Hello mam, Firstly we will have to analyse the condition clinically and also through radiographs . After that we can decide what the treatment has to be done . Mostly for tooth movement the treatment is orthodontics .

yes its possible to correct a single tooth cross bite correction using a removable or fixed appliance......consult a nearest orthodontist for further evaluation. filling may not being a ideal option for such cases.

Hello. First of all we need to know the reason of intrusion of your tooth if it's due to some traumatic injury then u first have go for xrays to check any fracture to the tooth. If this is not the case then sure you can go for esthetic anterior restoration (filling) to make it equal to adjacent tooth. I hope it answer your query.

If your tooth is little inside compared to adjacent tooth, then you can go for composite veneer on that tooth other than orthodontic treatment.