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Fig. 2 Tendon regeneration proceeds through a rapid series of phases within the first week post-injury.
Masson’s trichrome staining of sections from regenerating tendons at 1 (left), 3 (middle), and 5 (right) dpi. Heavy infiltration of cells with myeloid-like morphologies can be seen at 1 dpi (yellow arrowheads). At 3 dpi, a fibroblastic bridge connecting the two severed tendon ends is evident. By as early as 5 dpi, the beginnings of collagen matrix deposition into the injury site are observed (green arrowheads). Yellow asterisks denote severed tendon ends and images were taken at 10x magnification. Dpi, days post-injury.