Generally, interdental brushes come in three types: straight-handle, angled-head, and curved-handle. Straight-handle brushes are suitable for people with wider gaps between their teeth, while angled-head and curved-handle brushes are better suited for those with narrower gaps. Additionally, these brushes come in various sizes-such as large, medium, and small-so you should select the size that best fits the gaps between your teeth.
Next, consider the materials and the quality of the bristles. The handles and bristles are typically made of plastic or metal; plastic is relatively lightweight, whereas metal is sturdier and more durable. Bristle quality is also crucial; opt for bristles that are as soft as possible to avoid damaging your gums.
Finally, consider proper usage and maintenance. It is important to use the brush correctly to avoid harming your teeth or gums. After use, the brush should be thoroughly cleaned and allowed to air dry to prevent bacterial growth. You should also replace the brush regularly-typically every three months.
In summary, selecting the right interdental brush involves considering several factors, including the type and size, materials and bristle quality, and proper usage and maintenance.

