A comparison has been made of the effects on the gingivae of occlusally and gingivally approaching clasps. The effect on the gingivae has been assessed by measuring plaque accumulation, crevicular temperature and microbial distribution in patients and students wearing appliances. Habitual and nil oral hygiene regimes have been used to demonstrate changes. It was concluded that the gingivally approaching clasp is potentially damaging.
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BAZIRGAN et al. (1987) studied this question.
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