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document
Computer-navigated versus conventional total knee arthroplasty a prospective randomized trial . BACKGROUND The literature lacks studies that confirm whether the improved radiographic alignment that can be achieved with computer-navigated total knee arthroplasty improves patients ’ activities of daily living or the durability of total knee prostheses . The purpose of this study was to determine whether computer-navigated total knee arthroplasty improves the clinical function , alignment , and survivorship of the components . METHODS We prospectively compared the results of 520 patients with osteoarthritis who underwent computer-navigated total knee arthroplasty for one knee and conventional total knee arthroplasty for the other . The assignment of the knee to navigation or not was done randomly . There were 452 women ( 904 knees ) and sixty-eight men ( 136 knees ) with a mean age of sixty-eight years ( range , forty-nine to eighty-eight years ) at the time of the index arthroplasty . The mean follow-up period was 10.8 years ( range , ten to twelve years ) . The patients were assessed clinically and radiographically with the rating system of the Knee Society and with the Western Ontario and McMaster Universities Osteoarthritis Index ( WOMAC ) score at three months , one year , and annually thereafter . RESULTS Total knee scores , knee function scores , pain scores , WOMAC scores , knee motion , and activity scores did not show statistically significant differences between the two groups preoperatively or at the time of the final follow-up . Alignment and the survivorship of the components were not significantly different between the two groups . The Kaplan-Meier survivorship with revision as the end point at 10.8 years was 98.8 % ( 95 % confidence interval [ CI ] , 0.96 to 1.00 ) in the computernavigated total knee arthroplasty group and 99.2 % ( 95 % CI , 0.96 to 1.00 ) in the conventional total knee arthroplasty group . CONCLUSIONS Our data demonstrated no difference in clinical function or alignment and survivorship of the components between the knees that underwent computer-navigated total knee arthroplasty and those that underwent conventional total knee arthroplasty .
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Intervention_Surgical
Computer-navigated
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Intervention_Surgical
conventional total knee arthroplasty
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Intervention_Surgical
computer-navigated total knee arthroplasty
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Outcome_Physical
rating system of the Knee Society
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Outcome_Physical
Western Ontario and McMaster Universities Osteoarthritis Index ( WOMAC ) score
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Outcome_Physical
Total knee scores
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Outcome_Physical
knee function scores
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Outcome_Pain
pain scores
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Outcome_Physical
WOMAC scores
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Outcome_Physical
knee motion
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Outcome_Physical
activity scores
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Outcome_Other
The Kaplan-Meier survivorship
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Participant_Sample-size
520
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Participant_Condition
osteoarthritis
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Participant_Condition
underwent computer-navigated total knee arthroplasty for one knee
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Participant_Condition
conventional total knee arthroplasty for the other
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Participant_Sample-size
452
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Participant_Sex
women ( 904 knees
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Participant_Sample-size
sixty-eight
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Participant_Sex
men ( 136 knees
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Participant_Age
mean age of sixty-eight years