Recurrent patella dislocation is a well-recognized complication after primary dislocation of the patellofemoral joint. We propose that acute surgical management of the injury minimizes this risk. Between February 2006 and August 2010 47 patients (49 knees) with a mean age of 17.9 (range 12–31) at the time of surgery who sustained a patellofemoral joint dislocation for the first time were treated with an acute repair of the medial patellofemoral ligament. Patients presenting to our fracture clinic following a primary lateral dislocation of the patella were investigated with an MRI scan and with consent, proceeded to have an examination under anaesthesia and arthroscopy of the injured knee. An easily dislocatable patella in the presence of a confirmed medial patellofemoral ligament rupture was the indication for open repair. All patients treated surgically were followed up for a period of 24–72 months where the primary outcome measure was further dislocation. An evaluation of symptoms, functional recovery, restoration of range of movement and patient satisfaction was made supported by the Lysholm knee score. Our results confirm that acute repair of the medial patella femoral ligament in selected patients reduces the risk of further dislocations and results in a overall good functional outcome and patient satisfaction with minimal complications.
To correlate the surgical and MRI findings in acute lateral patellar dislocation and to determine the accuracy of MRI in identifying location of MFPL injury. it's a retrospective study. Patients with first time dislocation of patella were admitted after reviewing in fracture clinic and MRI was arranged. Surgical repair of MFPL was performed within 2 weeks of injury. Arthroscopy was performed at the same time to remove osteochondral fragments and to confirm the diagnosis by viewing the area of haemorrhage deep to medial retinaculum. MRI was reported by consultant radiologist with a special interest in musculoskeletal system. MRI and surgical finding were compared.Aim
Methods
This is a study of 24 patients (28 Knees) who underwent acute repair for quadriceps and patellar tendon ruptures using Leeds Keio ligament. Four patients had bilateral quadriceps tendon rupture. The mean age of patients was 57.4 years (range from 20 to 85 years) with mean follow-up of 20 months (range from 2 months to 3 years). Four patients (6 knees) were lost in follow-up. Knee injury and Osteoarthritis and Outcome Score (KOOS) and Tegner Lysholm Knee Score were used to evaluate the outcome. Sixteen patients had scores of 80 and above in both scoring systems. The mean flexion was 125° and extension lag of 6.6°. The knees were not immobilised after surgery and patients were encouraged to fully weight bear. One patient had patella fracture secondary to fall although technical error played a part in this. Two patients had bilateral ruptures secondary to fall and one patient had ectopic bone formation. There was no wound infection. This technique permits immediate mobilisation and full weight bearing of the limb. The early results are promising but long term results are yet to be evaluated.
Recent literature suggests MPFL is the primary medial restraint in lateral patellar dislocation and supports acute repair in first lateral dislocations.
In the deceased patients 2 patients had undergone revision and the remaining patients had died of causes unrelated to the surgery with the prosthesis intact. There was 1 permanent ulnar nerve palsy and two deep infections one requiring debridement. Eight of the original 44 primaries required revision, 3 for fractures and 5 for loosening.