Is it possible to get dental bone grafting to add height for dental implants?

I had 5 teeth extracted about 5 years ago and the dentist I recently saw said my jaw bone is not enough to get implants so I asked him about bonegrafting and his reply was there is nothing you can do when there is not enough height in the bone..I was so surprised and upset..I said with all the new stuff they have out these days there is nothing they can do for height?He said no..I have a feeling that is wrong because I have read that you can fix height..Am I right?