Permanent teeth replacement is essential to overall oral health. Eating, speaking, and chewing are more difficult if you have missing teeth and do not replace them. Over time, your jawbone deteriorates. Your face may take on a sunken appearance. Your remaining teeth will shift because of the empty tooth sockets left behind by the missing teeth.nnGum disease is one of the most significant risks if you do not replace missing teeth. Fortunately, dental bridges can restore your teeth and help maintain your oral health.