I had my 4 front teeth extracted 30 years ago, and I now want dental implants. I do not have sufficient bone in that area. Do I have to have bone taken from my jaw or other parts of my body, or is there a bone substitute that could be used. I know that impants can be costly, but my confidence has taken a beating with having to wear a denture first and then a fixed brace, which envolved stripping my 2 canines to use as the anchor teeth. I am female and in my early 50,s. I would really appreciate your reply and thank you for your time.