Relative role changing of lateral collateral ligament on the posterolateral rotatory instability according to the knee flexion angles: A biomechanical comparative study of role of lateral collateral ligament and popliteofibular ligament

Hong Chul Lim, Ji Hoon Bae, Tae Soo Bae, Byung Chul Moon, Ashok K. Shyam, Joon Ho Wang

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7 Citations (Scopus)

Abstract

Purpose This cadaveric study assessed the relative role of the lateral collateral ligament (LCL) and popliteofibular ligament (PFL) in limiting tibia external rotation. Methods Eight paired cadaveric knees were divided into two groups. The specimens were mounted on a rotational wheel and 5 Nm external rotation torque was applied before and after cutting the ligaments at 0°-30°-60°-90° knee flexion. Three cutting steps were applied: (1) PT (popliteus tendon)-, (2) LCL-, (3) PFL in group I, and (1) PT-, (2) PFL-, (3)LCL in group II. Increased external rotation at each step was taken as the ratio of final external rotation at the end of step 3. Repeated measure ANOVA and a Mann-Whitney U test were used for statistical analysis. Results At step 2, the ratio of increased external rotation after cutting the LCL (group I) was similar to the ratio after cutting the PFL (group II) at 0° and 30° flexion, but that of group I was lower than group II at 60° and 90° flexion (p = 0.029 and p = 0.029). At step-3, the ratio after cutting the LCL (group II) was less than the ratio after cutting the PFL (group I) at 90° flexion (p = 0.029). Conclusion The PFL and LCL play equally important roles in limiting external rotation at the knee extended position (0°, 30°) but the LCL contribution becomes smaller than PFL at the flexed position (60°, 90°).

Original languageEnglish
Pages (from-to)1631-1636
Number of pages6
JournalArchives of Orthopaedic and Trauma Surgery
Volume132
Issue number11
DOIs
Publication statusPublished - 2012 Nov 1

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Ankle Lateral Ligament
Ligaments
Knee
Tendons
Torque
Nonparametric Statistics
Tibia
Analysis of Variance

Keywords

  • Lateral collateral ligament
  • Popliteofibular ligament
  • Popliteus tendon
  • Posterolateral rotatory instability

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

@article{c65a521326ba4c29b4467308b568caaa,
title = "Relative role changing of lateral collateral ligament on the posterolateral rotatory instability according to the knee flexion angles: A biomechanical comparative study of role of lateral collateral ligament and popliteofibular ligament",
abstract = "Purpose This cadaveric study assessed the relative role of the lateral collateral ligament (LCL) and popliteofibular ligament (PFL) in limiting tibia external rotation. Methods Eight paired cadaveric knees were divided into two groups. The specimens were mounted on a rotational wheel and 5 Nm external rotation torque was applied before and after cutting the ligaments at 0°-30°-60°-90° knee flexion. Three cutting steps were applied: (1) PT (popliteus tendon)-, (2) LCL-, (3) PFL in group I, and (1) PT-, (2) PFL-, (3)LCL in group II. Increased external rotation at each step was taken as the ratio of final external rotation at the end of step 3. Repeated measure ANOVA and a Mann-Whitney U test were used for statistical analysis. Results At step 2, the ratio of increased external rotation after cutting the LCL (group I) was similar to the ratio after cutting the PFL (group II) at 0° and 30° flexion, but that of group I was lower than group II at 60° and 90° flexion (p = 0.029 and p = 0.029). At step-3, the ratio after cutting the LCL (group II) was less than the ratio after cutting the PFL (group I) at 90° flexion (p = 0.029). Conclusion The PFL and LCL play equally important roles in limiting external rotation at the knee extended position (0°, 30°) but the LCL contribution becomes smaller than PFL at the flexed position (60°, 90°).",
keywords = "Lateral collateral ligament, Popliteofibular ligament, Popliteus tendon, Posterolateral rotatory instability",
author = "Lim, {Hong Chul} and Bae, {Ji Hoon} and Bae, {Tae Soo} and Moon, {Byung Chul} and Shyam, {Ashok K.} and Wang, {Joon Ho}",
year = "2012",
month = "11",
day = "1",
doi = "10.1007/s00402-012-1591-7",
language = "English",
volume = "132",
pages = "1631--1636",
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number = "11",

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TY - JOUR

T1 - Relative role changing of lateral collateral ligament on the posterolateral rotatory instability according to the knee flexion angles

T2 - A biomechanical comparative study of role of lateral collateral ligament and popliteofibular ligament

AU - Lim, Hong Chul

AU - Bae, Ji Hoon

AU - Bae, Tae Soo

AU - Moon, Byung Chul

AU - Shyam, Ashok K.

AU - Wang, Joon Ho

PY - 2012/11/1

Y1 - 2012/11/1

N2 - Purpose This cadaveric study assessed the relative role of the lateral collateral ligament (LCL) and popliteofibular ligament (PFL) in limiting tibia external rotation. Methods Eight paired cadaveric knees were divided into two groups. The specimens were mounted on a rotational wheel and 5 Nm external rotation torque was applied before and after cutting the ligaments at 0°-30°-60°-90° knee flexion. Three cutting steps were applied: (1) PT (popliteus tendon)-, (2) LCL-, (3) PFL in group I, and (1) PT-, (2) PFL-, (3)LCL in group II. Increased external rotation at each step was taken as the ratio of final external rotation at the end of step 3. Repeated measure ANOVA and a Mann-Whitney U test were used for statistical analysis. Results At step 2, the ratio of increased external rotation after cutting the LCL (group I) was similar to the ratio after cutting the PFL (group II) at 0° and 30° flexion, but that of group I was lower than group II at 60° and 90° flexion (p = 0.029 and p = 0.029). At step-3, the ratio after cutting the LCL (group II) was less than the ratio after cutting the PFL (group I) at 90° flexion (p = 0.029). Conclusion The PFL and LCL play equally important roles in limiting external rotation at the knee extended position (0°, 30°) but the LCL contribution becomes smaller than PFL at the flexed position (60°, 90°).

AB - Purpose This cadaveric study assessed the relative role of the lateral collateral ligament (LCL) and popliteofibular ligament (PFL) in limiting tibia external rotation. Methods Eight paired cadaveric knees were divided into two groups. The specimens were mounted on a rotational wheel and 5 Nm external rotation torque was applied before and after cutting the ligaments at 0°-30°-60°-90° knee flexion. Three cutting steps were applied: (1) PT (popliteus tendon)-, (2) LCL-, (3) PFL in group I, and (1) PT-, (2) PFL-, (3)LCL in group II. Increased external rotation at each step was taken as the ratio of final external rotation at the end of step 3. Repeated measure ANOVA and a Mann-Whitney U test were used for statistical analysis. Results At step 2, the ratio of increased external rotation after cutting the LCL (group I) was similar to the ratio after cutting the PFL (group II) at 0° and 30° flexion, but that of group I was lower than group II at 60° and 90° flexion (p = 0.029 and p = 0.029). At step-3, the ratio after cutting the LCL (group II) was less than the ratio after cutting the PFL (group I) at 90° flexion (p = 0.029). Conclusion The PFL and LCL play equally important roles in limiting external rotation at the knee extended position (0°, 30°) but the LCL contribution becomes smaller than PFL at the flexed position (60°, 90°).

KW - Lateral collateral ligament

KW - Popliteofibular ligament

KW - Popliteus tendon

KW - Posterolateral rotatory instability

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U2 - 10.1007/s00402-012-1591-7

DO - 10.1007/s00402-012-1591-7

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AN - SCOPUS:84868112303

VL - 132

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JO - Archiv fur orthopadische und Unfall-Chirurgie

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SN - 0003-9330

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