A bone density of 4.5 is not necessarily curable; there are some cases that can be treated and some that are not in order to be cured.
A BMD of 4.5 suggests possible osteoporosis. If the patient is young and has secondary osteoporosis due to a specific disease such as hyperparathyroidism or hyperthyroidism, a cure is possible with calcium and vitamin D supplementation after correcting the cause.
In the case of primary osteoporosis, due to aging or lack of estrogen after menopause, cure is unlikely, but appropriate treatment can reduce symptoms, improve prognosis and reduce the incidence of fractures.
If medication is needed, it is recommended to use medication under the guidance of a doctor, not blindly self-medication to avoid adverse effects.