Hello Canadian Family,
Sorry to hear about your daughter, but it is a very good thing that you found out about the osteoporosis when you did. Usually the younger thal children do not undergo DEXA , although there are fractures even with the younger thal children. Getting the DEXA was really good thinking on your part. The fractures in smaller thal children, doctors assume may be happening due to the hb being low and bone expansion, but of course it can be any number of reasons.
Although, what Manal said about taking osteo supplements is a good suggestion, I would like to specify that before starting any osteoporosis medicines that increase bone density, one has to check that the blood calcium level be normal. It is contraindicated to take osteo meds if one has hypocalcemia, and so one has to bring up the blood levels of calcium to normal before starting those osteo meds. Otherwise it will further leach calcium from the bones.
Secondly, nice friend is quite right that a great source of Vitamin D is sunshine. We hear about that all the time. In fact, that is why even very small babies here, are massaged with mustard oil in the sunshine and made to sit in the morning sunshine for an hour.
I have heard that quicker form of osteo med treatment as biphosphonates go, is pamidronate which is given IV. I do not know if it is used with smaller children. Alendronate is a slower acting long term osteo med which is taken orally but it can cause digestive problems. One has to sit up and not move much for at least 30 minutes when you take alendronate... again I do not know of its use with children, esp. since it is difficult to make children sit in one place for even 30 minutes.
Other supplements for Vitamin D and osteo are calcitriol and calcitonin, respectively. You can refer with your doctors as to what all would be suitable. Hope this helps.
It is possible to improve bone health, so please do not worry.
Regards.