Based on function:
* Teeth: This is the most general antonym, as fangs are a type of tooth.
* Incisors: If you're specifically thinking about the sharp, pointy nature of fangs, incisors are the front teeth used for biting.
* Molars: If you're thinking about the crushing/grinding function of teeth, molars are the teeth at the back of the mouth.
Based on connotation:
* Canines: This is a more neutral term for the pointy teeth in the front of the mouth.
* Gentle: If you're using "fangs" metaphorically, "gentle" could be an antonym to represent kindness or harmlessness.
* Non-threatening: This could be used to describe something that doesn't pose a threat or danger, as opposed to something with fangs.
Ultimately, the best antonym for "fangs" will depend on the specific context in which you are using the word.