A double-blind, multicenter, international randomised study to assess the effects of 6 months or 12 months administration of 2g per day of strontium ranelate versus alendronate 70mg per week on bone remodelling and bone safety assessed by histomorphometry

To assess the effects of 6 or 12 months treatment of strontium ranelate in comparison with alendronate on bone formation assessed by histomorphometry on transiliac paired biopsies performed in patients with postmenopausal osteoporosis treated for 1 year.