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· DOS Abstracts
Alarmingly high failure rate after Medial
Patellofemoral Ligament reconstructions. A
retrospective nationwide epidemiological study with
a 10 year follow up on surgical intervention and 2.572 Medial
Patellofemoral Ligament reconstruction surgeries
Kasper Skriver Gravesen, Anders Troelsen, Lars Blønd, Kristoffer Weisskirchner
Barfod
Dept. of Orthopedic Surgery, Clinical Orthopedic Research Hvidovre (CORH), Copenhagen
University Hospital Hvidovre; Dept. of Orthopedic Surgery, Clinical Orthopedic Research
Hvidovre (CORH), Copenhagen University Hospital Hvidovre; Dept. of Orthopedic
Surgery, Zealand University Hospital Køge and Aleris-Hamlet Parken; Dept. of Orthopedic
Surgery, Clinical Orthopedic Research Hvidovre (CORH), Copenhagen University Hospital
Hvidovre
Background:
No reliable epidemiological data was found in both trends in patellar stabi-
lizing surgery and in the risk of recurrent patellar dislocation.
Purpose / Aim of Study:
To evaluate the trends in treatment of patellar dislocations in
the Danish population as a whole from 1996 to 2014.
Materials and Methods:
This descriptive epidemiological study was performed by ret-
rospectively searching the Danish National Patients Registry from 1996 to 2014. The
study investigated the trends in surgery performed on patients with patellar dislocations
and the risk of recurrent dislocation with a 10 year follow up. National population data
were collected at the services of Statistics Denmark. Risk estimates were calculated by
cox proportional hazard models, all analysis was done in R 3.2.2.
Findings / Results:
The 10-year overall risk of recurrent dislocation after a Medial
Patellofemoral Ligament (MPFL) reconstruction was 21% when investigating 2.572
MPFL- reconstructions performed from 2005 until 2014. The conservatively treated
patients had a 31% risk and patients treated with other patellar stabilizing surgery had
36%. From 1996 until 2013 the amount of patellar stabilizing surgery was stable but
with a rise in MPFL-reconstruction surgeries from 2005. In 2013 MPFL-reconstruction
surgery constituted 75% of all patella stabilizing surgery and was performed on almost
10% of patients with patellar dislocation.
Conclusions:
A rapid rise in MPFL-reconstruction was found over time with little effect
on risk of recurrent dislocation. The overall risk of recurrent dislocation after MPFL- re-
construction was 21% compared to 31% after conservative treatment and 36% after
other stabilizing surgery. These findings could indicate that the underlying pathomor-
phology for the patella dislocation have to be examined and corrected concomitant to
reconstructions of the MPFL.
No conflicts of interest reported
87.