UNASSIGNED: Twenty bicruciate retaining TKAs were performed using standard instrumentation. Fluoroscopic kinematic data were obtained during gait and a single knee bend. Differences (Δ) between radiographic measurements of preoperative and PPTS were correlated with in-vivo knee kinematics. Patients were separated into 2 groups based on their Δ values. Group I consisted of Δ values less than 0.7, indicating either a similar PPTS compared to preoperative PTS or a slightly flatter PPTS. Group II consisted of Δ values above 0.7, indicating a steepened PPTS.
UNASSIGNED: Preoperative PTS values ranged from -0.5° to 11.2°, with an average of 5.0° ± 3.4°. PPTS values ranged from 3.0° to 12.1°, with an average of 7.1° ± 3.1°. Weight-bearing range of motion (WBROM) measured from 94° to 139°, and femorotibial axial rotation ranged from -2.9° to 17.3°. A t-test revealed average values for WBROM in Group IT (Δ < 0.7) to be significantly greater than those for Group IIT (Δ > 0.7) (P = .01).
UNASSIGNED: These findings indicate that either a PPTS approximating the preoperative PTS or a slightly flattened PPTS in comparison (Δ < 0.7) is associated with WBROM greater than 130°. Values for axial rotation and anterior sliding were not significantly associated with changes to the PTS.
■使用标准仪器进行20个双杂物保留TKAs。在步态和单个膝盖弯曲期间获得荧光透视运动学数据。术前和PPTS的影像学测量之间的差异(Δ)与体内膝关节运动学相关。根据其Δ值将患者分为2组。第一组由小于0.7的Δ值组成,表明与术前PTS相比相似的PPTS或稍微平坦的PPTS。第II组由高于0.7的Δ值组成,表明PPTS变陡。
■术前PTS值范围为-0.5°至11.2°,平均值为5.0°±3.4°。PPTS值范围为3.0°至12.1°,平均为7.1°±3.1°。从94°到139°测量的负重运动范围(WBROM),股骨胫骨轴向旋转范围为-2.9°至17.3°。t检验显示,IT组(Δ<0.7)中WBROM的平均值明显大于IIT组(Δ>0.7)(P=0.01)。
■这些发现表明,与术前PTS近似的PPTS或相比之下略微平坦的PPTS(Δ<0.7)与大于130°的WBROM相关。轴向旋转和前滑动的值与PTS的变化没有显着相关。