Please provide information about where I might find dental insurance or the means to pay for dental work?

I'm on SSDI and Commonwealth care. My front teeth are badly cracked and ready to break, my bones are weak due to a very severe vitamin D deficiency, a filling came out of my back tooth, and I'm having more trouble. I live in Boston and have heard that most or all dentists who take the health safety net are bad dentists over here. No one I know can suggest a decent one who takes health safety net.