TY  - JOUR
A1  - Boelch, Sebastian P.
A1  - Gurok, Anna
A1  - Gilbert, Fabian
A1  - Weißenberger, Manuel
A1  - Rudert, Maximilian
A1  - Barthel, Thomas
A1  - Reppenhagen, Stephan
T1  - Why compromise the patella? Five-year follow-up results of medial patellofemoral ligament reconstruction with soft tissue patellar fixation
JF  - International Orthopaedics
N2  - Purpose
This study investigates the redislocation rate and functional outcome at a minimum follow-up of five years after medial patellofemoral ligament (MPFL) reconstruction with soft tissue patellar fixation for patella instability.

Methods
Patients were retrospectively identified and knees were evaluated for trochlea dysplasia according to Dejour, for presence of patella alta and for presence of cartilage lesion at surgery. At a minimum follow-up of five years, information about an incident of redislocation was obtained. Kujala, Lysholm, and Tegner questionnaires as well as range of motion were used to measure functional outcome.

Results
Eighty-nine knees were included. Follow-up rate for redislocation was 79.8% and for functional outcome 58.4%. After a mean follow-up of 5.8 years, the redislocation rate was 5.6%. There was significant improvement of the Kujala score (68.8 to 88.2, p = 0.000) and of the Lysholm score (71.3 to 88.4, p = 0.000). Range of motion at follow-up was 149.0° (115–165). 77.5% of the knees had patella alta and 52.9% trochlear dysplasia types B, C, or D. Patellar cartilage legions were present in 54.2%. Redislocations occurred in knees with trochlear dysplasia type C in combination with patella alta.

Conclusion
MPFL reconstruction with soft tissue patellar fixation leads to significant improvement of knee function and low midterm redislocation rate. Patients with high-grade trochlear dysplasia should be considered for additional osseous correction.
KW  - MPFL
KW  - medial patellofemoral ligament
KW  - patella instability
KW  - patella dislocation
KW  - trochlear dysplasia
KW  - patella alta
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-235751
SN  - 0341-2695
VL  - 45
ER  - 
TY  - JOUR
A1  - Jordan, Martin C.
A1  - Bittrich, Leonie A.
A1  - Fehske, Kai
A1  - Meffert, Rainer H.
A1  - Jansen, Hendrik
T1  - A rare case of Hoffa fracture combined with lateral patellar dislocation
JF  - Trauma Case Reports
N2  - The coronal unicondylar fracture of the distal femur (AO 33-B3) is a rare intraarticular injury within the weight bearing area of the knee, initially described by Albert Hoffa in 1904. We report an unusual combination of a Hoffa fracture with lateral patellar dislocation in a young adult. Our patient sustained the injury by a sudden twist of his leg during sports. He presented clinically with knee swelling, dislocation of the patella, and localized tenderness; unable to bare weight. After plane radiograph confirmed the injury, manual reduction of the patella was done by hyperextension of the knee and medialward pressure. Afterwards, a CT scan and MRI were conducted. The injury was surgically treated with lag-screws, locking-plate and MPFL-reconstruction.
KW  - dislocation
KW  - femur
KW  - fracture
KW  - Hoffa
KW  - MPFL
KW  - patella
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-158315
VL  - 9
ER  -