title: The nature of the hyaline rings in chronic periostitis and other conditions: an ultrastructural study.
abstract: The hyaline rings found in chronic periostitis and a radicular cyst were investigated ultrastructurally. These rings were composed of fine fibrillar material which was probably derived from degraded collagen fibrils, all of which eventually became degraded and unrecognizable. Foreign-body material in the form of circular bodies of probable plant origin were also found and should not be confused with the hyaline rings.
mesh_terms: D002908:Chronic Disease; D003094:Collagen / Q000378:metabolism; D006801:Humans; D006818:Hyalin; D007568:Jaw / Q000648:ultrastructure*; D010522:Periostitis / Q000473:pathology*
chemical_list: D003094:Collagen