Clinical and microbiological effects of daily brushing with either NaF or SnF2 gels in subjects with fixed or removable dental prostheses

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Abstract
61 adults, with fixed or removable dental protheses, completed a 6‐month double‐blind trial comparing the clinical and microbial effects of brushing twice daily with either 0.22% NaF or 0.4% SnF2. Those subjects brushing with SnF2 had less gingivitis and fewer bleeding sites for both “total teeth” and “abutment teeth”. Plaque scores between groups were only statistically different for the “abutment teeth”. The microbial parameters, salivary S. mutans and subgingival plaque total CPU, were significantly reduced in the SnF2 group. In both treatment groups, there was a reduction over the course of the study in the number of subjects with recoverable A. actinomycetemcomitans and black pigmented bacteroides. yet there was no difference between groups.