Numerous anatomic factors have been shown to contribute to patellar instability. Patellar height remains a critical, yet underappreciated contributor to instability that is amenable to surgical correction through the performance of a tibial tubercle distalization osteotomy (TTDO).
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Patella Alta: A Comprehensive Review of Current Knowledge

We systematically reviewed patella alta with respect to type of measurements, reported cutoff values, cutoff values for surgical correction, and proposed surgical techniques.
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