The modified bass technique aims to clean where plaque hides most, right along the gumline, while protecting the gums. Plaque is the sticky film of bacteria on teeth. The gumline is the edge of the gum around each tooth. The gingival sulcus is the shallow groove where gum and tooth meet.
How to do it
Angle. Place a soft toothbrush so the bristles point toward the gums at about a 45 degree angle. This helps the bristle tips reach just under the gum edge, where plaque often starts.
Vibrate. Make tiny, gentle back and forth or small circular movements without scrubbing. Work on two or three teeth at a time for a few seconds. Gentle pressure is enough to let the bristle tips reach into the sulcus.
Sweep. After the small movements, sweep the bristles away from the gums. This lifts and removes loosened plaque. Think angle, vibrate, sweep.
Go tooth by tooth. Move around the mouth so you do not miss any surface. For the inside surfaces of the front teeth, hold the brush more vertically to reach the narrow space.
Biting surfaces. On the chewing surfaces, use short strokes to guide bristles into the pits and fissures.
Electric toothbrushes. The same steps apply. Angle the head toward the gums, guide it slowly, and avoid pressing hard. Let the brush do the vibratory work.
How long and how often
Two minutes is a clear and workable rule for a full mouth clean. Brush at least twice a day. Floss or use interdental cleaners as well, since the brush alone cannot fully clean between teeth.
What brush to use
Choose a soft bristled brush. It removes plaque while reducing the risk of gum damage and abrasion of tooth surfaces.
Key idea
Short, targeted movements at the gumline clean more effectively than wide scrubbing. Gentle technique protects the gums while keeping plaque under control.
Cochrane Library, Powered or electric toothbrushes compared with manual toothbrushes for maintaining oral health – 2014
A systematic review found that powered toothbrushes reduce plaque and gingivitis more than manual brushing in the short and longer term. The size of benefit is modest and clinical importance varies by person, but the evidence supports powered brushes when used correctly.
American Dental Association, Toothbrushes – 2022
ADA guidance explains correct brushing basics, including placing the brush at a 45 degree angle to the gumline, using short gentle strokes, tilting the brush vertically for the inner front surfaces, and choosing soft bristles. These points align with the modified bass steps.
Clinical Oral Investigations, Manual toothbrushing techniques for plaque removal and gingival health, a systematic review – 2024
This review describes common techniques, including bass and modified bass. It notes that instructions often vary between sources and that high quality evidence comparing techniques is limited, so consistent, gentle technique around the gumline is key.
Journal of Family Medicine and Primary Care, Comparison of modified bass, Fones, and normal brushing techniques in young adults – 2020
A randomized trial compared three methods and reported better plaque control with the modified bass method than usual brushing and Fones in parts of the study period. The authors also note that findings across studies are mixed and more research is needed.
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