Abstract
Purpose: To investigate the effectiveness of minimally invasive total knee arthroplasty using the mini-midvastus approach through analyzing the short-term clinical outcomes. Materials and Methods: Seventy-seven consecutive total knee arthroplasties were performed with the mini-midvastus surgical technique from August 2005 to February 2006 and were followed for more than 1 year after the procedure. All operations were performed with the Nexgen LPS-flex total knee system using a MIS quad-sparing instrument. The evaluation included preoperative and postoperative clinical data, surgical and radiological outcomes. Results: The length of skin incision was average 8.4±0.6 cm and the operation time was average 95.5±15.7 minutes. The blood loss was average 727.5±315.5 cc. The tibial component alignment angles averaged 0.2±1.3 o varus and the tibiofemoral angles averaged 5.8±1.8 o . The mean ROM and the mean HSS score was 117±10 o and 120±11 o , 88.9±7.1 and 96.2±4.5 at eight weeks and one year after surgery respectively. Conclusion: If proper surgical procedures are performed using the appropriate surgical instruments, minimally invasive total knee arthroplasty with the assistance of the mini-midvastus approach, can result in good clinical outcomes and alignment of the implants.
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