Hargreaves, J. A.Cleaton-Jones, P. E.Williams, S. D. L.2017-03-282017-03-281989Hargreaves, J.A., Cleaton-Jones, P.E. and Williams, S.D.L. 1989. Hypocalcification and hypoplasia in permanent teeth of children from different ethnic groups in South Africa assessed with a new index. Advances in dental research;3(2):126-131http://hdl.handle.net/10539/22249A new descriptive index, the HHI (hypocalcification-hypoplasia index), is described for comparing enamel defects in groups of people. The index was used in a study completed in 1986, in which 1251 11-year-old children from different ethnic groups resident in South Africa were examined: 210 rural black, 203 urban black, 206 urban colored, 426 urban Indian, and 206 urban white. The index can be used as a screening examination, and the results from these different ethnic groups are presented.enCopyright © 1989, © SAGE PublicationsDental Enamel Hypoplasia/epidemiologyTooth AbnormalitiesSouth Africa/epidemiologyTooth CalcificationArticle