The<unk>  is a cuff of periosteal<unk>  that forms around the diaphysis of the hyaline cartilage model in developing long<unk> s. The<unk>  appears during endochondral<unk>  development to support the growing<unk>  and help it retain its shape.
Bone collar
Spinal board
Casal collar
Interbody fusion cage
Syndesmotic screw
Cervical collar
Condylar decompression
Baffle 