Fish-eaters and farmers: dental pathology in the Arabian Gulf.

Twelve skeletal samples, previously published, from the Arabian Gulf have been used to trace differences in diet and subsistence patterns through an analysis of dental pathology. The skeletons date from 3,000 BC to AD 1,500 and cover a variety of geographical locations: off-shore islands, Eastern Arabia, and Oman. The dental conditions analyzed are attrition, caries, calculus, abscessing, and antemortem tooth loss (AMTL). Results indicate four basic patterns of dental disease which, while not mutually exclusive, correspond to four basic subsistence patterns. Marine dependency, represented by the Ras el-Hamra population, is indicated by severe attrition, low caries rates, wear-caused abscessing, and a lack of AMTL. The second group of dental diseases--moderate attrition and calculus, low rates of caries, wear-caused abscessing, and low-moderate rates of AMTL--affects populations subsisting on a mixture of pastoralism or fishing and agriculture (Failaka, Umm an-Nar, Bronze Age Maysar, Bronze Age Shimal, and Iron Age Galilah). Mixed farming populations (Iron Age Maysar and Islamic Bahrain) experienced low-moderate attrition, high rates of caries and calculus, abscessing due to caries, and severe AMTL. The final group of dental diseases affects populations practicing intensive gardening (Bronze and Iron Age Bahrain, and Sites 3 and 5, Ras al-Khaimah). These groups experienced slight attrition, high rates of caries, low rates of calculus deposition, and severe AMTL.