Comparative effects of monopolar radiofrequency energy and conservative management of mechanical properties of elongated lateral collateral ligament in rabbits: an experimental study
Comparative effects of monopolar radiofrequency energy and conservative management of mechanical properties of elongated lateral collateral ligament in rabbits: an experimental study
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DOI：
10.1016/j.clinbiomech.2003.10.011
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发表时间：
2004-02-01
影响因子：
1.8
通讯作者：
Levent, A
中科院分区：
文献类型：
--
作者：
Ilhami, K;Eray, BM;Levent, A
Objective.我们研究了收缩对拉长的兔外侧副韧带的生物力学影响。本研究旨在评估单极射频对张力但未断裂韧带的能量效应。在韧带损伤的治疗中，难以减少创伤后增加的松弛和不稳定的复发是失败的重要因素。在手术室通过多次施加内翻应力实现韧带延长和松弛。C组（n = 8）仅行膝上石膏固定，S组（n = 8）行缩窄加膝上石膏固定。将未手术侧标记为对照组。术后第12周处死动物，离断后肢。切除膝关节周围其他软组织，仅保留外侧副韧带。通过拔出试验比较两种不同治疗方法的生物力学效果。在最大载荷和刚度方面，保守治疗的韧带强度和刚度均高于收缩的韧带（P < 0.05）。两种治疗方法均改变了生物力学值。反映了分子内结构的改变，主要的改变是收缩韧带的强度下降。在韧带损伤中，我们得出结论，收缩术并不上级于保守治疗。
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 < 0.05).Conclusion. Biomechanical values were altered by both treatment methods. Reflecting an alteration in intra-molecular structure, the main alteration was the decrease of strength in shrunken ligaments. In ligament injuries, we concluded shrinkage not to be superior to conservative treatment.