Hello, if you have cracked teeth, the main treatment principle is: 1. Treat etiology, adjust traumatic bite force, adjust sharp cusp, balance the burden of bite force, and diagnose and treat dental diseases in other parts. 2. Symptomatic treatment, when complications occur, the corresponding treatment. 3. prevent division. Before root canal treatment, the affected teeth should be treated with root canal shrinkage, and the cracks in the crown should be polished and bonded with composite resin to prevent the crown from splitting during root canal treatment. Full crown restoration should be done in time after root canal treatment.