whole bone to changing mechanical stresses. The bone cell activities consist of osteoclastic resorption and osteoblastic apposition. Physiologically, both actions are almost balanced. In states of high remodelation (bone) turnover, both, resorption and bone formation are higher than normal, but the bone osteoclastic resorption predominates. The result of this situation is loosening of bone mass. The lower bone mass is cause of diminished mechanical competence of bones and higher risk of fractures. Paget’s disease is one of many examples of enhanced bone remodelation turnover. Formerly the therapy of this disease had low efficacy, but with appearance of new antiresorptive drugs the perspectives of the treatment outcomes of the disease are very good. This article presents spectrum of the new antiresorptive drugs, such as calcitonin and bisphosphonates. Dosages, side effects and criteria of efficacy are presented, mechanisms of their actions are explained.

        Key words: bone remodelation, bone resorption, bone apposition, calcitonin, Paget’s disease, bisphosphonates.