Please choose the correct ending to complete the given sentence: Health: [header] How to know when tooth fillings are unnecessary [title] Do not ignore pain or tooth problems. [step] You may come across articles and posts describing an epidemic of unnecessary dental procedures and decide that no dentist can be trusted. However, regular dental care is essential to good oral and overall health, and signs of tooth pain or discomfort should never be ignored.

Ending1: [substeps] Check to see whether there is special time requirement for tooth fillings. Some dentists send back inversions of the procedure daily or are required to wait at least two to four weeks after a tooth is actually suffered. Ending2: Before you sign any of these articles, remember that missing teeth or other symptoms indicate that your dental health has changed or that tooth fillings are no longer necessary. In order to be sure, pay close attention to any pain or discomfort that you feel. Ending3: Visit multiple dentists if you must, but make sure you visit a dentist when treatment is required. [substeps] Only a trained dentist can properly diagnose and treat dental problems. Ending4: Make a list of symptoms that trigger pain. Do not be surprised if you have monthly bone ache pain.

Answer format: ending1/ending2/ending3/ending4