TABLE 4.

Degradation rates of volume fraction (k_N ) and elastic modulus (k_E ) of scaffold material for the three degradation modalities and the three degradation speeds investigated with the “artificial” scaffold. The time of complete scaffold degradation for each degradation speed is indicated in brackets. The volume fraction is expressed as percentage of the volume of one element.

Degradation modality	Fast (25 days)	Matched (50 days)	Slow (100 days)
Surface erosion	Surface elements: k N = 4%/day	Surface elements: k N = 2%/day	Surface elements: k N = 1%/day
Bulk degradation	All elements	All elements	All elements
	• k E = 40 MPa/day	• k E = 20 MPa/day	• k E = 10 MPa/day
	• k N = 20%/day	• k N = 10%/day	• k N = 5%/day
Bulk degradation with autocatalysis	Surface elements	Surface elements	Surface elements
	• k E = 40 MPa/day	• k E = 20 MPa/day	• k E = 10 MPa/day
	• k N = 20%/day	• k N = 10%/day	• k N = 5%/day
	Bulk elements	Bulk elements	Bulk elements
	• 2k E = 80 MPa/day	• 2k E = 40 MPa/day	• 2k E = 20 MPa/day
	• k N = 40%/day	• k N = 20%/day	• k N = 10%/day