Dear Patient, Welcome, and thanks for sharing your concern I went through your query, your osteoporosis is natural, as you have paraplegia, where due to muscle paralysis, the bones become weak, moreover the arthritis would also be due to disuse and age. There are a number of drugs available, which are useful to prevent osteoporosis for getting any further worst, and some improvement in the bone mass can be obtained. you should ask your doctor for those drugs, I suppose your doctor will write you those drugs once your surgery is over. I hope my advice would have been useful, in decision making regarding your treatment, still if you have any clarifications or doubts feel free to contact back. Thanks