Table 1.

Birefringence of dehydrated oriented collagen scaffolds.

	Type	Collagen	Retardation (nm)	Thickness (μm)	Birefringence (×103)
(a)	Oriented string	Rat tail type-I	195	57	3.4
(b)	Oriented string	Porcine skin type-I	213	92	2.3
(c)	Single-layer oriented sheet (high density)	Rat tail type-I	127	62	2.0
(d)	Single-layer oriented sheet (high density)	Porcine skin type-I	83.4	55	1.5
(e)	Single-layer oriented sheet	Rat tail type-I	3.6	16	0.2
(f)	Single-layer oriented sheet	Porcine skin type-I	13	11	1.2
(g)	Unoriented sheet	Rat tail type-I	1.7	12	0.1
(h)	Unoriented sheet	Porcine skin type-I	5.2	21	0.3