Need some dentist's opinion for my 8 yr old kid's xray and treatment plan. He was going to dentist for regular cleaning and didn't go last year due to pandemic. He had his cleaning recently and the dentist spotted cavities on his teeth. He said that has to be immediately filled and he suggested something like coating on other few teeth to protect the teeth and prevent cavity(he said it leaves as it is and doesn't get bigger). He said some abbreviation like Sdf for this coating. I got the treatment plan from the dentist. I would like to know the professional opinion for these x-rays and treatment plan.