摘要目的:探讨新型角度可调式截骨导向器在股骨远端内侧闭合截骨术中实现快速精准截骨的可行性。方法:回顾性分析2018年1月至2019年7月西安交通大学医学院附属西安市红会医院中西医结合骨科收治的14例（17膝）行股骨远端内侧闭合截骨治疗的膝关节外翻畸形患者的临床资料。其中男性3例，女性11例，年龄（41.4±16.4）岁（范围：18~56岁）。体重指数（23.5±3.5）kg/m 2（范围：18.1~28.9 kg/m 2）。术前利用Solidworks软件行精确术前测量，计算旋转角度和旋转半径；术中均在自主设计的角度可调式截骨导向器辅助下行导针置入，根据测量参数调节导向器，将导向器与骨面贴紧，顺导针孔钻入导针，透视确认导针的位置良好，即完成导针的置入；在导针引导下进行截骨后使用Tomofix接骨板固定。记录导针放至满意位置所需置入次数、时间和透视次数，矫形后皮质与皮质、截骨面与截骨面的对合情况，截骨块计划厚度与实际最大厚度，截骨块上下面的面积，股骨远端后方角，力线的矫正情况等；应用美国膝关节学会评分（AKSS）、Tegner评分等评价术后膝关节功能恢复情况，并观察并发症及骨折愈合情况。手术前后测量指标和评分的比较采用配对样本 t检验或Kruskal-Wallis秩和检验。 结果:所有病例导针均置入满意位置，前2枚导针一次置入即成功的10膝，经1次调整达满意的5膝，2次调整的2膝。导针置入所需时间平均为82.4 s（范围：51~125 s），平均透视1.5次（范围：1~5次）。截骨块上、下面的面积分别为（5.52±0.52）cm 2、（5.36±0.49）cm 2；术前计划测得截骨块厚度（11.3±1.9）mm，实际截取的厚度为（8.1±1.7）mm。股骨远端后方角术前为（85.2±2.6）°，术后为（85.5±1.4）°，差异无统计学意义（ t=-0.401， P>0.05）。所有患者术后6个月均获得随访，AKSS、Tegner评分均较术前明显提高（ P值均<0.05），力线矫正均在目标范围内。其中3膝发生合页点断裂，截骨处均达骨性愈合，未发生内固定断裂、延迟愈合或不愈合等并发症。 结论:新型角度可调式截骨导向器可以快速准确的按术前计划置入导针，术中无需透视力线、可以保证皮质与皮质、截骨面与截骨面的良好对合，不会造成矢状面畸形，值得在临床中应用和推广。

abstractsObjective:To explore the feasibility of fast and accurate osteotomy using a new angle adjustable osteotomy guide (AAOG) in closing wedge distal femoral osteotomy(CWDFO).Methods:The clinical data of 14 patients (17 knees) with valgus knee treated with CWDFO at Department of Integrated Chinese and Western Medicine Orthopedics, Honghui Hospital, Xi′an Jiaotong University from January 2018 to July 2019 were analyzed retrospectively. There were 3 males and 11 females, aging (41.4±16.4) years (range: 18 to 56 years). The body mass index was (23.5±3.5) kg/m 2 (range: 18.1 to 28.9 kg/m 2). The guide pins were placed with the assistance of the self-designed AAOG. Before the surgery, Solidworks software was used to calculate the correction angle and the osteotomy radius accurately. The osteotomy guide was adjusted according to these two parameters. During the surgery, the adjusted osteotomy guide was placed to the surface of bone closely and the guide pins were drilled into the bone through the guide holes. The position of the guide pins was confirmed under fluoroscopy. The osteotomy was finished under guide of pins and fixed with Tomofix plate (Synthes). The times and duration of placement of the guide pins, the times of X-ray examination, the planned and actual thickness of the osteotomy wedge, the top and bottom area of the osteotomy wedge, the posterior distal femoral angle(PDFA), the correction of the weight line, and the American Knee Society Score(AKSS) and Tegner scores were collected and compared by paired t test or Kruskal-Wallis non-parametric test. Healing time after osteotomy and complications were recorded. Results:The guide pins were successfully placed once in 10 knees, adjusted once in 5 knees and twice in 2 knees. The time spent in placing all the 6 pins was 82.4 seconds (range: 51 to 125 seconds), and the times of X-ray examination was 1.5 times (range: 1 to 5 times). The top and bottom areas of the osteotomy wedge were (5.52±0.52)cm 2 and (5.36±0.49)cm 2. PDFA was (85.2±2.6)° preoperatively and (85.5±1.4)° postoperatively ( t=-0.401, P>0.05). The thickness of the osteotomy was (11.3±1.9)mm according to the preoperative plan, and the actual thickness was (8.1±1.7)mm. All the patients were followed up for 6 months after surgery and AKSS and Tegner scores improved significantly (all P<0.05). The correction of the weight lines was within the ideal range. Fractures of the hinge point occurred in 3 knees. All of the osseous healing without complications. Conclusion:The new osteotomy guide helps to place the guide pins rapidly and precisely according to the preoperative planning, which should be widely used in clinical applications with promising outcomes.