It's important to repair a broken or bad tooth because this can prevent plaque buildup and cavities in the tooth and the surrounding teeth. Some teeth can't be repaired and must be replaced. This can give you more surface area to chew with and relieve stress on your other teeth. With any kind of restoration procedure, the treated tooth benefits a lot, and surrounding teeth benefit too. Tooth restoration can be essential for your dental health, and dental health can be vital for your overall health. In fact, good dental health can help prevent gum disease and decrease your risk of stroke or heart attack.