[Quadriceps-sparing minimally invasive technique for total knee arthroplasty : a new classification].

Minimally invasive total knee arthroplasty (TKA) has evolved over the last 5 years to a viable alternative to the traditional open technique. In this paper a new classification system is proposed to help organize the various approaches. The surgical technique for quadriceps-sparing minimally invasive TKA, the anaesthesia and the rehabilitation programme are described. Medium-term results of a pilot study of 58 knees in 54 patients are presented, which suggest excellent early outcomes. Technical factors, quality control, and training remain the main issues of concern for surgeons new to these demanding techniques.