Gingival Microcirculation Response to Tooth Brushing Measured by Laser Doppler Flowmetry

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<jats:p>T<jats:sc>his study quantified changes</jats:sc> in blood flow following tooth brushing, using laser Doppler flowmetry (LDF). Twenty subjects had polysiloxane Stents fabricated with openings to permit placement of the LDF probe on the mesial papillae of 6 teeth. Probing depth, plaque index, and gingival index were recorded and subjects instructed in brushing. LDF initially recorded a 30.second baseline blood flow. The stent was removed and subjects brushed the site for either 3 or 10 seconds. The stent was repositioned and recordings again taken, followed by a control reading. The process was repeated 4 weeks later. Correlations between baseline and control readings were 0.585 (<jats:italic>P</jats:italic> < 0.001) at the first visit, and 0.654 (<jats:italic>P</jats:italic> < 0.001) at the return visit. The mean control blood flow was 156.4 perfusion units. The 3 and 10 second brushing increased the mean value 22.6 units and 21.2 units respectively (both <jats:italic>P</jats:italic> < 0.001). Tooth brushing for both 3 and 10 seconds significantly increased gingival blood flow in the papillary gingiva of healthy individuals. <jats:italic>J Periodontol 1997;68:990–995</jats:italic>.</jats:p>

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