Well older people for some reason don’t care so much about their teeth anymore, they feel sorry for the money to fix them, so your gift is very nice. Your grandfather will thank you for the rest of your life, so you’re a good grandson. Well I don’t know how bad your grandfather’s situation is there, maybe a dental restoration would help him. It’s a good surgery that will help restore his teeth like they were when he was young. They will be strong and white. I just know myself, since my brother is a dentist, he sometimes does these procedures. It’s not too expensive, so I think you’ll be able to afford it. But the most important thing about this gift is that Grandpa himself would agree to it, because for example my grandpa is mean, he might not agree.