Comparative effects of monopolar radiofrequency energy and conservative management of mechanical properties of elongated lateral collateral ligament in rabbits: an experimental study

Objective. We examined the biomechanical effects of shrinkage in elongated rabbit lateral collateral ligament. Design. This study was designed in an attempt to evaluate the energy effects of monopolar radiofrequency on strained but not ruptured ligaments. Background. In treatment of ligament injurie...

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Bibliographic Details
Published in:Clinical biomechanics (Bristol) 2004-02, Vol.19 (2), p.184-189
Main Authors: Ilhami, Kuru, Eray, Bozan M., Gokhan, Maralcan, Ulukan, Inan, Levent, Altınel
Format: Article
Language:English
Subjects:
Animals
Biomechanical Phenomena
Disease Models, Animal
Elasticity
Elongated ligament
Hyperthermia, Induced - methods
Joint Instability - prevention & control
Joint Instability - therapy
Knee Joint - physiopathology
Ligament shrinkage
Male
Medial Collateral Ligament, Knee - physiopathology
Probability
Rabbits
Radio Waves - therapeutic use
Range of Motion, Articular - physiology
Sensitivity and Specificity
Shrinkage
Statistics, Nonparametric
Stress, Mechanical
Tensile Strength
Thermal application
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Summary:Objective. We examined the biomechanical effects of shrinkage in elongated rabbit lateral collateral ligament. Design. This study was designed in an attempt to evaluate the energy effects of monopolar radiofrequency on strained but not ruptured ligaments. Background. In treatment of ligament injuries difficulty in reducing increased laxity after trauma and recurrence of instability are important factors for failure. Methods. Ligament elongation and laxity were achieved in operating room by applying varus stress for multiple times. In Group C ( n=8), elongated lateral collateral ligaments were treated only with above-knee cast, while in Group S ( n=8), they were treated with shrinkage and above-knee casts. The un-operated sides were labeled as control groups. At the 12th week after surgery the animals were sacrificed and hind limbs were disarticulated. Removing the other soft tissues around knee, only lateral collateral ligaments were left intact. Biomechanical analyses of the effects of two different treatment methods were compared by performing a pulling-out test. Results. Considering maximum load and stiffness, conservatively treated ligaments were stronger and stiffer than shrunken ligaments ( P
ISSN:0268-0033
1879-1271
DOI:10.1016/j.clinbiomech.2003.10.011