Table 1. Qualitative analysis of the main features of IVD ultrastructure.

Parameters	Lamellar Organization	Matrix Density		Collagen Fibers
IVD Area	AF	AF	NP	AF	NP
Control	+++	+++	+++	Low Variation	Low Variation
Cavity	+	++	+	Moderate Variation	High Variation
C+hMSCs	++	+++	++	Moderate Variation	Moderate Variation