Method and apparatus for assessing the penetration of tooth cleaning elements in the gingival pocket US 8381571 B2 Method and device for measuring the efficacy of plaque removal US 20100280793 A1
Determining gaseous component of dialysis DE 9919572A1
Handheld toothbrush US 7146675 B2 Tufting for a Toothbrush Head US D507114 S1
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