My horse has had two extractions. One was an extra tooth that was growing in the front with his incisors. It was very small but was making a red mark on his upper gum and slowly pushing the other teeth, so the dentist removed it.
His other extraction was his lower right canine. He (at some point) cracked it deep underneath the surface and it got infected. He never really showed any symptoms, but when the dentist opened up his mouth he could squeeze pus from around the base of the tooth and it really smelled. I felt like a horrible owner for missing it, but it would be almost impossible to see without cranking his mouth open and looking with a flashlight.
It took a lot of sedation and a lot of sweat to get that tooth out (the canine is a difficult tooth removed because it’s curved into the jaw bone.) Once it was removed, he was on SMZs for 3-4 weeks with daily tooth hole flushings. I used a very diluted betadine mix (diluted with warm water.) I had a big dosing syringe with a long soft plastic tip so I could really get into the hole and flush it clean. I would push his lips open and hold his jaw, flush a few times with the mixture, then flush a few times with plain warm water. I did this 1x/day for about a month.
Their mouths heal really fast. The hole went from a deep ragged cavernous pit to being filled in, flat, and healthy pink by the end of his treatment. I took photos every couple days and sent them to his dentist to make sure it was healing correctly. This was maybe 3-4 years ago, and he’s had no issues since.
It can be stressful to watch as an owner because there’s a lot of cranking/pulling/etc. just a heads up! They are fine, but it can be nerve wracking to witness.