[Comparison of clinical results between an isometric and an anatomic technique for medial patellofemoral ligament reconstruction].
OBJECTIVE
To compare the clinical results of single-stranded isometric with double-stranded anatomic reconstruction of medial patellofemoral ligament (MPFL) for recurrent patellar dislocation.


METHODS
Retrospective analysis of 60 consecutive patients (72 knees) with recurrent patellar dislocation underwent medial patellofemoral ligament reconstruction between August 2004 and October 2008, 22 cases (27 knees) with single-stranded isometric reconstruction, 38 cases (45 knees) with double-stranded anatomic reconstruction. Postoperatively patellar stability was examined, and recurrent rate was recorded. Patellar lateral shift ratio and tilt were measured on CT scans. Knee function was evaluated with subjective questionnaire and the Kujala score.


RESULTS
All patients were followed up for more than 12 months without recurrent redislocation. (1) Recurrent instability rate was 18.5% in single-stranded group and 2.2% in double-stranded group, with statistical difference (P < 0.05). (2) The patellar tilt and lateral shift ratio returned to normal, without statistical difference between groups (P > 0.05). (3) The Kujala score were 59 ± 9 and 62 ± 9 preoperatively and 87 ± 4 and 94 ± 6 postoperatively in single- and double-stranded group, with statistical difference (P < 0.05). (4) The excellect rate was 85.2% in single-stranded group, 97.8% in double-stranded group, with statistical difference(P < 0.05).


CONCLUSIONS
Both reconstruction can improve patellar stability and knee function significantly, with double-stranded anatomic reconstruction better in clinic evaluation.
Department of Joint Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang 050051, China.
Fei
F
Wang
Bai-cheng
BC
Chen
Hui-jun
HJ
Kang
Jun
J
Wang
Hu
H
Liu
Jiang-tao
JT
Dong
D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D017888:Medial Collateral Ligament, Knee / Q000601:surgery*; D031222:Patellar Dislocation / Q000601:surgery*; D017847:Patellar Ligament / Q000601:surgery*; D019651:Plastic Surgery Procedures / Q000379:methods*; D012189:Retrospective Studies; D016896:Treatment Outcome; D055815:Young Adult