Does the Lateral Cubital Retinaculum Isolation or Repair in the Triceps Tongue Approach Affect Elbow Extension? A Cadaver Study
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View abstract on PubMed
Summary
This summary is machine-generated.The lateral cubital retinaculum (LCR) plays a crucial role in elbow extension. Isolating the LCR during surgery can impair elbow extension, but repair can restore function.
Area Of Science
- Orthopedic Surgery
- Anatomy
- Biomechanics
Background
- The lateral cubital retinaculum (LCR) is theorized to aid elbow extension by connecting the triceps brachii to the ulna.
- Its exact anatomical role and biomechanical function remain incompletely understood.
- Surgical techniques like the triceps fascial tongue approach may risk detaching the LCR insertion.
Purpose Of The Study
- To anatomically characterize the LCR's ulnar insertion.
- To biomechanically assess the impact of LCR isolation on elbow extension during a triceps fascial tongue approach.
- To evaluate the efficacy of LCR repair in restoring elbow extension.
Main Methods
- Anatomical measurements of LCR width and insertion length were taken from 14 cadaveric specimens.
- Biomechanical testing on 10 cadaveric elbows simulated the triceps fascial tongue approach.
- Elbow angles were measured using 3D motion tracking under varying triceps tendon traction (2kg and 4kg) with intact, isolated, and repaired LCR conditions.
Main Results
- LCR width at the olecranon tip measured 18 ± 3 mm, with an ulnar insertion length of 43 ± 5 mm.
- LCR isolation significantly increased elbow flexion under load compared to elevating the triceps only (4° to 7° increase, p < 0.05).
- LCR repair reduced elbow flexion under load compared to isolated LCR (3° to 5° reduction, p < 0.05).
Conclusions
- The LCR's ulnar insertion is anatomically definable and biomechanically significant for elbow extension.
- Isolation of the LCR during the triceps tongue approach can lead to elbow extension deficits.
- Surgical repair of the LCR appears to mitigate these deficits, potentially improving outcomes in elbow surgeries.
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