Also, even for those who take care of their teeth, like myself, sometimes genetics play a role-I've had two teeth yanked for infections (fillings fell out, I didn't have insurance), and I need some bridgework down. My mother had dentures when she was 18, because she ate too much candy and never brushed her teeth properly (I do, but I still get plenty of cavities).
He was almost what, fifty? That sounds about right. That and he smoked, so yeah, he'd have bad teeth. Poor guy-teeth suck. Ever have an abcess? If not, then pray you never do. Worst pain EVER.