Hi....the gap or spacing between your teeth requires definite orthodontic treatment.But orthodontic treatment will be decided based on ur facial profile,spacing between the teeth nd mainly on radiographic investigationsL(OPG ,Lateral Cephalogram).There are many treatment options.Invisalign is one of the best among them.
Next Steps
Visit orthodontist and get ur correct treatment plan.
Missing teeth replacement also has many treatment options.Visit dentist and get treated properly.
Health Tips
Advised to do regular dental check up and teeth cleaning every 6 months regularly