Rotational Subluxation Patterns on Stress Radiography and Clinical Relevance in PCL-Deficient Knees: A 2D-3D Registration Study
Younghoon Yang, Young Tak Cho, Jang Whan Bai, Yu-Seok Kim, Ji In Kim, Joon Ho Wang · 2026
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Description
Younghoon Yang leads a 2026 imaging study of rotational subluxation patterns in knees lacking a working posterior cruciate ligament, a major knee stabilizer. In such knees the shin bone can slip backward and rotate under stress. The team reviewed 127 patients who had primary ligament reconstruction. Three-dimensional models from postoperative CT scans were registered onto preoperative stress X-rays to measure backward translation of each side of the knee joint and classify the rotation pattern.
Posteromedial subluxation, slipping toward the inner back, was far more common, in ninety-three cases or 73.2 percent, than posterolateral slipping, in thirty-four cases. Rotational laxity was greater in the posteromedial group. A positive dial test, a physical exam for corner injury, was associated with overall posterior laxity but not with rotational laxity. The authors warn against overtreatment based on rotation tests alone.
Catalog record
| CREATOR | Younghoon Yang, Young Tak Cho, Jang Whan Bai, Yu-Seok Kim, Ji In Kim, Joon Ho Wang |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 50565 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |