gums making me feel worse

Q. hello there i was wondering if you ould help me i have been searching for  a dentist for quite abit now because im loosing my teeth rapidly,i have periodontal gum disease,i have several teeth missing and have a brace with 3 tteth attached,if possible i do not want dentures.what can be done if anything for me,my dentist says i havent enough bone to screw teeth to. is he right or shud i see somebody else ?,