yeklike Sonic Electric U Shaped Toothbrush for Adults, Automatic Full Mouth Cleaning Toothbrush, 360° Stain Removal, IPX7 Waterproof Rechargeable, 3 U-Shape & 2 Straight Brush Heads (White)

["BASS brushing method: is an effective way to remove plaque near the gingival margin and in the gingival sulcus. The toothbrush is held at 45° to the long axis of the teeth to clean the teeth. (Ordinary toothbrushes have difficulty mastering this angle)"]