passages.id: split_6_test_1981_passage
passages.type: progene_text
passages.text: In our own study on 64 men with idiopathic osteoporosis without prevalent fractures , a low - dose intermittent fluoride regimen ( 15 mg fluoride ions 3 months on , 1 month off ) resulted in an average gain of lumbar spine BMD of 3 % per year and a lower rate of incident fractures as compared with patients treated with calcium only .