We have compared the time to recovery of isokinetic quadriceps strength after total knee replacement (TKR) using three different lengths of incision in the quadriceps. We prospectively randomised 60 patients into one of the three groups according to the length of incision in the quadriceps above the upper border of the patella (2 cm, 4 cm or 6 cm). The strength of the knees was measured pre-operatively and every month post-operatively until the peak quadriceps torque returned to its pre-operative level.There was no significant difference in the mean operating time, blood loss, hospital stay, alignment or pre-operative isokinetic quadriceps strength between the three groups. Using the Kaplan–Meier method, group A had a similar mean recovery time to group B (2.0 ± 0.2 vs 2.5 ± 0.2 months, p = 0.176). Group C required a significantly longer recovery time (3.4 ± 0.3 months) than the other groups (p < 0.03). However, there were no significant differences in the mean Oxford knee scores one year post-operatively between the groups.We conclude that an incision of up to 4 cm in the quadriceps does not delay the recovery of its isokinetic strength after TKR.
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机译：我们比较了在四头肌中使用三种不同长度的切口进行全膝关节置换（TKR）后等速四头肌力量恢复的时间。我们根据60骨上缘（2 cm，4 cm或6 cm）上方股四头肌的切口长度将60例患者随机分为三组。术前和术后每个月测量膝盖的力量，直到股四头肌扭矩峰值恢复到术前水平。平均手术时间，失血量，住院时间，对准或术前均无明显差异。三组之间的等速四头肌手术强度。使用Kaplan–Meier方法，A组的平均恢复时间与B组相似（2.0±0.2 vs vs 2.5±0.2个月，p = 0.176）。 C组比其他组需要更长的恢复时间（3.4±0.3个月）（p <0.03）。然而，两组之间术后一年牛津平均膝关节评分无显着差异。我们得出结论，在四头肌上切开4 cm的切口不会延迟TKR后恢复其等速肌力。
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