title: Are There Any Clinical and Radiographic Differences Between Quadriceps-sparing and Mini-medial Parapatellar Approaches in Total Knee Arthroplasty After a Minimum 5 Years of Follow-up?
abstract: BACKGROUND
  Although the early clinical outcomes of total knee arthroplasty (TKA) using minimally invasive surgery techniques have been widely described, data on the mid- to long-term outcomes are limited. We designed a retrospective study to compare the two most common TKA techniques - The modified quadriceps-sparing (m-QS) approach and the mini-medial parapatellar (MMP) approach - In terms of the clinical and radiographic parameters, over a minimum follow-up period of 5 years.
  
  
  METHODS
  The m-QS approach was used in 31 knees and the MMP approach, in 36 knees. Knees in both groups were compared for component position and alignment, knee alignment, length of the skin incision, range of motion, Visual Analog Scale score, muscle torques, Knee Society Score, Western Ontario and McMaster Universities Osteoarthritis Index, and number of complications.
  
  
  RESULTS
  There were no major intergroup differences in any of the clinical and radiographic outcomes assessed at the final follow-up examination.
  
  
  CONCLUSIONS
  On the basis of numbers studied, the m-QS group, which requires more technique, showed equivalent results with the MMP group in the postoperative 5 years. Preservation of the extensor mechanism in the m-QS approach could not ensure any improvement in the clinical outcomes during the mid-term follow-up duration.
authors.forename: Ai-Bing
authors.initials: AB
authors.lastname: Huang
authors.forename: Hai-Jun
authors.initials: HJ
authors.lastname: Wang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Jia-Kuo
authors.initials: JK
authors.lastname: Yu
authors.forename: Bo
authors.initials: B
authors.lastname: Yang
authors.forename: Dong
authors.initials: D
authors.lastname: Ma
authors.forename: Ji-Ying
authors.initials: JY
authors.lastname: Zhang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures / Q000009:adverse effects / Q000379:methods*; D052097:Quadriceps Muscle / Q000000981:diagnostic imaging; D011859:Radiography; D012189:Retrospective Studies