Best treatment i would suggest is consult a dentist about orthodontic fixed or removable braces for closing space between teeth.

Space between teeth can be corrected by three ways. 1. Braces : we  close the space by using wires and braces.it takes minimum 3 months to close the space. Pros : your natural teeth are not cut Cons : treatment duration 2. Composite laminates : it's a bonding material which is used to  close the space. Pros : cost effective and less time consuming Cons: longevity is relatively less 3. Ceramic laminates/ caps : this involves grinding your natural tooth to create space for caps/ laminates. Pros : superior esthetics and less time consuming Cons : natural teeth might be cut