Mi-crostructure of callus (bone histomorphometry) showed that area of mature trabecular in callus of OPFM group was smaller than that of CFM group, and its thickness was thinner with a wide intertrabecular distance.

• 骨痂组织骨组织形态计量学结果发现; OPFM组成熟小梁骨占骨痂面积比较CFM组小,且小梁骨厚度变薄、小梁骨间距较宽;