It seems like you have teeth mobility in upper arch and a thin crest of maxillary ridge.It also depends on which type of artificial teeth you desire, fixed or removable.If you want removable teeth the missing teeth can be replaced with RPD(removable partial denture).If you desire fixed teeth ,In case of thin ridges I have placed implants by ridge expansion procedures and by bone augmentation procedures.The loading time for these procedures is usually longer ranging from a minimum of 3 months to 1 year but it gives excellent results.
Next Steps
Refer to a Prosthodontist
Health Tips
Find out the actual reason for your tooth loss and take adequate precautions to preserve your remaining teeth from falling.