Figure 4.

Microscopic structures of the damaged tendon tissues. (a) The rectangular area illustrated where the tendon tissues were sampled for frozen sectioning and confocal microscopy. (b) to (f) Representative microscopic structures of the tendons damaged by the Healix Peek anchor (b), the Fastin RC anchor (c), the Bio-Corkscrew Suture anchor (d), the Healix Transtend anchor inserted through the Percannula system (e), and the Healix Transtend anchor inserted without any cannula (f). Orientation of the photographs: top, edge of the damaged tendon (arrows); bottom, toward the normal part of the tendon. The green fluorescence was the autofluorescence of the tendon fibers. Original magnification, 100x.