Comparison of Computer-Assisted Navigation and Conventional Instrumentation for Bilateral Total Knee Arthroplasty

Chang Gung Memorial Hospital56 enrolled

Overview

To compare the functional outcomes of Computer-Assisted Navigation (CAS) and Conventional Instrumentation TKA at the 8-year follow-up.

The data of the present study was collected from the review of the medical chart of the patients who were scheduled to undergo staged bilateral TKA and randomly assigned to receive Computer-Assisted Navigation (CAS) TKA in one limb and conventional TKA. Then, comparing the functional outcomes of CAS and Conventional Instrumentation was performed by statistical software.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Arthropathy of Knee Joint

Interventions

Computer-Assisted Navigation TKAPROCEDURE

TKAs were performed using the image-free CAS navigation system VectorVision

Eligibility

Sex: ALL

Medical Language ↔ Plain English

Inclusion Criteria: * The patients who were scheduled to undergo staged bilateral TKA and randomly assigned to receive CAS TKA in one limb and conventional TKA in the other at the 8-year follow-up. Exclusion Criteria: \-

Locations (1)

Sports Medicine Center, Chang Gung Memorial Hospital

Pizi, Taiwan

Outcomes

Primary Outcomes

International Knee Society (IKS)

To assess the functional outcome of TKA by self-explanatory questionnaire

Time frame: up to 8-year follow-up

Secondary Outcomes

Radiographic evaluation

Standard anteroposterior, lateral radiographs of the knee and standing long-leg radiographs of the lower extremity were obtained pre- and postoperatively. The lower extremities were fully extended so that the tibial tuberosities were facing forward and the lateral malleoli were 15 cm apart to ensure that the tibia was vertical and facing forward with minimal rotation. The X-ray beam (20-25 mA/s; 80-85 kV) was centered at the knee joint level at a distance of 120-140 cm.Radiographic data included the mechanical axis angle and the four component alignments described by Ewald: the femoral valgus (FV) angle; tibial valgus angle (TV); femoral flexion (FF) angle; and tibial flexion angle (TF)

Time frame: Baseline and 3 months after operation

Hospital for Special Surgery (HSS) Questionnaire

To assess the functional outcome of TKA by self-explanatory questionnaire

Time frame: Baseline, 8-year follow-up

Western Ontario and McMaster University Osteoarthritis Index (WOMAC)

To assess the functional outcome of TKA by self-explanatory questionnaire

Time frame: Baseline, 8-year follow-up

Short Form-36 (SF-36) Health Survey

To assess the functional outcome of TKA by self-explanatory questionnaire

Time frame: Baseline, 8-year follow-up

Data from ClinicalTrials.gov

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