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• W2427452013 abstract "A key determinant of long-term implant survival following primary TKA is post- operative alignment of the limb and components. The aim of this study was to compare the accuracy of the Vector-Vision CT-free navigation system versus conventional hand-guided TKA by comparing post-operative alignment. In a retrospective study 51 sets of post-operative radiographs were analysed, 33 computer-guided and 18 hand-guided. A specific protocol for the measurement of post-operative TKA radiographs was outlined and a novel Trigonometric Method (TM) of angle measurement was compared with the traditional Goniometer Method (GM) of measurement. The standardised protocol was applied to all 51 sets of radiographs. In total, six angles were measured on each radiograph by two independent observers and compared between the computer-guided and hand-guided groups. A protocol for the measurement of post-operative TKA radiographs was delineated with step-by-step instructions. The TM of angle measurement had a precision of 1.06° compared with 1.5° using the GM. The standard deviation of the TM was significantly smaller than the GM (p=0.033) and the intra-class correlation coefficient (ICC) of the TM was 0.94 versus 0.90 for the GM. For the Mechanical Axis (MA), 91% of patients in the computer-guided group attained a MA within 180±3o compared with only 78% in the hand-guided group. T he absolute median raw deviation from 180° was 0.8 in the navigated group and 1.9° in the hand-guided group (p=0.029). Thus, the navigated group was associated with significantly less variability about the neutral 180°. For the other five angle measurements, a higher percentage of patients attained a more neutral alignment with computer-guided TKA; however, these did not reach statistical significance The computer-assisted group demonstrated significantly more neutral alignment following TKA, and this may in turn lead to reduced TKA failure rates and improved implant longevity. In addition, a new TM of angle measurement was found to be more superior in terms of precision in comparison to the traditional method." @default.
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• W2427452013 date "2012-05-01" @default.
• W2427452013 modified "2023-09-24" @default.
• W2427452013 title "ALIGNMENT IN TOTAL KNEE ARTHROPLASTY: A COMPARISON OF COMPUTER-ASSISTED ORTHOPAEDIC SURGERY WITH THE CONVENTIONAL HAND-GUIDED TECHNIQUE" @default.
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