Internal bracing with an artificial ligament for superficial medial collateral ligament injury impairs the mechanical property of repaired native ligament: A porcine study

Takahashi, Tsuneari; Kubo, Tatsuya; Kimura, Masashi; Takeshita, Katsushi

doi:10.1016/j.jos.2020.08.012

Cited by 4 publications

(15 citation statements)

References 16 publications

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“…Of note, it is important to keep in mind that the findings from the present study were done at time zero. A recent study from Takahashi et al evaluated MCL failure, in a porcine model, after the MCL had been cyclically loaded during normal daily activities of the animal [22]. The study demonstrated that the MCL which had been augmented with an internal brace construct failed differently than the MCL without augmentation.…”

Section: Discussionmentioning

confidence: 99%

An MCL internal brace can withstand cyclic fatigue loading and produce a valgus load to failure similar to that of intact knees

Tompkins

Williams

Bechtold

2023

Knee Surg Sports Traumatol Arthrosc

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PurposeThe purpose of this study is to report on the biomechanical durability and strength of an MCL internal brace construct. The null hypothesis is that there will be no difference between this construct and the intact MCL in terms of deflection during fatigue testing and the ultimate failure load. MethodsEight cadaver knees were used. A grade 3 equivalent MCL tear was created with both the superficial and deep femoral MCL severed. An internal brace was created by placing a cortical button and loop through the center of the femoral MCL origin and secured on the lateral cortex of the distal femur. A FiberTape (Arthrex, Naples, FL) was looped through the cortical button loop and was secured in the center of the tibial insertion of the MCL. After pre‐cycling, the specimens underwent 1000 cycles of compressive load between 100 and 300 N, using four point bending testing into direct valgus. Pre and post testing deflection was measured using three dimensional motion data from two sets of reflective markers. A load‐to‐failure test was then conducted with failure defined as the first significant decrease in the load–displacement curve. ResultsThe mean increase in deflection between pre‐ and post‐testing was 0.6° (SD ± 0.3°). The mean failure bending moment was 122.4 Nm (SD ± 29 Nm). ConclusionThe internal brace construct employed in this study was able to withstand cyclic fatigue loading and recorded a valgus load to failure similar to that of intact knees. It is important for clinicians who are considering using this commercially available technique to be aware of how the construct performs under cyclic loading compared to the intact MCL.

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Section: Discussionmentioning

confidence: 99%

An MCL internal brace can withstand cyclic fatigue loading and produce a valgus load to failure similar to that of intact knees

Tompkins

Williams

Bechtold

2023

Knee Surg Sports Traumatol Arthrosc

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show abstract

“…The tibial neck and femoral head were cut off, and the bone shafts were set into aluminum tubes with cement. 6 , 7 Each specimen was randomly assigned to a group: (1) ACL reconstruction with unaddressed MMRL (Group U; n = 10) or (2) ACL reconstruction with repaired MMRL (Group R; n = 12).…”

Section: Methodsmentioning

confidence: 99%

“…This measurement system was the same as that used in previous biomechanical studies using large animals. 6 , 7 , 8 The tibia was flexed at 90° against the femur. 9 Before testing, the specimen was preconditioned with a static preload of 5 N for 30 seconds, 11 followed by 2,000 cycles of loading between 0 and 100 N with a cross-head speed of 100 mm/min, to simulate the tibial anterior drawer setting ( Fig 5 A).…”

Section: Methodsmentioning

confidence: 99%

“…These conditions have frequently been used for measurement in previous studies with large animal models. 6 , 7 , 8 , 12 , 13 , 14

Fig 5 Femur–graft–tibia complex specimen mounted on a tensile tester with a set of specially designed grips. (A) Cyclic loading to simulate the tibial anterior drawer setting was applied with 90° of knee flexion.…”

Section: Methodsmentioning

confidence: 99%

“…These conditions have frequently been used for measurement in previous studies with large animal models. [6][7][8][12][13][14] Failure modes were recorded. A loadeelongation curve was created using same software.…”

Section: Biomechanical Testing Of the Femureacletibia (Fat) Complexmentioning

confidence: 99%

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Medial Meniscal Ramp Lesion Repair Concomitant With Anterior Cruciate Ligament Reconstruction Did Not Contribute to Better Anterior Knee Stability and Structural Properties After Cyclic Loading: A Porcine Model

Matsumoto

Takahashi

Hatayama

et al. 2021

Arthroscopy, Sports Medicine, and Rehabilitation

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Purpose: To investigate the biomechanical efficacy of medial meniscal ramp lesion (MMRL) repair in anterior cruciate ligament (ACL) reconstruction regarding the graft protection effect after cyclic loading. Methods: Specimens were randomized into 2 groups: (1) ACL reconstruction with unaddressed MMRL (Group U; n ¼ 10), and (2) ACL reconstruction with repaired MMRL (Group R; n ¼ 12). The specimens were tested cyclically (2,000 cycles, 0-40 N, 100 mm/ min) in the direction of the native ACL and loaded to failure (100 mm/min) on a tensile tester. Statistically significant differences between the structural properties (length changes and anterior translations at the 100th, 500th, 1,000th, 1,500th, and 2,000th cycles, upper yield load, maximum load, linear stiffness, and elongation at failure) under cyclic loading and single-cycle loading were analyzed. Results: There were no significant differences in length changes and anterior translations at the 100th, 500th, 1,000th, 1,500th, and 2,000th cycles. There were no significant differences in upper yield load (82.4

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Material Properties of Suture Augmentation of Knee Medial Collateral Ligament Repair Did Not Influence Length Changes or Failure Loads in a Caged Porcine Model

Kubo¹,

Takahashi²,

Saitsu³

et al. 2023

Arthroscopy, Sports Medicine, and Rehabilitation

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Internal bracing with an artificial ligament for superficial medial collateral ligament injury impairs the mechanical property of repaired native ligament: A porcine study

Cited by 4 publications

References 16 publications

An MCL internal brace can withstand cyclic fatigue loading and produce a valgus load to failure similar to that of intact knees

An MCL internal brace can withstand cyclic fatigue loading and produce a valgus load to failure similar to that of intact knees

Medial Meniscal Ramp Lesion Repair Concomitant With Anterior Cruciate Ligament Reconstruction Did Not Contribute to Better Anterior Knee Stability and Structural Properties After Cyclic Loading: A Porcine Model

Material Properties of Suture Augmentation of Knee Medial Collateral Ligament Repair Did Not Influence Length Changes or Failure Loads in a Caged Porcine Model

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