Transfiguration of Diet and Reduction of Jaw Development in Australian White and Aborigine

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To confirm the effects of rapid transition of eating behavior on the jaw growth and the dental diseases in modern people, the adults (around 50) and the adolescents (high-teens) of both Australian white and aborigine who live in Perth, Western Australia were investigated. Numbers of subjects were 175.1. Dental diseasesThe average numbers of present teeth were 22 to 23 in the white adults, while they were 12 to 16 in the aboriginal adults. However, the average numbers of intact teeth were almost the same in both races. In the adolescents, the average numbers of present teeth were larger than those in the adults and there were no differences among both races. The periodontal indices were lower in the adolescents. But the aboriginal groups showed the higher indices in both generations.2. OcclusionIn the white adults, the normal occlusion were only at 35 to 40%, and the rest were the malocclusion such as the upper protrusion, the anterior cross bite and the crowding. In the aboriginal adul … More ts, the normal occlusion were at 73 to 75%. In the white adolescents, the normal occlusion were at 41 to 57%, including the orthodontically treated normal occlusion. In the aboriginal adolescents, the normal occlusion were only at 38 to 50%, and the rest were the upper protrusion, the anterior cross bite, the crowding and the open bite.As the pathogenic factors of malocclusion, the incidences of the discrepancy and the functional factors were less in the aboriginal adults. In the younger generation, however, those incidences were higher in both races. The degree of tooth attrition were grater in the aboriginal adults, and less in the younger generation.3. DietsAboriginal diets were generally higher in saturated fat and cholesterol than caucasian diets. Percentage of energy intake derived from carbohydrates, both simple sugars and starches, was similar for both races. However, caucasian males had a higher total intake of all forms of carbohydrate. The distribution of energy between macronutrients in aboriginal diets was similar to that in the national dietary surveys conducted 5 to 10 years ago. Less