Table 1. Material composition/experimental conditions.

Material composition/experimental condition	Abbreviation
PLLA	PLLA
PLLA and 30 wt% hydroxyapatite	PLLA/HA
PLLA and collagen (1:1)	PLLA/COL
PLLA and collagen (1:1) and 30 wt% hydroxyapatite	PLLA/COL/HA
PLLA and collagen (1:1) and 30 wt% hydroxyapatite in the presence of BMP7	PLLA/COL/HA + BMP7
PisPLLA	PisPLLA
PisPLLA and 30 wt% hydroxyapatite	PisPLLA/HA
PisPLLA and collagen (1:1)	PisPLLA/COL
PisPLLA and collagen (1:1) and 30 wt% hydroxyapatite	PisPLLA/COL/HA
PisPLLA and collagen (1:1) and 30 wt% hydroxyapatite in the presence of BMP7	PisPLLA/COL/HA + BMP7