Summary
Direct visualization of individual collagen fibrils by light microscopy in human cartilage was achieved by applying a periodic acid-silver methenamine stain on plastic sections. Collagen fibrils, 100 nm in diameter or thicker, were delineated individually by light microscopy and were easily traced for a length beyond 100μm. Thinner fibrils not readily visible optically were identified if arranged in compact bundles as occurring in the superficial zone of articular cartilage.
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Hwang, W.S., Ngo, K. & Saito, K. Silver staining of collagen fibrils in cartilage. Histochem J 22, 487–490 (1990). https://doi.org/10.1007/BF01007233
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DOI: https://doi.org/10.1007/BF01007233