Emerson Roger H
Texas Center for Joint Replacement, Plano, Tex, USA.
Orthopedics. 2007 May;30(5 Suppl):32-4.
From a series of 64 sequential Oxford (Biomet Orthopedics, Inc, Warsaw, phase 3 implants, two study groups were selected: 23 knees with unilateral surgery and a normal opposite side, and 21 knees with bilateral simultaneous surgery. Standing 3-foot radiographs were taken pre- and postoperatively to assess the femorotibial angle and the location of the mechanical axis of the limb in relation to the knee. Results in the unilateral group showed an average postoperative femorotibial angle of 4.50 was compared to a 3.40 angle for the normal side, (not significantly different; P=.09). Results for the bilateral group were an average postoperative femorotibial angle of 3.40 for the right and 3.50 for the left, (not significantly different; P=.7). The location of the mechanical axis was similar between the knees in both groups. The study concludes that the Oxford soft-tissue balancing technique restores alignment, which is on average similar to the opposite side, and therefore presumably normal for that knee. Restoration of normal alignment should not put excess stress onto the lateral compartment.
从一系列64例连续的牛津（生物计量骨科公司，华沙，3期植入物）病例中，选取了两个研究组：23例单侧手术且对侧正常的膝关节，以及21例双侧同时手术的膝关节。术前和术后均拍摄站立位3英尺X线片，以评估股骨胫骨角以及肢体机械轴相对于膝关节的位置。单侧组结果显示，术后股骨胫骨角平均为4.50°，而正常侧为3.40°，（差异不显著；P = 0.09）。双侧组结果为，右侧术后股骨胫骨角平均为3.40°，左侧为3.50°，（差异不显著；P = 0.7）。两组膝关节之间机械轴的位置相似。该研究得出结论，牛津软组织平衡技术可恢复对线，平均而言与对侧相似，因此推测该膝关节正常。恢复正常对线不应给外侧间室施加过大压力。
