Abstract
The purpose of this study was to investigate whether topical application of fluorides prevents plaque formation on radicular dentin after root planing procedures. After removing the cementum of periodontally-healthy third molars with a sterile diamond bur, test samples (5. 5mm) were cut from radicular dentin. The surface of the samples was roughened with waterproof sand paper (#240) to match the surface after root planing. Each test sample was treated with 2% sodium fluoride solution (NaF), 2% and 8% stannous fluoride solution (SnF2) and a saline solution (control) for 4 minutes. Ten patients having a resin temporary bridge due to missing mandibular first molars, were used in this study . Two pieces of sample were embedded into the facial surface (brushing group) and the basal surface (nonbrushing group) of the pontic area with the embedded specimen's surface exposed in the oral cavity for 7 or 28 days. After each experimental period, histological sections were prepared and stained with Gram's stain for light microscopy.
The following results were obtained.
1. The 2% and 8% SnF2 treated groups showed greater reduction of plaque formation than the control group on day 7 in the non-brushing group.
2. The amount of plaque formation on days 7 and 28 in the brushing group was no less than that in the control group.
3. The amount of plaque formation on radicular dentin in the brushing group was significantly less than that in the non-brushing group.
4. This study suggested that 2% and 8% SnF2 applications after root planing will reduce plaque formation on radicular dentin.
