Teeth gap issue. I concern for this?

A little more description will be required to understand the problem that you are facing. Which tooth is missing, the central one or second or third or whichever number from the centre????? Do you have an x-ray which shows whether that tooth is formed but stuck in the bone???? Clinical examination will be required to assess the condition and delineating the treatment options for you. Depending upon the condition the treatment options can vary from braces treatment to removable denture or fixed Bridge or implant, but which of these is suitable for you can be explained after the analysis. The cost also vary according to the treatment and the experience of the dentist. You can search for a Cosmetic dentist in your vicinity using Practo. Regards.