Missing teeth are common, often it is the lateral incisors, or lower second molars. Careful assessment is required to ensure the tooth is actually missing, and not developing in the wrong place or is impacted.
When there are true missing teeth, there is often a large gap. Surrounding teeth can then drift into this space resulting in generalised unaesthetic gaps.
Your orthodontist will offer you a range of options that best suit your overall bite, facial features, budget and time-frame.
Missing back teeth can often be disguised by closing the space. Missing front teeth are often managed by opening up an ideal gap to allow a perfect prosthetic replacement. In some cases, the gap can be closed and light polishing teeth of the adjacent teeth is done to improve the harmony of the smile.