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X-ray radiographs of large bone repair in rabbits with phosphorylated chitosan (P-chitosan) containing biodegradable calcium phosphate cements (CPCs): (a) 1 week (0.12 g/mL P-chitosan); (b) 4 weeks (0.14 g/mL P-chitosan); (c) 12 weeks (0.12 g/mL P-chitosan); (d) 12 weeks (0.07 g/mL P-chitosan); (e) 12 weeks (0.02 g/mL P-chitosan); (f) 22 weeks (0.12 g/mL P-chitosan). Image reproduced with permission from [33].
