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The research of bone tissue engineering bases on three basic directions of seed cells, scaffold materials and growth information. Stem cells have been widely studied as seed cells. Human urine-derived stem cell (hUSC) is extracted from urine and described to be adhesion growth, cloning, expression of the majority of mesenchymal stem cell markers and peripheral cell markers, multi-potential and no tumor but stable karyotype with passaging many times. Some researches proposed that hUSC might be a new source of seed cells in tissue engineering because of their invasive and convenient obtention, stable culture and multiple differentiation potential.