Namaste, These are empty spaces in between the teeth left after removal of the tartar & will get back to normal on its own due to natural healing capacity of the body.

Hello, scaling should be done at every six months along with proper brushing and flossing . As per the photo you shared it looks like a normal space present between two teeth . There is no need to worry earlier these gaps were occupied by the calculus present in the mouth so when you got it removed by cleaning process it looks like this only which is totally normal.