At 12-15 months after surgery, patella holder was taken out and no lost of reduction or refracture occurred.
术后12 ~ 15个月取出聚髌器，均未发生骨折复位丢失或再骨折。
Conclusion: the main reason of refracture through the last screw hole in plate fixation is over-stress concentration.
结论钢板边缘末位螺丝钉孔处再骨折的发生，主要与钢板两端应力集中有关。
Conclusion Anatomic reduction, firmly fixation, bone-graft on time, exercise correctly is basic way to prevent refracture of the plate.
结论解剖复位、坚强固定、及时植骨、术后早期合理功能锻炼是预防术后内固定断裂的根本措施。
Objective To evaluate incidence of refracture and recommend strategies of prevention and treatment in aged women with previous fracture.
目的探讨中老年妇女骨折后再骨折发生情况及防治策略。
Objective: to determine the incidence of refracture after callus distraction and explore the risk factors associated with refracture so as to find out the preventive measures.
目的：探讨骨痂延长术后并发再骨折的发生率，以及并发再骨折的相关危险因素，为寻找有效的预防和控制措施提供依据。
Objective: to determine the incidence of refracture after callus distraction and explore the risk factors associated with refracture so as to find out the preventive measures.
目的：探讨骨痂延长术后并发再骨折的发生率，以及并发再骨折的相关危险因素，为寻找有效的预防和控制措施提供依据。
应用推荐