Many people are bothered by gaps between their teeth. This can often be fixed very conservatively by simply adding some tooth-coloured filling material, appropriately shaped to close the gap. This is usually done without preparation of the tooth, and the results will look at their best for 5-7 years with periodic maintenance, including repolishing.
Sometimes we can use porcelain veneers as they give a very durable result in the long term.
If the spaces are larger, we may suggest you have some orthodontic treatment, either as the initial treatment before continuing with some restorative work, or as the sole treatment.