All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
There is no sin on you if you remove this tooth and install stents, if necessary since this comes under the instruction to seek medical treatment, which is totally irrelevant to the prohibition on changing the creation of Allah for which Allah Almighty Says (what means): {… and I will command them so they will change the creation of Allah.} [Quran 4:119] It is reported that the pious ancestors have explained this verse as either referring to castration or tattoos. There is a group of scholars who even explained it as “the religion of Allah.” Anyway, seeking medical treatment and removal of harm are not included in this very prohibition included in the verse.
Allah knows best.