Fluoride after chlorhexidine gluconate treatment?

In Short, YES. However, placing a sealant requires conditioning a tooth with a mild acid - often called "acid etching". A tooth that has just received a Fluoride treatment may sometimes require a...

it is as an anti bacterial & dis disinfectant which can help you to have clean teeth

Yes, I think it is necessisary because it will help develop healthy oral habits and prevent later problems..

It is beneficial for up to 6 months.

The typical fluoride treatment today takes 1-4 minutes. However, research has shown that fluoride uptake in the enamel continues up to 30 minutes. By avoiding food or drink for 30 minutes you...