Objective: To explore a new strategy to treat humeral shaft nonunion efficiently. Methods: In the light of mechanical characteristics of Nickel Titanium memory and the anatomic morphology of humeral shaft, we designed...Objective: To explore a new strategy to treat humeral shaft nonunion efficiently. Methods: In the light of mechanical characteristics of Nickel Titanium memory and the anatomic morphology of humeral shaft, we designed the swan like shape memory alloy connector (SMC). SMC was clinically applied in treating 55 cases of humeral shaft nonunion. Success rate of nonunion repair, reinterventions, complications, range of motion, and patient satisfaction were evaluated. Results: Fifty five humeral shaft nonunion patients were treated with autogenous bone grafting and SMC internal fixation. The average follow up period was 32 months. In 50 patients with complete follow up data, 49 were recovered from nonunion by lamellar bone healing. The excellent and good rate was 98%; one patient suffering from re fracture in a fall refused further treatment. Neither infection nor re fracture after SMC extraction or joint dysfunction was found in the whole group. Conclusion: SMC facilitates safe internal fixation and bone grafting; its memory biomechanic properties promote osteosynthesis, resulting in accelerated and high quality healing of humeral shaft nonunion. SMC internal fixation with bone grafting is creative, efficient and promising in treating humeral shaft nonunion.展开更多
目的:探讨动力髋螺钉(dynamic hip screw,DHS)结合形状记忆合金弓齿钉内固定治疗股骨粗隆下Sein-sheimerⅤ型粉碎性骨折的临床疗效。方法:2005年6月至2007年1月收治12例股骨粗隆下粉碎性骨折患者,其中男8例,女4例;年龄31～65岁,平均53...目的:探讨动力髋螺钉(dynamic hip screw,DHS)结合形状记忆合金弓齿钉内固定治疗股骨粗隆下Sein-sheimerⅤ型粉碎性骨折的临床疗效。方法:2005年6月至2007年1月收治12例股骨粗隆下粉碎性骨折患者,其中男8例,女4例;年龄31～65岁,平均53岁。受伤原因:车祸伤7例,高处坠落伤4例,重物砸伤1例。按Seinsheimer分类均为Ⅴ型。均采用动力髋螺钉结合形状记忆合金弓齿钉内固定治疗。结果:12例患者均获得随访,时间20～38个月,平均28个月。全部病例均获得骨性愈合,平均愈合时间3.3个月(3～4.5个月)。未发生深部感染、下肢深静脉血栓、肺栓塞、骨不连等并发症。按Merled'Aubigne髋关节功能评分为(16.75±1.14)分,其中优4例,良8例。结论:动力髋螺钉结合形状记忆合金弓齿钉治疗股骨粗隆下SeinsheimerⅤ型骨折,复位满意,固定牢靠,是治疗股骨粗隆下骨折可选择的理想治疗方法之一。展开更多
Objective:To evaluate the effect of encircled fixer of shape memory alloy on bone fracture. Methods:A total of twenty patients with eighteen males and two females was studied. There were three patients with fractares ...Objective:To evaluate the effect of encircled fixer of shape memory alloy on bone fracture. Methods:A total of twenty patients with eighteen males and two females was studied. There were three patients with fractares in the upper one third of thighbone, five with fractures in the middle part of thighbone, six with humeral fractures, three with collarbone fractures,one with ulna fracture and two with thighbone fractures as complication of artificial hipbone arthroplasty. After exposure and fixation of fracture ends, prepared encircled fixer was inserted into 0～4℃ normal reline(NS) to lower its temperature, then pulled out with a clamp. Encircled fixer was put on the tersile side of the fractured bone(center pointed to fracture line), restored and stabilized after raising temperature in 40℃ NS. Results: Encircled fixers of shape memory alloy were used to treat twenty patients with bone fracture.Clinical concrescence was obtained in 1.5 to 3 months after operation,and the joint gained its normal function without complication. Conclusion:Encircled fixer of shape memory alloy has features as exerting vertical pressure continoulsy, little stress shield effect and convenient manipulation, especially adapt to stem fracture after artificial arthroplasty.展开更多
基金SupportedbyShanghaiYouthScienceandTechnologyRisingStarPlan (No .0 3QD1 4 0 6 9)
文摘Objective: To explore a new strategy to treat humeral shaft nonunion efficiently. Methods: In the light of mechanical characteristics of Nickel Titanium memory and the anatomic morphology of humeral shaft, we designed the swan like shape memory alloy connector (SMC). SMC was clinically applied in treating 55 cases of humeral shaft nonunion. Success rate of nonunion repair, reinterventions, complications, range of motion, and patient satisfaction were evaluated. Results: Fifty five humeral shaft nonunion patients were treated with autogenous bone grafting and SMC internal fixation. The average follow up period was 32 months. In 50 patients with complete follow up data, 49 were recovered from nonunion by lamellar bone healing. The excellent and good rate was 98%; one patient suffering from re fracture in a fall refused further treatment. Neither infection nor re fracture after SMC extraction or joint dysfunction was found in the whole group. Conclusion: SMC facilitates safe internal fixation and bone grafting; its memory biomechanic properties promote osteosynthesis, resulting in accelerated and high quality healing of humeral shaft nonunion. SMC internal fixation with bone grafting is creative, efficient and promising in treating humeral shaft nonunion.
文摘目的:探讨动力髋螺钉(dynamic hip screw,DHS)结合形状记忆合金弓齿钉内固定治疗股骨粗隆下Sein-sheimerⅤ型粉碎性骨折的临床疗效。方法:2005年6月至2007年1月收治12例股骨粗隆下粉碎性骨折患者,其中男8例,女4例;年龄31～65岁,平均53岁。受伤原因:车祸伤7例,高处坠落伤4例,重物砸伤1例。按Seinsheimer分类均为Ⅴ型。均采用动力髋螺钉结合形状记忆合金弓齿钉内固定治疗。结果:12例患者均获得随访,时间20～38个月,平均28个月。全部病例均获得骨性愈合,平均愈合时间3.3个月(3～4.5个月)。未发生深部感染、下肢深静脉血栓、肺栓塞、骨不连等并发症。按Merled'Aubigne髋关节功能评分为(16.75±1.14)分,其中优4例,良8例。结论:动力髋螺钉结合形状记忆合金弓齿钉治疗股骨粗隆下SeinsheimerⅤ型骨折,复位满意,固定牢靠,是治疗股骨粗隆下骨折可选择的理想治疗方法之一。
文摘Objective:To evaluate the effect of encircled fixer of shape memory alloy on bone fracture. Methods:A total of twenty patients with eighteen males and two females was studied. There were three patients with fractares in the upper one third of thighbone, five with fractures in the middle part of thighbone, six with humeral fractures, three with collarbone fractures,one with ulna fracture and two with thighbone fractures as complication of artificial hipbone arthroplasty. After exposure and fixation of fracture ends, prepared encircled fixer was inserted into 0～4℃ normal reline(NS) to lower its temperature, then pulled out with a clamp. Encircled fixer was put on the tersile side of the fractured bone(center pointed to fracture line), restored and stabilized after raising temperature in 40℃ NS. Results: Encircled fixers of shape memory alloy were used to treat twenty patients with bone fracture.Clinical concrescence was obtained in 1.5 to 3 months after operation,and the joint gained its normal function without complication. Conclusion:Encircled fixer of shape memory alloy has features as exerting vertical pressure continoulsy, little stress shield effect and convenient manipulation, especially adapt to stem fracture after artificial arthroplasty.
