| 摘要 |
<p>A toothbrush has an elongate handle and one brushing head. The brushing head is bent at a 90° angle relative to the handle. The bristles project from the brush head parallel to the gripping surface of the handle. The angle enables ease of access to the lingual surfaces of all teeth, especially the anterior teeth. The 90° angle also permits access to effectively clean the distal surfaces of teeth as well as the lingual surfaces of teeth and implants possessing any amount of gingival recession.</p> |
