If it were my project...
--physiology of normal bone, focusing on the deposition/resorption of the pertinent minerals and the role of estrogen in the process
--the patho; what goes wrong
--results of the patho explained in part 2 (comparison pictures on a slide for this would look good)
--demographics of patients most likely to get osteoporosis
--clinical manifestations and most common presentations that lead to a diagnosis
--primary prevention (how to avoid it in the first place...I've seen research that indicates the best prevention occurs during the teenage years, and I'm sure you can find references.)
--secondary prevention (screenings, recommended ages, etc.)
--tertiary prevention (medical treatments and nursing interventions)
Keep any text on your slides succinct with just "prompts" for you to do the talking.