Figure 1

Integration between repaired cartilage and underlying bone, seen particularly clearly when a section stained with H&E (a) is viewed with polarised light (b) (sample 4). (c) An oblique section from the surface zone (S) through hyaline cartilage of the mosaic plug (H) to fibrocartilage matrix (F), immunostained for type II collagen. (d) H&E-stained higher power of the junctional zone (B, underlying bone) and (e) the same section viewed with polarised light. Full integration can be seen across this zone in sections immunostained for (f) type I and (g) type II collagen (sample 2). H&E = haematoxylin and eosin.