How do teeth aligners cause teeth movement?

There are very few situations where there is no need to remove some bulk from the tooth to fit veneers. You have large gaps in between your teeth. Your teeth are already thinned down from previous fillings or acid erosion (you must still have enamel covering the tooth surface for predictable long-term bonding). If BOTH of these criteria exist, then it may be possible to have porcelain veneers without much trimming. Trimming tooth structure for veneers achieves 2 functions: Creates an end-stop for the porcelain to end and to allow easier seating of the veneer.

Stains on the tooth surfaces can be caused by: Dietary substances: tea, coffee, red wine, herbal medicines are common causes of brown tooth discolouration. Tobacco: cigarette smoking, tobacco chewing or betel nut chewing (if tobacco is included) can deposit stains. Chlorhexidine is a common antimicrobial compound added to mouth rinses used after dental surgery. Stains can be kept under control using whitening toothpaste that contain abrasives to polish the surface of the tooth. Professional cleaning also uses abrasives to remove surface stains.