Fig. 6From: Amorphous calcium phosphate nanoparticles using adenosine triphosphate as an organic phosphorus source for promoting tendon–bone healingRepresentative picrosirius red and collagen I/II staining of the supraspinatus tendon enthesis at 4 and 8 weeks postoperatively. a picrosirius red staining. b collagen I staining. c collagen II staining. B, bone; I, interface; T, tendonBack to article page