Weak teeth with spaces...
First of all your dentist has to tell you if your teeth look good on the X-rays. If yes you can go ahead and have crowns on your teeth. However, if your teeth are affected, like deep decays, bone loss, in other words not restorable than extractions will be the last resort.
If your diabetes is under control you can have implants placed or partial denture or bridge. That depends on your overall healthy existing teeth.
Dr. Cristina Barba