Outliving your teeth

Despite conscientious flossing and toothbrushing, it seems I'm getting too old for my teeth. I spent a good part of the morning at the dentist, and it wasn't good news. "But I work so hard at it," I whined at him, when he told me I probably will need a root canal.
To add insult to injury: My puny dental insurance pays a laughable amount. My portion is about eight or nine times what Cigna dishes out. Why do they call it dental insurance then?!