Outcome Comparison of Allograft and Synthetic Bone Substitute in High Tibial Osteotomy

This study is conducted to determine whether a new synthetic bone substitute is better than allogenic bone graft for addressing bone defect in medial open wedge high tibial osteotomy in terms of postoperative pain, postoperative bleeding, operation time and bone healing. The investigators hypothesized the new synthetic bone substitute would bring better outcomes in the outcome variables mentioned above.