the simple answer : osteoporosis is the demineralization or thinning of bone often seen as people age. this can make them more prone to fractures (breaks) from even minor injuries or no injuries at all. scoliosis is a term pertaining to an abnormal curvature of the spine often first detected at puberty in both boys and girls however if an older person had osteoporosis of the spine this could cause an abnormal curvature (scoliosis). so a person could have both. for more a detailed explanation of these two terms a search of webmd's massive data bank will reveal several different articles and citations for each of them.
what is the difference between osteoporosis and scoliosis?