Hi I Have My Jaws Locked Since 7-8 Years Because

Hi i have my jaws locked since 7-8 years because i was using tobacco chewing. now i left as i feel one of my front lower tooth is loose. it looks i have gum reducing in few of my teeth. i m doing opening jaw excersises also have Lycovit and AtoZ tablets since a week.

I am very scared and dont want to loos my tooth. please suggest. I visited to doctor. they said treatment is new tooth implant.