Biomedical subjects
B D Richardson
Publications and source records attributed to B D Richardson.
Sweets, snacks, and dental caries: South African interracial patterns.
Sucrose has been thought to cause dental caries; sweets and snacks being primarily responsible, together with plaque and their respective interactions. Dietary questionnaires revealed that in 3 to 5 yr olds, protein in black, colored, Indian, and white groups provided 12 to 15% of total intake, fats 10 to 17%, and carbohydrates 69 to 78%. At 16 to 17 yr old, patterns remained essentially similar. Sucrose provided about one-quarter of intake, sweets and snacks less than one-tenth, but dental caries prevalence increased rapidly from black to white. This raised several questions regarding current concepts of caries causation. Are genetic, immunological and other dietary factors also responsible for caries levels experienced?
Dental caries in Coloured and Indian children aged 1-5 years.
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The problem of malnutrition in South Africa.
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Assessment of the nutritional status of children.
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Malnutrition and nutritional anthropometry.
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Mortality rate of black infants in Soweto.
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Fluoride and leg abnormalities in children.
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Serum albumin and protein energy malnutrition in black preschool children in Transkei.
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Patterns of oral hygiene and dental caries in urban and rural South African preschool children.
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Breast versus bottle feeding.
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Dental caries in South African white children aged 1-5 years.
The dentitions of 499 white preschoolchildren aged 1-5 years from a low fluoride area were examined with mirror and probe. The dmft values ranged from 1.0 +/- 2.0 at 1 year of age to 5.1 +/- 4.5 at 5 years of age while the overall mean for the group was 3.7 +/- 4.1. ""Rampant" caries prevalence varied according to the definition used. It is suggested that for epidemiologic studies rampant caries should be defined as a dmft value of 5 or more and that labial caries should be regarded as a specific entity.
Dental caries in rural and urban black preschoolchildren.
The dentitions of 439 rural and 192 urban black children aged 1-5 years were examined with mirror and probe. Dental caries was common and the percentage prevalence and dmft values were similar in children of 1-3 years in both groups. At 4 years of age there was a twofold increase in dental caries in the urban children to reach a dmft score significantly greater than that in the rural children (P less than 0.01). Labial caries was common in rural children but rare in urban children while rampant caries (dmft greater than or equal to 5) exhibited the opposite pattern.
Total sucrose intake and dental caries in black and in white South African children of 1-6 years. Part I: sucrose intake.
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Total sucrose intake and dental caries in black and white South African children of 1-6 years. Part II: dental caries and sucrose intake.
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Growth, school attendance, and serum albumin levels in South African black children of 10-12 years.
Studies on representative series of South African Black schoolchildren aged 10-12 years revealed the following. (1) In the age sex groups, mean proportions lying below the Boston 3rd percentile of weight for age were high (a very common phenomenon), ranging from 20-84 per cent. (2) Of total moieties above and below the 3rd percentile, 96 per cent and 95 per cent had normal weight for height (more than 80 per cent of the 50th percentile of reference standards). (3) Both moieties had equally excellent records of school attendance, 94 per cent and 93 per cent. (4) Mean serum albumin levels, also the proportions having relatively low levels, did not differ significantly, either in the respective subgroups above and below the 3rd percentile, or in groups of pupils accustomed and not accustomed to supplementary school-feeding. Accordingly, it is considered that classification, without qualification, of schoolchildren as malnourished simply because of slower growth compared with western norms is unwarranted.