Fig. 2.

(a) Biodegradation mechanism of metals. (Reproduced with permissions from Ref. [97]). (b) The evolution of degradation behavior and mechanical integrity of biodegradable metallic stents during the vascular healing process. (Reproduced with permissions from Ref. [94]). (c) Schema of biodegradable metallic stents over time post-procedure (The left part of the stent in each panel shows the surface layer and right part refers to the internal strut). (Reproduced with permissions from Ref. [98]). (d) The evolution of the degradation behavior and the mechanical integrity of BMs during bone healing process. (Reproduced with permissions from Ref. [94]). (e) Healing process stages in fractured bone. (Reproduced with permissions from Ref. [99]). (f) Healing period for the fixation of autologous bone grafts or bone fracture. (Reproduced with permissions from Ref. [100]).