There is a certain amount of tooth wear that is expected as we age. Excessive acid, bad bites, even emotional stress can contribute to excessive wear--making teeth shorter and even thinner. It happens gradually over time so that you don't notice it, but when excessive, it will make you look older than you actually are chronologically. Restoring them will provide you with a more youthfull smile. The change can be dramatic and most people even require a few weeks to adjust to the new feel, but a fuller brighter smiler always makes you look more youthful. The restorations also strengthen the weakend enamel and provide better protection for the underlying nerves.