How long after an incident can you sue for malpractice?

Question Details: Approximately 14 years ago, I was in a car accident. I got a lawyer and sued. I had multiple dental reconstructions and a total of 22 route canals; they were done by a dentist that was recommended by my lawyer. I know the statue of limitation is up but my current dentist took X-rays and told me that whomever did my root canals need to be sued. The root canals were only partially done and fluid has built up where they would have to drill my gum to drain. When I had first found out, which was years before, I called my lawyer and he said he would look into it but never did. Is there anything I can do now to make them pay to fix my teeth?

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