Teeth Distorted and inside mouth is missing

I made this sim a while ago, he's a genetic makeup of his parents. I noticed his jaw was missing and his teeth distorted, I thought it was just something wrong with his teeth and thought changing it would fix it but no matter what teeth I chose it still stayed the same. I continued to play with him and his family cause they are side characters. Well him and my main character feel in love when they were teens, still didn't mind the distorted teeth because in my mind they weren't going to be together forever and she was going to end up with someone who had a better set of teeth 😅. After weeks of me plotting to break them up he autonomously proposed, I wasn't given the option to decline and now i've got a wedding to plan 🙃. I want him to have a good set of teeth on his wedding day, please someone help me😂

He's the only one who's teeth is like this in my game, I've repaired my game multiple times, and well as going through my mods folder to remove broken cc that was on him, and he still looks like this.