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1 Department of Anthropology, California State University, Hayward, California 94542, USA, and Departments of Botany and Oral Surgery, University of California, Berkeley and San Francisco, California 94143
Scanning electron micrographs were taken of sets of human molars-those of paleo-Indians used in mastication of, ostensibly, a highly abrasive diet, and those of contemporary Americans. Different ultrastructural patterns of enamel wear were observed between the groups.
Submitted on May 25, 1973
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