title: [Analysis of effects of arthroscopic treatment for recurrent patellar dislocation by lateral patellar retinacular release outside the synovial bursa of knee joint combined with reconstruction of medial patellofemoral ligament].
abstract: OBJECTIVE
  To introduce an arthroscopic technique in managing recurrent dislocation of the patella and its clinical results.
  
  
  METHODS
  Sixteen patients with recurrent patellar dislocation were reviewed, including 3 males and 13 females. The average age was 17.6 years old (ranged from 14 to 32 years). The patients suffering from patellar sub-luxation averaged 18.5 months (ranged from 6 to 23 months)before operation. These patients were treated with lateral patellar retinacular release outside the synovial bursa of knee joint and medial patellofemoral ligament reconstruction using the semitendinosus tendon free autograft. The Lyshohm scores before and after operation were used to evaluate outcomes at the final follow-up.
  
  
  RESULTS
  All the patients were followed up, and the duration ranged from 6 to 48 months, with an average of 12 months. There was no recurrence. The Q angle decreased from (16.4 ± 3.7)° to (10.1 ± 1.4)°; insall index decreased from 1.37 ± 0.25 to 1.28 ± 0.23; congruence angle decreased from (21.3 ± 2.6)° to (5.86 ± 2.23)°; Lysholm score improved from 76.1 ± 5.2 to 89.8 ± 4.1 at 6 months after operation.
  
  
  CONCLUSIONS
  Compared with conventional procedure, arthroscopic surgery for recurrent dislocation of the patella achieves excellent outcomes with minimum invasion.
authors.forename: Bei
authors.initials: B
authors.lastname: Li
authors.forename: Jian-yi
authors.initials: JY
authors.lastname: Tan
authors.forename: Zhi-bin
authors.initials: ZB
authors.lastname: Zeng
authors.forename: Tie-jun
authors.initials: TJ
authors.lastname: Zhan
authors.forename: Hai-qiang
authors.initials: HQ
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D001182:Arthroscopy; D002061:Bursa, Synovial / Q000601:surgery*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D008297:Male; D031222:Patellar Dislocation / Q000503:physiopathology / Q000601:surgery*; D017847:Patellar Ligament / Q000601:surgery*; D016059:Range of Motion, Articular; D016896:Treatment Outcome; D055815:Young Adult