Objective: To summarize the effectiveness of nitinol memory alloy two foot fixator with autologous cancellous bone grafting in treating old scaphoid fracture and nonunion.
Methods: Between January 2013 and January 2017, 11 patients of old scaphoid fracture and nonunion were treated with nitinol memory alloy two foot fixator and autologous cancellous bone grafting. All patients were male with an average age of 26.1 years (range, 18-42 years). The fractures were caused by sport in 3 cases, falling in 7 cases, and a crashing object in 1 case. The interval between injury and operation was 6-18 months (mean, 8.9 months). Postoperative outcome measures included operation time, fracture healing time, grip strength, range of motion (ROM) of flexion, extension, ulnar deviation, and radial deviation, Mayo score, visual analogue scale (VAS) score, and the Disabilities of the Arm, Shoulder, and Hand (DASH) score.
Results: The operation time was 35-63 minutes (mean, 48 minutes). All incisions had primary healing with no infection and loosening or breakage of internal fixator. All patients were followed up 12-30 months (mean, 20.7 months). X-ray films showed that fracture healing was achieved in all patients with an average time of 15 weeks (range, 12-25 weeks). All internal fixators were removed after 10-12 months of operation (mean, 11.2 months). At last follow-up, the grip strength, ROMs of flexion, ulnar deviation, and radial deviation were superior to those before operation ( P<0.05), no significant difference was found in ROM of extension between pre- and post-operation ( t=0.229, P=0.824). There were significant differences in above indexes between affected and normal sides ( P<0.05). At last follow-up, the Mayo, VAS, DASH scores were also significantly superior to those before operation ( P<0.05).
Conclusion: For the old scaphoid fracture and nonunion, Ni-Ti arched shape-memory alloy fixator and autologous cancellous bone grafting can obtain good effectiveness, which is an effective treatment.
目的: 总结镍钛记忆合金两脚固定器联合自体松质骨移植治疗舟骨陈旧性骨折并骨不连疗效。.
方法: 2013 年 1 月—2017 年 1 月，应用镍钛记忆合金两脚固定器联合自体松质骨移植治疗 11 例舟骨陈旧性骨折并骨不连患者。患者均为男性；年龄 18～42 岁，平均 26.1 岁。致伤原因：运动伤 3 例，摔伤 7 例，重物砸伤 1 例。受伤至手术时间 6～18 个月，平均 8.9 个月。通过手术时间、骨折愈合时间、握力、腕关节活动度（屈曲、背伸、尺偏、桡偏），以及 Mayo 评分、疼痛视觉模拟评分（VAS）以及上臂、肩、手功能障碍评分（DASH）评价临床疗效。.
结果: 手术时间 35～63 min，平均 48 min。术后切口均 Ⅰ 期愈合，无感染、内固定物松动及断裂等并发症发生。患者均获随访，随访时间 12～30 个月，平均 20.7 个月。X 线片检查骨折均愈合，愈合时间为 12～25 周，平均 15 周。所有患者内固定物于术后 10～12 个月取出，平均 11.2 个月。末次随访时，患侧握力以及腕关节屈曲、桡偏、尺偏活动度均较术前明显改善，差异有统计学意义（ P<0.05）；背伸活动度与术前比较差异无统计学意义（ t=0.229， P=0.824）；上述指标与健侧相比，差异均有统计学意义（ P<0.05）。末次随访时，Mayo 评分、VAS 评分、DASH 评分均较术前明显改善，差异有统计学意义（ P<0.05）。.
结论: 镍钛记忆合金两脚固定器联合松质骨移植治疗舟骨陈旧性骨折并骨不连可获得较好疗效，可作为一种治疗选择。.
Keywords: Scaphoid fracture; bone graft; bone nonunion; nitinol memory alloy two foot fixator; wrist.