Either wait and watch & if still the problem persists ask your dentist to please seek opinion from any specialist.
Next Steps
If possible post your X-ray and other reports.
Health Tips
Court case can give you compensation only in case there was s any negligence on part of doctors. It’s not going to give you relief, rather more stress. In my opinion please consult him again and ask him to provide the solution to your problem. What Best could be done now ?