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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Total knee arthroplasty in a patient with congenital dislocation of the patella: Most authors have reported habitual dislocation in association with shortening of the quadriceps muscle, and consider that lengthening of the tendon is an essential part of the procedure to allow the patella to remain reduced lf the realignment.

Treatment of habitual dislocation of patella in an adult arthritic knee

View at Google Scholar T. In habitual and permanent dislocations of patella, the supero-lateral muscle contracture was the primary pathology. After pulling a suture through the holes the femoral attachment point was found and with the help of a temporary pin in the medial epicondyle, favorable anisometry could be obtained the graft relaxed as the knee was flexed and a Corkscrew suture anchor Arthrex, Naples, FL, USA was put in place.

Radiological examination revealed evidence of patella alta as defined by Insall and Salvati,[ 7 ] and Q angle was 18 degrees. Benoit published their series of 12 cases of habitual dislocation of patella with patella alta.

Habitual dislocation of patella: A review

In habitual dislocation, where flexion of the knee was always associated with displacement of the patella, both lateral contractures and medial laxity were present. If it was not possible to fully flex the knee at this stage, rectus femoris with or without vastus intermedius was lengthened to achieve reduction in full flexion of the knee.

A year-old woman presented with iatrogenic habitual dislocation of left patella from childhood and pain from past 3 years. Further flexion is then possible only if the patella is allowed to dislocate, when a full range of motion is readily obtainable.


J Clin Orthop Trauma.

The first line therapeutic strategy was surgical. Lateral dislocation or subluxation of the patella in children can present in three different forms.

Case Reports in Orthopedics

Factors of patellar instability: Predisposing factors include ligamentous laxity, contracture of the lateral patellar soft tissues, patella alta, quadriceps contractures, hypoplasia of the lateral femoral condyle and dislocatipn valgum bony factors.

It usually presents after the child starts to walk, and is often well tolerated in children, if it is not painful. Restoration of dynamic stability of the patella by pes anserinus transposition. Insall J, Salvati E. Congenital dislocation of the patella. Whether it was dislcoation or due to injection fibrosis; medial laxity or weakness of the medial stabilizers of the patella was secondary.

Tracking was augmented with MPFL reconstruction using semi-tendinosus tendon and patellar end was fixed with 2. We believe that the havitual tissue surgery as primary procedure will buy additional time for patient to delay the TKA and proper soft tissue balancing will improve the longevity and clinical outcome of the definitive procedures. Histological examination in these cases revealed inflammatory cell infiltration, fibrosis and muscle fibre degeneration.

Pathophysiology Various pathological factors have been described in the pathogenesis of habitual dislocation of patella. At final followup ov years postoperatively, the patient was pain-free. Postoperative radiographs anteroposterior a and lateral views b of left knee showing tibial tuberosity transfer fixed with screws and 2. In our case, the patient was a year-old female with moderate degeneration and an active lifestyle.

Very little literature is available on habitual dislocation dialocation patella as most of the studies have combined cases of recurrent dislocation with habitual dislocation.

Criteria which allowed him to return to work were no pain, stability of the patella, no swelling, and full range of motion. Genu valgum, defects of the patella and femoral condyles were also present in a few cases of habitual dislocations. Presentation Lateral dislocation or subluxation of patelpa patella in children can present in three different forms. The preoperative Kujala et al.

Reconstruction of medial patellofemoral ligament for chronic patellar instability. The items for dislocayion, symptoms, and leisure and sports activities were scored Permanent dislocation is usually congenital and refers to an irreducible dislocation present since birth and associated with a lateral position of the entire quadriceps mechanism.


Few cases of habityal dislocations have been reported [ 7 ]. Habitual patellar dislocations are rare in adults. A number of patients had history of intramuscular injections in the thigh in the neonatal period leading to contractures later on.

The major intra-operative finding was contracture of the lateral patellar retinaculum with fibrotic habitial in the superolateral aspect of patella. This article has been cited by other articles in PMC. An MRI or ultrasound might have shown features of the MPFL and the attachment of the vastus medialis internus on the patella, but these results were not available for the preoperative work-up.

Preliminary experience with a method of quadricepsplasty in recurrent subluxation of the patella. Most of their patients had satisfactory result with great improvement in function after surgery. We adjusted the length of the graft by taking into account engagement of the patella and by obtaining full range of motion in the knee.

Nil Uabitual of Interest: Unconstrained TKA with extensive soft tissue release in the habitua, knee failed after 14 months.

The rest of the clinical examination, in particular the neurological, muscular, and tendon results were normal. They believed that even in the presence of severe ligamentous laxity, development of the trochlear groove could be expected during the remaining growth when the patella is realigned at a young age. In the past three years, the patient had been having trouble walking, could not squat down, or go up and down stairs. Disorders of patellofemoral joint.

He noted that habitual dislocation was not seen in all cases in which vastus lateralis and the iliotibial tract were contracted. During surgery patellq adjusted graft tension with a pin in the medial epicondyle attachment.