title: Results of Surgical Treatment of Chronic Patellar Tendinosis (Jumper's Knee): A Systematic Review of the Literature.
abstract: OBJECTIVE
  To review the literature concerning surgical treatment options for chronic patellar tendinosis (jumper's knee), a common problem among athletes. When conservative treatment fails, surgical treatment is required.
  
  
  METHODS
  Systematic review of the literature concerning the results of current surgical treatment options for chronic patellar tendinosis. All articles of studies with an evidence level ≥IV from January 2000 until February 2015 presenting the surgical outcome after arthroscopic as well as open treatment of chronic patellar tendinosis were included. The literature research of the PubMed database was performed using the following key words: "patellar" and "tendinitis," "tendonitis," "tendinosis" or "tendinopathy"; "inferior patellar pole"; "jumper's knee"; "surgical treatment" and "open" or "arthroscopic patellar tenotomy."
  
  
  RESULTS
  A systematic review of the literature was performed especially to point out the effectiveness of arthroscopic treatment of chronic patellar tendinosis. The results revealed good clinical results for arthroscopic as well as open treatment of chronic patellar tendinosis that is refractory to conservative treatment in athletes. An average success rate of 87% was found for the open treatment group and of 91% for the arthroscopic treatment group. However, after open surgery, the mean time of return to the preinjury level of activity is 8 to 12 months, with a certain number of patients/athletes who cannot return to the preinjury level of activity.
  
  
  CONCLUSIONS
  Minimally invasive, arthroscopically assisted or all-arthroscopic procedures may lead to a significantly faster return to sporting activities and may, therefore, be the preferred method of surgical treatment.
  
  
  METHODS
  Level IV, systematic review of Level I-IV studies.
authors.affiliation: Department of Orthopedic Surgery, Saarland University, Homburg/Saar, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Brockmeyer
authors.affiliation: Department of Orthopedic Surgery, Saarland University, Homburg/Saar, Germany.
authors.forename: Nora
authors.initials: N
authors.lastname: Diehl
authors.affiliation: Department of Orthopedic Surgery, Saarland University, Homburg/Saar, Germany.
authors.forename: Cornelia
authors.initials: C
authors.lastname: Schmitt
authors.affiliation: Department of Orthopedic Surgery, Saarland University, Homburg/Saar, Germany.
authors.forename: Dieter M
authors.initials: DM
authors.lastname: Kohn
authors.affiliation: Department of Orthopedic Surgery, Saarland University, Homburg/Saar, Germany. Electronic address: olaf.lorbach@gmx.de.
authors.forename: Olaf
authors.initials: O
authors.lastname: Lorbach
mesh_terms: D001182:Arthroscopy / Q000379:methods; D001265:Athletic Injuries / Q000601:surgery*; D002908:Chronic Disease; D006801:Humans; D017847:Patellar Ligament / Q000601:surgery*; D052256:Tendinopathy / Q000601:surgery* / Q000628:therapy