Peg lateral incisor describes a condition where the second tooth on either side of the upper front teeth does not develop correctly and is small, often pointed, and 
looks like a cone.
Because upper lateral incisors play such an important role in the appearance of your smile, peg lateral incisors receive a great deal of attention. Your dentist can determine the best treatment for any misshapen teeth and is uniquely qualified to restore a peg lateral incisor to give you an aesthetically pleasing smile.
Dental veneers can be made from porcelain or from resin composite materials. In this case we used porcelain veneers to modify the shape of the teeth . Veneers are the treatment of choice for teeth that are relatively intact but may be misshapen, discolored, or chipped. Veneers are thin shells of porcelain that are internally etched and then bonded to the enamel of the teeth.
Porcelain veneers resist stains better than composite veneers and better mimic the light reflecting properties of natural teeth. You will need to discuss the best choice of veneer material for you with your dentist.
If it must, only a small amount of tooth structure would be removed to make room for the porcelain veneer otherwise no preparation or cutting of teeth is possible in selective cases where it is not interfering with the bite (occlusion) or it doesn’t make the tooth looks too tooth big and bulky. With the Digital Smile Design we could easily be achievable. The veneer must be on the enamel so that this veneer has high survival rates when bonded to enamel and provide a safe and predictable treatment option that preserves tooth structure.
It is important to note that survival rates of 99% for veneers with preparations confined to enamel in a restorative and 94% for veneers with enamel-only margins was observed in a retrospective study evaluating porcelain laminate veneers up to 12 years. Despite these high success rates, the authors also reported that laminate veneers bonded to dentin and teeth with preparation margins in dentin were approximately 10 times more likely to fail than when the veneers were bonded to enamel . So, the less your dentist prepared the tooth and in enamel, most likely the bonding strength is maximized . It is definitely not like preparing for a crown or cap. We also usually use porcelain veneers to improve the appearance of teeth and to even close spaces or gaps between teeth.
Here’s the video of this case.