You have a number of choices to replace a tooth here, but a great first step is getting a dental implant. These are designed to replace the roots of missing teeth and to support dental restorations (such as crowns and bridges). Having implants can help you feel more confident about your smile and your ability to eat the foods that you love.
Without implants, you also can consider a traditional dental bridge, which is bonded to your existing teeth. Partial dentures can fill the gaps in your smile as well. They are held in place by hooks that attach to your remaining healthy teeth. Full dentures are available if you need to replace all of your teeth.