Visit dentist /pedodontist for further clinical examination & radiographic investigation to evaluate the exact condition of root of the milk teeth i.e whether resorbed or not . & get it extracted if the roots of milk teeth are in a good condition.
Also , I noticed ,there is deep cavity in the molar tooth of lower jaw of left side .get it corrected by treatment as per the examination.
Next Steps
visit dentist / pedodontist for further clinical examination, radiographic investigation & treatment
Health Tips
use fluoride containing toothpaste for brushing using proper technique 2 times daily on a regular basis with pea size amount only for maintaining oral hygiene of the child.
Thanks!