My gelding has EOTRH. He’s 15, and it’s been going on for ~2 years at this point. I first noticed it when he was reluctant to bite into things like apples or carrots, and he started hanging the tip of his tongue out of his mouth. I suggested EOTRH to my vet and she agreed that’s what it was. She did standing sedation right there at the farm for x-rays of top and bottom incisors- bottom looked fine but on top, we could clearly see the damaged and eaten away roots, and the hypercementosis deposits. My vet suggested removing the top incisors stepwise so he wouldn’t have such a huge hole while his gums healed, to help lower risk of infection and complications. He had his two middle incisors out last summer, again with standing sedation right at the farm. The vet just uses a periodontal elevator to loosen the tooth and the ligaments around it and then just pulls it out. You can see on the teeth once they’re out how uneven and painful looking the roots are. And it’s an immediate relief to the horse- mine woke up and right away started eating hay. I flushed his mouth with water and dilute chlorhexidine for a few weeks and he got a few days of bute, and had no issues during the healing process. Since then I’ve been keeping an eye on his teeth and gums to watch for any more inflammation. Right before we pulled those teeth, his gums were red and inflamed, and clearly swollen right around the base of the tooth. I also chip the tartar off the incisors that are left every few weeks- now that there’s a gap in the middle, it tends to collect and bridge the gap on top, and collect food debris. My horse is super good and lets me do anything in his mouth, sweet boy. He had the next two incisors from the middle out a few weeks ago, and same thing- easy recovery, immediately back to eating hay, few days of bute, and dilute chlorhexidine rinses- he’s doing great. He’s still got his bottom incisors and the most lateral top one on each side, and has no problems with 4 less teeth. He still eats normally, has no problem grazing, and looks super cute with the tip of his tongue poking out in front! 
It only cost me a few hundred for each procedure. If your vet is able to do standing sedation on the farm for EOTRH tooth removals, I highly recommend it. My boy is much happier with them gone. The last two on top will probably be coming out in the next few months, and we’ll keep watching the bottom incisors. EOTRH usually only affects the incisors.