How can I remove stains? Will whitening strips work? What can I do about this cavity with barely any tooth left? (Photo)

Developing a full wide smile with the DNA Appliance and Epigenetic orthodontics will correct underlying issues that mke you not like your smile.  Ideally a 10 tooth smile radiates.  First, have your dentist restore lower right molar.  Facial composites can instantly give you prettier front incisors.

There are ways to remove the discoloration from your teeth by bonding them and making them look normal.  There are several reasons why you have that kind of staining but rest assured you can be helped! As far as the cavity, that tooth may be able to be restored so you should see a dentist asap.