite block (8 mm in diameter× 2 mm in height)
Graft materials. Fixation pin u-HA/PLLA (1.5 mm in diameter × 6 mm in length). u-HA/PDLLA composite block (8 mm in diameter× 2 mm in height)