Fig. 6From: The application of human periodontal ligament stem cells and biomimetic silk scaffold for in situ tendon regenerationEvaluation of deposited collagen in the repaired tendons. A–F Polarized light examination of repaired tissues with different magnifications. G–I Immunohistochemical staining of COL I in the repaired tendons. The upper right panels indicate the images of lower magnifications. J The percentage of COL I positive area. K Integrated optical density (IOD) values. R group, random silk scaffold alone. A group, aligned silk scaffold alone. AC group, hPDLSCs seeded aligned silk scaffold. *p < 0.05; ***p < 0.001; ****p < 0.0001Back to article page