Bone Loss In Gums What Are Systemic Diseases That Cause Alveolar Bone Loss?

What are systemic diseases that cause alveolar bone loss? - bone loss in gums

I was slowly losing the jaw bone for many years. I have gum disease. My dentists are perplexed. Despite Getting my teeth cleaned 4x per year, not in a position to control them. I have a big gap, but X-rays there are no signs of traumatic occlusion. Recently I saw an endocrinologist, to explore the systemic causes of bone loss. So far I have ruled out sarcoidosis and osteoporosis. Are there other diseases that need to be tested for? I knew I had vitamin D deficiency, so I take supplements of vitamin D. No signs of inflammation of the gums. They are pink and firm.