Comparison of two fluorosis indices in the primary dentition of Tswana children

Abstract
Fluorosis of the primary dentition was determined in 146 children living in a hot, dry African village with a fluoride concentration in the drinking water of 0.98-2.7 ppm. The prevalence of fluorosis was compared using Dean''s (8) and Thylstrup and Fejerskov''s (14) indices. The prevalance varied according to tooth type, being highest in maxillary second molars (25%) and lowest in mandibular central incisors (4.6%). The two scoring systems produced almost identical prevalences of fluorosis but the severity scores varied. Generally Thylstrup and Fejerskov''s index scores were one score higher than Dean''s. The Thylstrup and Fejerskov index is recommended for future studies.

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