THE COFFIN BONE WITH PERIOSTEUM AND INSERTION ZONE OF THE SUSPENSORY APPARATUS

The coffin bone is fixed to the hoof capsule by a particular suspensor y apparatus. That is attached with its fibrocatilaginous insertion zon e on the parietal surface of the coffin hone. During growth of the cof fin bone, osseous lamellae are formed by indirect ossification, as cal cified fibrocartilage is replaced by lamellar bone, The periosteum on the parietal surface of the coffin bone is confined to the grooves bet ween the osseous lamellae. The meanings of periosteum and of the inser tion zone of the suspensory apparatus for growth and healing of fractu res of the coffin bone are explained.