Hello Mam,this is mostly related to the gum disease where that tartar creates infection In your gums if you have cleaned it to your dentist, then the gums will take time to heal and you have to follow the proper oral hygiene instructions like using your gum paint,mouth wash and proper flossing,
If you feel like the gap is increasing then you have to do something called deep root cleaning depends upon the condition.
Next Steps
add more of fruits and vegetables in your diet eat healthy nuts like Badam which will heal in cleansing your teeth, can Prevent tartar .