Browsing by Author "Vorster, Lesley Ross"

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    Economics of the South African toothpaste industry
    (University of Western Cape, 2019) Vorster, Lesley Ross; Naidoo, Sudeshni
    Introduction: Untreated caries of the permanent dentition is the most prevalent condition worldwide. Ongoing globalisation and the heightened exposure to a refined, westernised diet against a backdrop of deficient health services and inadequate implementation of preventive public health measures, means that dental caries remains pervasive, especially in emerging economies. In South Africa, an estimated 90% of caries remains untreated, disproportionately affecting the poor and detrimentally impacting on the economy. The use of an effective fluoridated toothpaste is regarded as the best clinical practice available today in caries management. Aim: The aim of the present study was to evaluate the availability, pricing and affordability of fluoridated toothpastes marketed to South African households and to identify mechanisms to improve financial access among low-income households. Methods: A cross-sectional survey of fluoridated toothpastes, retail price and unit weight/volume was undertaken. Following calculation of a median reference price for each paste, affordability relative to household income brackets was assessed using a modification of the WHO/HAI’s essential medicines pricing protocol. Affordability was expressed in terms of the number of days of disposable household income required to purchase the annual, household therapeutic dosage of a fluoridated toothpaste. Results: Despite the wide availability (n=142) of fluoridated toothpastes, of those assessed for affordability (n=130), none and 49% were affordable to households located in the first and second lowest income brackets, collectively termed low-income earners. Accessibility (±96%) increased sharply for low emerging middle income households and upwards. In general, as household income declined, the proportion of daily, disposable income required to purchase the annual, household therapeutic dosage increased. Households located in the lowest income bracket spent 104.3% of daily income on the annual dosage of the lowest priced toothpaste in contrast to 0.23% spent by the wealthiest households. Horizontal disparity in terms of affordability between household income brackets differed significantly (p<0.00001). Conclusion: Stark inequity in affordability of fluoridated toothpastes exists between low income and affluent households with dire implications in terms of oral health and economic hardship suffered by the poor. To redress this social injustice, a number of price regulatory policies and funding mechanisms are suggested to stimulate dialogue and urge all relevant entities (clinical, legal, industrial, and governmental) to take action urgently.
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    Total and bioavailable fluoride concentrations in commercially available toothpastes in South Africa
    (University of the Western Cape, 2015) Vorster, Lesley Ross; Naidoo, Sudeshni
    High caries burden coupled with a lack of water and salt fluoridation make it imperative that toothpastes marketed to the South African consumer demonstrate adequate caries inhibition. It is generally accepted that an effective toothpaste contain between 1000ppm and 1500ppm total fluoride (TF) and that of this at least 1000ppm F should be in free available form. Studies conducted in other countries have demonstrated that toothpastes often do not conform to this regulation, indicating the need for quality assessments to be undertaken. Objectives: This study therefore aimed to determine total and free available (potentially bioavailable) fluoride concentrations in 28 adult, fluoridated toothpastes marketed to the South Africa consumer. Labeling practices were also assessed. Materials & Methods: Convenience samples were purchased from a major pharmaceutical and food retailer located in each of the five metropolitan areas of South Africa. Information detailed on the packaging was evaluated for compliance with national standards. Total and bioavailable fluoride concentrations were determined potentiometrically, in quadruplicate, following acid hydrolysis of the samples using a Combination Fluoride Ion Selective Electrode, calibrated with standards containing 0.0625ppm F to 6.25ppm F. Results: Although TF content on analysis was found to be statistically significantly lower than manufacturer declaration (1.2x10-7; p≤0.05), 78.6% still contained adequate free, available F levels. Relative mean available fluoride content for toothpastes formulated with a calcium-based abrasive was 85,5% as opposed to 98.7% for those containing silica. Partial alignment with national labeling statutes was observed for all toothpastes. Conclusion: Most commercially available toothpastes are adequately formulated to provide anticariogenic activity, but consumers should be advised against the use of products containing calcium. Improvements to national standards and stricter regulation of labeling practices are required.