改良锚钉置入角度和应用双滑轮技术治疗髌骨下极撕脱骨折

目的:评价改良锚钉置入角度和应用双滑轮技术治疗髌骨下极撕脱性骨折的临床疗效。方法：回顾性分析2015年12月至2018年12月收治的髌骨下极撕脱性骨折患者22例，男10例，女12例；年龄19~70（44.00±15.24）岁。均采用改良锚钉置入角度和应用双滑轮技术治疗。术后定期随访，采用膝关节活动度（range of motion，ROM）和Bostman评分系统评价膝关节功能康复情况。结果：22例全部获得随访，时间18~46（30.86±8.00）周。末次随访时，患侧膝关节ROM为（130.82±4.69）°，健侧膝关节ROM为（133.23±3.15）°，差异无统计学意义（P>0.05）。末次随访Bostman评分（28.45±1.41）分，优18例，良4例。结论：改良锚钉置入角度和应用双滑轮技术治疗髌骨下极撕脱性骨折操作简便，疗效满意，膝关节功能恢复良好。

Treatment of avulsion fracture of inferior pole of patella with improved angle of anchor and double pulley technique

Objective: To evaluate the angle of modified anchor nail placement and the curative effect of double pulley technology for the treatment of extreme avulsion fracture of lower patella.Methods: From December 2015 to December 2018, a total of 22 patients(10 males and 12 females) with avulsion fracture of the inferior pole of patella were retrospectively analyzed. The average age was (44.00±15.24) years old(range, 19 to 70 years). All patients were treated with modified anchor angle and double pulley technique. The range of motion(ROM) and Bostman score system were used to evaluate the functional recovery of knee joint.Results: All 22 cases were followed up with an average of (30.86±8.00) weeks (18 to 46 weeks). At the last follow-up, ROM of the affected knee was (130.82±4.69) °, and the contralateral knee was (133.23 ±3.15) °, there was no significant difference between two groups (P>0.05). The average Bostman score was (28.45±1.41) scores, 18 cases were excellent results, 4 cases were good.Conclusion: Improved anchor placement angle and double pulley technique for treatment of extreme avulsion fracture of lower patella is easy to operate, with satisfactory curative effect and good recovery of knee joint function.