Jumping patella is associated with inferior clinical outcomes after MPFL reconstruction for recurrent patellar dislocation: a retrospective cohort study
Daofeng Wang, Yang Liu, Zhengjie Tang, Zhijun Zhang, Hui Zhang · 2026
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Description
Daofeng Wang and four co-authors study a kneecap that jumps rather than glides, and find it forecasts worse results after stabilizing surgery. In recurrent patellar dislocation, some kneecaps visibly jolt sideways during movement, a sign previously linked to several bony abnormalities. Whether the sign predicts surgical outcome was unknown.
Eighty-five patients operated on between twenty eighteen and twenty twenty-two were split by whether the jumping sign was present before surgery. CT scans measured leg torsion and bone shape, and regression identified which abnormalities drive the jumping pattern. Outcomes at final follow-up were then compared between the jumping and gliding groups, with subgroup checks by procedure type. The jumping group fared worse, making the sign a cheap pre-operative warning.
Catalog record
| CREATOR | Daofeng Wang, Yang Liu, Zhengjie Tang, Zhijun Zhang, Hui Zhang |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 43 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |