Bone & gum reduced on left upper canine, its slightly lose when you forcibly move it with your finger, can it be saved? (Photo)

Firstly, it needs to see your tooth condition or a  x-ray to recommend any treatment. If your tooth is badly infected then it is good to pull out the tooth. 

Thank you for your question and pictures. It's difficult to provide a diagnosis without reviewing your X-rays.  Discoloration (tooth turning gray) is not caused by anesthesia.  Changes are you had a previously placed amalgam restoration in that same tooth.  If that was the case,...

Thank you for your question. Depending on your treatment goals there are couple of things that can be done. If pointy appearance of your canines visible from the front is your only concern, definitely stay with the most concervative option of composite bonding....