摘要
目的比较电磁导航辅助与常规全膝关节置换（total knee arthroplasty，TKA）术后的下肢力线与假体位置。方法电磁导航辅助初次TKA连续病例64例100膝（导航组），非同期常规初次TKA连续病例62例100膝（常规组）。比较术后3个月双下肢全长X线片及膝关节正侧位X线片上的机械轴线角，股骨、胫骨假体冠状面倾斜角（α角和β角），股骨假体矢状面倾斜角（γ角）。结果导航组机械轴线角为1．20°±1．92°，常规组2．31°±2.25°，差异有统计学意义；导航组α角为89.33°±1．64°，常规组88．68°±2．57°，差异有统计学意义。导航组β角为89．64°±1．47°，常规组89．26°±2．05°，差异无统计学意义；导航组γ角为90．86°±2-37°，常规组90．59°±3．44°，差异无统计学意义。术后机械轴线角误差在±3°内者导航组占86％，常规组79％，差异无统计学意义；α角误差≤90°±3°者导航组占92％，常规组77％，差异有统计学意义；两组β角和γ角误差≤90°±3°者所占比例的差异均无统计学意义。结论电磁导航辅助较常规TKA可获得更加精确的假体位置和下肢力线，其优势主要体现在股骨侧力线矫正而非胫骨侧。
Objective To compare the lower limb alignment and prosthesis position after total knee arthroplasty （TKA） with or without using electromagnetic navigation. Methods Sixty-four patients （100 knees） underwent TKA under electromagnetic navigation, while 62 patients （100 knees） underwent conventional TKA. Three months after operation, the mechanical axial line angle and prosthesis position （angels α, β, γ） were measured via the full-length radiograph of both lower limbs and anteriorposterior and lateral Xrays of the knee. Results The average mechanical axial line angle and angle α were 1.20°±1.92°and 89.33°±1.64° in navigation group, respectively, and 2.31°±2.25° and 88.68°±2.57° in conventional group. And the differences were significant with regard to the above two indexes between two groups. The average angle β and angle γ were 89.64°±1.47° and 90.86°±2.37° in navigation group, respectively, and 89.26°± 2.05° and 90.59°±3.44° in conventional group. However, the differences were not significant with regard to the above two indexes between two groups. After operation, mechanical axial line angle error was within ±3° in 86% of patients in navigation group, while in 79% of patients in conventional group; there was no significant difference between them. The angle α error was within 90°±3° in 92% of patients in navigation group, while in 77% of patients in conventional group; there was significant difference between them. However, there were no significant differences in percentage of patients whose errors of angle 13 and angle γ were within 90°±3° between two groups. Conclusion With using electromagnetic navigation in TKA, more precise prosthesis position and the mechanical axis can be achieved compared with the conventional technique. And its advantages mainly contribute to the coronal plane of the femoral side rather than the tibial side.
出处
《中华骨科杂志》
CAS
CSCD
北大核心
2012年第12期1091-1097,共7页
Chinese Journal of Orthopaedics
关键词
关节成形术
置换
膝
外科手术
计算机辅助
电磁学
Arthroplasty, replacement, knee
Surgery, computer-assisted
Electromagnetics
