Gum disease can cause the gum line around your teeth to recede. Over time, your gums may recede enough to expose the roots of your teeth. This also exposes nerves, which can cause discomfort. Cold and hot foods and drinks, and even breathing cold air can be uncomfortable if your roots and nerves become exposed. Exposed roots can also elongate the tooth, giving you an older, less cosmetically appealing appearance. Additionally, some people have naturally thin gum tissue, which increases the chances for gum breakdown over time. Gum grafting procedure works to rebuild gum tissue around your teeth and make necessary activities like eating and drinking more comfortable.