Teeth to be extracted for orthodontic reasons were filled in vivo with regular and fine-cut silver amalgams containing 1% and 5% SnF2. The teeth were extracted after 15 or 30 d, and the in vivo fluoride release and uptake by the dental tissues were studied using an electron microprobe analysis technique. The obtained results show that the use of SnF2 silver amalgams can be of potential value for minimizing caries adjacent to dental restorations.
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