Stem cells likely play key roles in the repair of diverse injuries or disorders in body. Recent advances in biotechnology and regenerative medicine brought a revolutionary change in the practice of medicine. Advancements in stem cell biology, including embryonic and postnatal somatic stem cells, have made the prospect of tissue regeneration a potential clinical reality. Absolute concept for the use of stem cells in bone disorders has been centered on the strategies for reconstructing segmental regions of the skeleton, lost to trauma or surgery, and in muscle diseases, to provide normal population of cells in order to replace defective tissue.