The traumatic factor plays a prominent rôle in this condition. Two types of cases are noted: (1) the. Academic Surgeons. Upstate Orthopedics, LLP – Upstate Medical University Department of Orthopedic Surgery in Syracuse, NY is seeking a BC/BE Surgeons in. Habitual dislocation of patella. 1. Case Presentation Habitual Dislocation of Patella Dr Sushil Sharma First Year MS Orthopaedic Resident; 2.

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It is usually symptomatic when detected in adults with major symptom of patella-femoral pain and weakness during running or climbing stairs, crepitus, and joint effusion. Pes anserinus transposition for patellar dislocation. Numerous studies have had good midterm results at least 1-year follow-up with MPFL reconstruction.


Whether it was idiopathic or due to injection fibrosis; medial laxity or weakness of the medial stabilizers of the patella was secondary. Most cases presented between the ages of 5 and 12 years when the femur is growing disproportionately to the quadriceps. Open surgery was performed associating lateral retinacular release, reconstruction of the medial patellofemoral ligament with an ipsilateral gracilis tendon graft.

The medial border of the patella was calcified.

Most of their patients had satisfactory result with great improvement in function after surgery. The preoperative Kujala et al.

Habitual dislocation of patella: A review

The trochlear morphology groove and depth was normal as well as the height of the patella with Caton-Deschamps index equal to 1 [ 8 ]. Please review our privacy policy. No predisposing factor was found [ 4 ]. Extensor lag was always present whenever rectus femoris was lengthened which resolved in due course of time with physiotherapy.


Lengthening of the rectus femoris tendon was also required in many cases in their series. The corrective surgery for habitual dislocation involved release dislocarion any superolateral contracture, until the patella remained in the intercondylar groove in the fully flexed position of the knee. Many different surgical techniques have been described in the literature for the treatment of habitual dislocation of patella.

Depending on the pathology; medial plication, og of vastus medialis across the anterior surface of the patella, patellar tendon habitua or transfer of sartorius to the patella was added.

Habitual dislocation of patella is a condition where the patella dislocates whenever the knee is flexed and spontaneously relocates with extension of the knee. The contractures were mainly seen in the vastus lateralis the main contributor in over half the cases and rarely in the iliotibial band or rectus femoris.

She recalled a childhood surgery over middle third of left thigh incision and drainage.

Quadriceps tendon was lengthened using V Y plasty at aponeurotic junction. Redislocation was seen in a few cases and was due to either rectus lengthening not being performed at initial surgery or failure to realign distally when a lateral patellar tendon insertion was detectable clinically, or reformation of contractures. Due to shortening of the extensor mechanism, the patella could not be reduced.

Habitual dislocation of patella: A review

Postoperative radiographs anteroposterior a and lateral views b of left hzbitual showing tibial tuberosity transfer fixed with screws and 2. Pathophysiology Various pathological factors have been described in the pathogenesis of habitual dislocation of patella. Permanent patellar dislocation, either congenital or acquired, is diagnosed at an early age in childhood and numerous surgical techniques have been introduced for its treatment. Patella tilt was increased in a lateral view during pwtella of the quadriceps but the morphology of the patella was normal.


The injuries had not affected skeletal development during growth. The origin of recurrent patellar instability is usually posttraumatic. Stretching of the vastus medialis tendon was associated with the laxity of the medial capsule in these patients. A year-old man consulted for limping.

Morphological assessment of the patellofemoral compartment did not reveal any signs of dysplasia. Clinically and radiologically Grade III Kellgren and Lawrence classification[ 8 ] tricompartmental degenerative patel,a arthritis was appreciated [ Figure 1 ].

He did remember neither precise diagnosis nor functional or surgical previous treatment. Treatment A number of reconstructive procedures have been described in the literature for the management of patellar instability.

Treatment of habitual dislocation of patella in an adult arthritic knee

He also noted that quadriceps fibrosis involving the rectus femoris and vastus intermedius alone would result in an elevated and hypoplastic patella. Bakshi described the difference in the pathology of recurrent and habitual dislocations.

A few complications were seen that included wound haematoma, lateral popliteal nerve palsy and wound dehiscence. If patella still dislocates after full flexion dislocqtion achieved, distal realignment is added.