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Morphogenetic and functional characteristics of coronal cementum in bovine molars
Author(s) -
AINAMO JUKKA
Publication year - 1970
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1970.tb02085.x
Subject(s) - cementum , enamel paint , coronal plane , molar , dental cementum , dentistry , cementogenesis , apposition , connective tissue , enamel organ , tooth eruption , anatomy , dentin , ameloblast , medicine , pathology
— Coronal cementum in bovine teeth has been implied to be homologous with enamel cuticles in man. A radiographic and histologic study of the life cycle of the bovine first permanent molar was undertaken in order to test the validity of this view. Formation of coronal cementum was found to be preceded by a total disintegration of the reduced enamel epithelium and to start in the cuspal area before eruption of the tooth into the oral cavity. Fibrous attachment of the connective tissue to the coronal cementum thus prevented the formation of a deep gingival pocket around the erupting tooth. Shortly after the tooth had reached occlusion, cementum was found to cover the enamel all the way to the apical enamel border. The tooth was thus attached not only by its short root but also by a substantial area of its anatomical crown. With advancing age, occlusal wear and subsequent progressive eruption of the tooth resulted in an apposition of multiple layers of cellular cementum on both the root and cervical enamel surfaces, Neither its morphogenetic characteristics nor its vital function in tooth attachment seemed to indicate that coronal cementum in bovine teeth corresponds to enamel cuticles in man.