Hello, I can understand your concern. According to me the bone loss of the upper and lower jaws that is associated with 15 teeth is a different problem than the problem of sinus and bleeding from nose. Let us discuss both problems separately. Usually, the bone level of jaw is where the crown of teeth (the part we see in mouth) and the roots meet. With age, due to lack of proper oral hygiene, due to presence of systemic illness like diabetes or presence of gum disease, the bone level may reduce in size exposing roots, making gums bleed, and making teeth loose in their sockets. Visiting a dentist for this situation will help as dentist will perform scaling and root planing which will remove the bacteria, calculus and debris in the gums making gums healthier and stronger. You can also massage gums by using gumex gel daily for about 10 minutes. Make sure you mention to dentist about your heart valve problem as some treatment modifications will be required for you. Regarding the sinus problem, it is difficult to examine sinuses properly in an x-ray that is taken by dentist for examining teeth and bone status. Also, the problems you are facing of bleeding nose and previous bone scan presenting bone necrosis indicated towards some sinus problem. However, it is difficult to advise regarding that in absence of bone scan examination right now. Thus, I would advise you to visit an ENT specialist for the sinus and nose bleed problems. I hope this information helps you. Thank you for choosing HealthcareMagic. I wish you feel better soon. Best, Dr. Viraj Shah