{"id":{"repo_id":"western-cape","oai_identifier":"oai:uwcscholar.uwc.ac.za:10566/16998"},"canonical_url":"https://search.dev.ndltd.org/etd/western-cape/oai:uwcscholar.uwc.ac.za:10566/16998","repository":{"repo_id":"western-cape","name":"University of the Western Cape","base_url":"https://uwcscholar.uwc.ac.za:8443/server/oai/request"},"display":{"title":"Microhardness and bleaching effectiveness on human tooth enamel after the application of nanohydroxyapatite","abstract":"Various bleaching agents, including hydrogen peroxide and carbamide peroxide, have been used in vital and non-vital bleaching. Nanohydroxyapatite synthesised using green methods are reported to possess bleaching potential. Although studies have indicated a reduction in enamel microhardness following bleaching, the correlation between bleaching and enamel hardness is inconsistent. This in vitro study aimed to investigate the potential of nanohydroxyapatite (nHA) as a bleaching agent and its effect on enamel microhardness on its own as well as in combination with carbamide peroxide (CP).","abstract_html":"Various bleaching agents, including hydrogen peroxide and carbamide peroxide, have been used in vital and non-vital bleaching. Nanohydroxyapatite synthesised using green methods are reported to possess bleaching potential. Although studies have indicated a reduction in enamel microhardness following bleaching, the correlation between bleaching and enamel hardness is inconsistent. 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