Synthesis of materials that mimic the natural bone have become an objective of many research groups. Mimicking the natural bone composition, where the ratio of inorganic to organic phase is high, still is a challenge. It is well known that hydroxyapatite (HAp) is widely used in hard tissue regeneration due to its biocompatibility, bioactivity and osteoconductive properties. However the poor mechanical properties (brittleness and low plasticity) of HAp biomaterials limit their application1, thus new materials with improved properties are prospected. Introducing a polymer component into the HAp in order to form an organic-inorganic nanocomposite is a method most commonly used to overcome the mechanical weakness of HAp.