Caps, gum surgeries, implants, dental exotica – all kinds of things can and do go wrong in retirees’ mouths. But dental coverage also drops sharply for older Americans, because when people retire, they give up their employer’s dental insurance. Without it, retirees needing dental work can face an unexpected, mini financial crisis. Medicare does not cover routine dental procedures, a fact that a majority of working baby boomers are unaware of. But most seniors also aren’t covered through a spouse or under, say, a union dental insurance plan for retirees. The private dental insurance market is their only option for care, and very few purchase it. Uninsured older Americans shell out $1,126 annually, on average, for dental work, which is…