Figure [3].

Mechanical properties of the injectable stem cell constructs. Each specimen contained 50% by volume of microbeads that encapsulated 150,000 hUCMSCs. The strength and work-of-fracture (mean ± sd; n = 5) of the constructs were greatly increased via the incorporation of chitosan and fibers. Values for cancellous bone, injectable polymer, and hydrogels are obtained from the literature, as described in the Discussion section.