Unwaxed and waxed dental floss were clinically evaluated for effectiveness in reducing gingival inflammation. Two different scoring methods were employed. Both types of floss, when administered by a dental hygienist, were very effective, but no significant differences between them could be found. Both scoring methods led to the same conclusions, but one was more sensitive and provided more detailed information.
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Finkelstein et al. (1979) studied this question.
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