title: Microradiographic study of demineralization of shark enamel in a human caries model.
abstract: The aim of the present study was to compare the resistance of fluoroapatite (shark enamel) and hydroxyapatite (human enamel) against a high caries challenge in a human in vivo model. Two samples of shark enamel and human enamel were each placed in removable appliances in six children and carried for 1 month and a plaque retentive device was placed over each enamel sample. The results showed that the mean total mineral loss (delta Z) was 1680 vol% micron in human enamel and 965 vol% micron in shark enamel. The corresponding mean values for lesion depth were 90 micron and 36 micron, respectively. It is concluded that even shark enamel containing 30,000 ppm F has a limited resistance against caries attacks.
authors.affiliation: Department of Pedodontics and Caries Prophylaxis, Dental Faculty, University of Oslo, Norway.
authors.forename: B
authors.initials: B
authors.lastname: Ogaard
authors.forename: G
authors.initials: G
authors.lastname: Rölla
authors.forename: J
authors.initials: J
authors.lastname: Ruben
authors.forename: T
authors.initials: T
authors.lastname: Dijkman
authors.forename: J
authors.initials: J
authors.lastname: Arends
mesh_terms: D000293:Adolescent; D000818:Animals; D001031:Apatites; D002648:Child; D003731:Dental Caries / Q000000981:diagnostic imaging*; D003733:Dental Caries Susceptibility; D003743:Dental Enamel / Q000000981:diagnostic imaging*; D017886:Durapatite; D006801:Humans; D006882:Hydroxyapatites; D008852:Microradiography; D012754:Sharks
chemical_list: D001031:Apatites; D006882:Hydroxyapatites; D017886:Durapatite; C025105:fluorapatite