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Studies interproximal grooving in the hominid dentitions recovered from the Sima de los Huesos Middle Pleistocene cave site of the Sierra de Atapuerca in Spain. Observations of interproximal wear grooves in maxillary and mandibular posterior teeth; Similarity of wear grooves to those in other fossil hominids.

Examines the hypothesis concerning dental size reduction of the posterior teeth during Pleistocene human evolution by analyzing current fossil dental evidence. Sample from the Sierra de Atapuerca hominids in Spain; Similarity of Atapuerca hominids' teeth with modern man; Relationship between tooth size and nutrition; Cell proliferation rate as the cause of dental size reduction.

Studies the prevalence and chronology of enamel hypoplasias in a hominid dental sample at the Sierra de Atapuerca in Spain. Hypoplasias in permanent dentition; Enamel defect in the decidous tooth; Highest frequency of enamel hypoplasia; Comparison of the prevalence and severity of the hypoplasias of the hominid sample and a large Neandertal sample.