Hello….
if you are not feeling any pain or sensitivity in this tooth then,
You can just go to the dentist and get it restored by composite restoration ,it will take 20minutes and be done in single visit.
And if you feel any sensitivity or pain then get an xray done for this tooth and proceed with a root canal followed by cap which will take a week to complete the whole process ..
Next Steps
Go to the dentist and get it restored.