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This is the famous Tepe molar toothbrush. At first, I thought this was a cat toothbrush; seeing all the related keywords like "cat" and "dog" pop up, I was like, "Huh?" But I highly recommend it to anyone with weak gums. On days when I have some spare time, I don't use a regular toothbrush and brush with this instead; it does take a really long time... but it's the best for cleaning every nook and cranny of the gums, right between the teeth! My gums tend to swell, bleed, and are quite weak, so they are hard to manage, but they have gotten a bit better since I started using this molar toothbrush. It feels a bit cramped because it's so small, but you will definitely feel a refreshing sensation.