Dynamic versus static reconstruction of the medial patellofemoral ligament for recurrent lateral patellar dislocation.
OBJECTIVE
To compare clinical and radiological outcomes of static and dynamic medial patellofemoral ligament (MPFL) reconstruction techniques.


METHODS
In a retrospective, matched-paired, cohort analysis, 30 patients surgically treated for recurrent lateral patellar dislocation were divided into two groups of 15 patients matched for inclusion and exclusion criteria. The static technique group underwent rigid fixation of the gracilis tendon at the anatomic femoral MPFL insertion and the superomedial border of the patella; the dynamic technique group underwent detachment of the gracilis tendon at the pes anserinus with fixation to the proximal medial patellar margin via tunnel transfer obliquely through the patella. Kujala, Lysholm, and Tegner scores; pain level; and pre- and postoperative radiographic changes of patellar height, patellar tilt, and bisect offset were compared.


RESULTS
No significant between-group differences were found in mean Kujala, Tegner, Lysholm, or visual analogue scale scores or radiographic parameters. One case of resubluxation was observed in the dynamic group. All but one patient in each group would have been willing to undergo the procedure again.


CONCLUSIONS
Both techniques provided satisfactory short-term outcomes.


METHODS
III.
Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany, becher.chris@web.de.
Christoph
C
Becher
Kristian
K
Kley
Philipp
P
Lobenhoffer
Marco
M
Ezechieli
Tomas
T
Smith
Sven
S
Ostermeier
D000293:Adolescent; D000328:Adult; D001178:Arthroplasty / Q000379:methods*; D005260:Female; D005269:Femur / Q000601:surgery; D006801:Humans; D008023:Ligaments, Articular / Q000601:surgery*; D008297:Male; D010329:Patella / Q000601:surgery; D031222:Patellar Dislocation / Q000601:surgery*; D057071:Patellofemoral Joint / Q000601:surgery*; D019651:Plastic Surgery Procedures / Q000379:methods; D012189:Retrospective Studies; D013710:Tendons / Q000637:transplantation; D055815:Young Adult