A. The cause of your 2 loose teeth needs to be properly diagnosed prior to any treatment.  The possible causes are trauma, gum disease or sever abscesses above the teeth.  Of these gum disease is the most likely.  This can affect the other teeth as well. Once this is treated your options are splinting the teeth together , removing the teeth if severe bone loss has occured and having a denture/bridge or implants to replace the missing teeth.  It is not possible for me to give you a costing unless I was able to give you a proper examination but I hope the above helps.