Brushing the Right Way: Building Lifelong Hygiene

Most people are brushing for too long with too much pressure, in the wrong technique. Here is the method I teach in chair, with the science behind it.

A 28-year-old patient sat in my chair last week, brushing twice a day for three minutes, with a hard-bristled brush and a heavy hand. She also had 2 mm of gum recession on her upper canines, abrasion notches on three premolars, and bleeding on probing at six sites. She was brushing more than most people I see, and her mouth was paying for it. Brushing is not a quantity problem. It is a technique problem. The technique I actually teach The modified Bass technique. Brush head angled at 45 degrees to the gum line, soft bristles, small vibratory movements followed by a sweep towards the biting surface. Two minutes total, divided into four quadrants of 30 seconds each. Light pressure — a Cochrane systematic review on toothbrushing methods, updated in 2014, found no clinical advantage to harder pressure, and consistent evidence of soft-tissue damage from over-brushing. If you can hear the bristles scrubbing, you are pressing too hard. The sound of correct brushing is almost silent. Manual or electric — the honest answer The Cochrane review on powered versus manual toothbrushes, most recently in 2014, found a small but consistent advantage for oscillating-rotating powered brushes in plaque reduction and gingivitis at three months. So I tell patients: a powered brush is helpful, but a powered brush used wrongly is no better than a manual brush used well. What matters more than the brush: Soft or extra-soft bristles, replaced every 8 to 12 weeks or sooner if frayed A pea-sized amount of 1,450 ppm fluoride toothpaste for adults Spit, don't rinse — leaving the fluoride film on the teeth is the whole point Two minutes minimum, with all surfaces covered, including the lingual of the lower incisors and the buccal of the upper molars What brushing does not do Brushing cleans roughly 60% of tooth surfaces. The remaining 40% — the contact points between teeth — is reached only by floss or interdental brushes. The Cochrane review on interdental cleaning, published in 2019, showed that interdental brushes outperform floss for plaque reduction in patients with open embrasures, while floss remains the choice for tight contacts. If you have never been sized for interdental brushes, you are guessing. Sizes range from 0.4 mm to 1.5 mm in the colour-coded TePe range, and most adults need at least two different sizes for different spaces. I fit them in chair at hygiene visits. Commo…

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