First, is there a formal license?
Second, the cost, compared with regular hospitals, is too cheap to be trusted, because the profit will not be too great.
Third, consult other patients.
Fourth, pay attention to sanitary conditions (this is the most important)
1, overall sanitation of the clinic
2. Are all the instruments and doctors' gloves changed by everyone? Are the operations sterile?
(That is, poor workmanship has damaged teeth, and the sanitary environment is not good, and it is not sterile, causing infection and implicating the body.)
I wish you an early health!