Thanks for sharing your concern.
Your history says your no.2 tooth is missing that is your lateral incisor.
Filling up gaps between teeth can be done only after clinical evaluation. Based upon the space available in the arch.
If the space is less than 1mm then cosmetic build up can be planned.
if there is more space enough for a tooth to fit in then it can be closed by prosthetic tooth replacement. That is your crown.
Prosthetic teeth are of of 2 types , either and implant based tooth that is embedded in the alveolar bone surgically or you can go for a bridge, connecting the adjacent teeth to fill up the space.
so you can get any of the above options done, visit your dentist
get an x ray
done this will help you to understand, if your adjacent teeth are strong enough to bear the bridge, also alveolar bone morphology can be seen for implant (if required). Talk to your dentist about it.
Hope this helps you , take care