Acute patellar dislocation: how skeletal maturity affects patterns of injury.

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Abstract

[Indexed for MEDLINE] 19. Case Rep Orthop. 2014;2014:647272. doi: 10.1155/2014/647272. Epub 2014 Mar 4. Treatment of habitual patellar dislocation in an adult by isolated medial patellofemoral ligament reconstruction. Bohu Y(1), Thaunat M(2), Lefevre N(3), Klouche S(3), Herman S(3), Catonné Y(2). Author information: (1)Groupe Hospitalier Universitaire La Pitié Salpêtrière, AP-HP, 75013 Paris, France ; Institut de l'Appareil Locomoteur Nollet, 75017 Paris, France ; Clinique du Sport Paris V, 75005 Paris, France. (2)Groupe Hospitalier Universitaire La Pitié Salpêtrière, AP-HP, 75013 Paris, France. (3)Institut de l'Appareil Locomoteur Nollet, 75017 Paris, France ; Clinique du Sport Paris V, 75005 Paris, France. Habitual patellar dislocations are rare in adults. Treatment is difficult, and often associated with significant morbidity. A 30-year-old man, construction worker, presented a habitual patellofemoral dislocation which was caused by direct trauma to the knee as a child. Clinical examination showed a 3 cm leg-length discrepancy with no rotational deformities. The patient had a limp and loss of function; the patella was dislocated laterally and had locked at 20° of flexion with a range of motion of 0°/0°/30°. Open surgery was performed associating lateral retinacular release, reconstruction of the medial patellofemoral ligament with an ipsilateral gracilis tendon graft. The postoperative course was simple with no complications. Four months after surgery the patient has begun working normally. At the final 50-month clinical follow-up, knee range of motion was 0°/0°/130°, and functional results were excellent on clinical assessment scores of Kujala, Lysholm, and subjective IKDC. MPFL reconstruction alone seems effective in habitual posttraumatic patellar dislocation in adults without any associated bone anomalies. DOI: 10.1155/2014/647272 PMCID: PMC3971556