title: Current concepts of articular cartilage restoration techniques in the knee.
abstract: BACKGROUND
  Articular cartilage injuries are common in patients presenting to surgeons with primary complaints of knee pain or mechanical symptoms. Treatment options include comprehensive nonoperative management, palliative surgery, joint preservation operations, and arthroplasty.
  
  
  METHODS
  A MEDLINE search on articular cartilage restoration techniques of the knee was conducted to identify outcome studies published from 1993 to 2013. Special emphasis was given to Level 1 and 2 published studies.
  
  
  METHODS
  Clinical review.
  
  
  METHODS
  Level 3.
  
  
  RESULTS
  CURRENT SURGICAL OPTIONS WITH DOCUMENTED OUTCOMES IN TREATING CHONDRAL INJURIES IN THE KNEE INCLUDE THE FOLLOWING: microfracture, osteochondral autograft transfer, osteochondral allograft transplant, and autologous chondrocyte transplantation. Generally, results are favorable regarding patient satisfaction and return to sport when proper treatment algorithms and surgical techniques are followed, with 52% to 96% of patients demonstrating good to excellent clinical outcomes and 66% to 91% returning to sport at preinjury levels.
  
  
  CONCLUSIONS
  Clinical, functional, and radiographic outcomes may be improved in the majority of patients with articular cartilage restoration surgery; however, some patients may not fully return to their preinjury activity levels postoperatively. In active and athletic patient populations, biological techniques that restore the articular surface may be options that provide symptom relief and return patients to their prior levels of function.
authors.affiliation: Department of Orthopedic Surgery and the Sports Medicine Center, Mayo Clinic and Mayo Foundation, Rochester, Minnesota.
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Camp
authors.affiliation: Department of Orthopedic Surgery and the Sports Medicine Center, Mayo Clinic and Mayo Foundation, Rochester, Minnesota.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Stuart
authors.affiliation: Department of Orthopedic Surgery and the Sports Medicine Center, Mayo Clinic and Mayo Foundation, Rochester, Minnesota.
authors.forename: Aaron J
authors.initials: AJ
authors.lastname: Krych
keywords: autologous chondrocyte implantation; cartilage injuries; knee; microfracture; osteochondral allograft transplant; osteochondral autograft transfer