First, Gradual increase in PI is described throughout the lifespan that is paralleled by an increase in SFD, and is not by an increase in the SS. This represents a morphologic change of the pelvis. Second, Patients with symptomatic deformity of the spine present an increased C7P, thoracic hypokyphosis, reduced LL, and signs of pelvic retroversion (decreased LL and SS; increased SFD).
Patellofemoral instability is a common problem in the adolescent population. Patellar stability depends on a dynamic interplay between bony and soft tissue restraints. Several pathoanatomical factors increase the likelihood of patellar instability: patella alta, trochlear dysplasia, malalignment, and deficient proximal medial restraints. Treatment for first-time patella dislocations is typically nonoperative and includes bracing, early range of motion, and physical therapy. The only absolute indication for early surgery is a large osteochondral fragment that can be fixed. Surgical stabilization is indicated for chronic patellar instability and includes both proximal and distal realignment options. Medial patellofemoral ligament reconstruction is the treatment of choice in most adolescent patients with patella instability. Distal bony realignment procedures are reserved for skeletally mature adolescents.
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