Abstract: Objective:To observe the curative effects of injectable calcium sulfate bone graft combined with percutaneous reduction by leverage for treatment of intraarticular calcaneal fracture.Methods: 16 cases of fresh close caleaneal fractures were treated from April 2007 to April 2009.Of them,there were 11 males and 5 females,aged 23-56 years, averaged 34.5 years.According to Sanders classification，there were 8 cases of type II fractures,6 cases of type III fractures and 2 cases of type IV fractures,the course wag from 3 to 16 days,averaged 7.3 days.All the cases were treated by percutaneous reduction by leverage for the collapsing bone graft under the C-arm fluoroscopy,the bone grafts were fixed on the cuboid by round pin through calcaneal tuberosity. The injectable calcium sulfate was implanted into bone defects under subtalar joint assistancing with plaster slab fixation.The postoperative radiologic evaluation criteria is displaced intra-articular<2mm,and satisfactory shape on calcaneus. The function was evaluated according to the the ankle- hindfoot score of American Orthopedic Foot and Ankle Society Score(AOFAS).Results:The injectable calcium sulfate implanted into bone defects were absorbed in all patient,no one case happened rejection and pinhole infection,the calcaneal fracture in all patient was healed. X-ray films of patients showed well reduction on the caleaneal posterior subtalar articular facet and satisfactory shape on calcaneus.According to the score of AOFAS, the effect was excellent in 9 cases, good in 6 cases,and fair in 1 case,with 93.8% rate of good and excellent. Conclusion:The technique of injectable calcium sulfate bone graft combined with percutaneous reduction by leverage for treatment of intraarticular calcaneal fracture is liable to operate and can provide exactly efficiency,and in favor of the healing of caleaneal fracture．, Objective:To observe the curative effects of injectable calcium sulfate bone graft combined with percutaneous reduction by leverage for treatment of intraarticular calcaneal fracture.Methods: 16 cases of fresh close caleaneal fractures were treated from April 2007 to April 2009.Of them,there were 11 males and 5 females,aged 23-56 years, averaged 34.5 years.According to Sanders classification，there were 8 cases of type II fractures,6 cases of type III fractures and 2 cases of type IV fractures,the course wag from 3 to 16 days,averaged 7.3 days.All the cases were treated by percutaneous reduction by leverage for the collapsing bone graft under the C-arm fluoroscopy,the bone grafts were fixed on the cuboid by round pin through calcaneal tuberosity. The injectable calcium sulfate was implanted into bone defects under subtalar joint assistancing with plaster slab fixation.The postoperative radiologic evaluation criteria is displaced intra-articular<2mm,and satisfactory shape on calcaneus. The function was evaluated according to the the ankle- hindfoot score of American Orthopedic Foot and Ankle Society Score(AOFAS).Results:The injectable calcium sulfate implanted into bone defects were absorbed in all patient,no one case happened rejection and pinhole infection,the calcaneal fracture in all patient was healed. X-ray films of patients showed well reduction on the caleaneal posterior subtalar articular facet and satisfactory shape on calcaneus.According to the score of AOFAS, the effect was excellent in 9 cases, good in 6 cases,and fair in 1 case,with 93.8% rate of good and excellent. Conclusion:The technique of injectable calcium sulfate bone graft combined with percutaneous reduction by leverage for treatment of intraarticular calcaneal fracture is liable to operate and can provide exactly efficiency,and in favor of the healing of caleaneal fracture．

Key words: calcaneal fracture, minimally invasive surgery, calcium sulfate, bone grafting, calcaneal fracture, minimally invasive surgery, calcium sulfate, 植骨