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Muscles that Move the Leg

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Related Experiment Video

Updated: Mar 29, 2026

Author Spotlight: Bridging the Gap Between In Vivo and Ex Vivo Studies with the "Avatar" Technique to Advance Muscle Mechanics Research

Published on: August 18, 2023

Extensor Mechanism Disruption in Knee Dislocation.

Michael O'Malley¹, Patrick Reardon¹, Ayoosh Pareek¹

¹Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota.

The Journal of Knee Surgery

|December 5, 2015

Summary

This summary is machine-generated.

Knee extensor mechanism disruption, though rare in knee dislocations, requires prompt repair. A novel semitendinosus autograft technique offers advantages for acute extensor tendon ruptures.

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Area of Science:

Orthopedic Surgery
Sports Medicine
Traumatology

Background:

Knee extensor mechanism disruption presents complex treatment challenges with no established consensus.
These injuries, including quadriceps or patellar tendon ruptures, are uncommon but critical in knee dislocations.

Observation:

Acute, complete tendon ruptures require primary repair, potentially with augmentation.
Partial tears with extensor lag or failed nonoperative management also necessitate surgical intervention.
Tendon augmentation is employed when native tissue is insufficient or after prior repair failure.

Findings:

This study investigates extensor mechanism disruption incidence, patterns, and surgical treatments.
A novel technique involves primary tendon repair augmented with a semitendinosus autograft.
This augmentation uses a distal or proximal patellar socket for quadriceps or patellar tendon repair.

Implications:

Augmentation offers accelerated rehabilitation and reduces risks of patellar fracture and hardware complications.
The semitendinosus autograft technique is recommended for specific acute extensor mechanism disruptions.
Consideration of this technique is advised in cases of acute extensor mechanism disruption associated with tibiofemoral dislocation.