What causes the teeth to shift my top teeth are to the left more then they use to be when i look in the mirror i have bad teeth and i do grind my teet?

Call a dentist: There are a variety of reasons that teeth shift-genetics, age, grinding, bad habits and missing teeth. The loss of a tooth or a contacts between the teeth due to the tooth decay will create the movement of the adjacent teeth. The good news is that can all be fixed. Rec. : call your dentist for exam and x-rays.

Malocclusion: Most common cause is malocclusion, often with damaged teeth and/or damage to the supporting gums/bone. Check in with your dentist and also ask if referral to periodontist and/or orthodontist is in order.