An In Vitro Study to Determine the Effectiveness of a Patellar Ligament/Fascia Lata Graft and New Tibial Suture Anchor Points for Extracapsular Stabilization of the Cranial Cruciate Ligament-Deficient Stifle in the Dog

SummaryThe immediate postoperative biomechanical properties of an “underand-over” cranial cruciate ligament (CCL) replacement technique consisting of fascia lata and the lateral onethird of the patellar ligament, were compared with that of a modified intra- and extracapsular “under-and-over-the-top” (UOTT) method. The right CCL in twelve adult dogs was dissected out and replaced with an autograft. The contralateral, intact CCL served as the control. In group A, the graft was secured to the lateral femoral condyle with a spiked washer and screw. In group B the intracapsular graft was secured to the lateral femoro-fabellar ligament, and the remainder to the patellar tendon. Both CCL replacement techniques exhibited a 2.0 ± 0.5 mm anterior drawer immediately after the operation. After skeletonization of the stifles, the length and cross-sectional area of the intact CCL and CCL substitutes were determined. Each bone-ligament unit was tested in linear tension to failure at a fixed distraction rate of 15 mm/s with the stifle in 120° flexion. Data was processed to obtain the corresponding material parameters (modulus, stress and strain in the linear loading region, and energy absorption to maximum load).The immediate postoperative structural and material properties of the “under-and-over” cranial cruciate ligament replacement technique with autogenous fascia lata, were compared to that of a modified intra- and extracapsular “under-and-over-the-top” (UOTT) method. The combined UOT T technique was slightly stronger (6%), but allowed 2.8 ± 0.9 mm more cranial tibial displacement at maximum linear force.

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The single-suture technique for anterior cruciate ligament graft preparation provides similar stability as a three-suture technique: a biomechanical in vitro study in a porcine model

Archives of Orthopaedic and Trauma Surgery ◽

10.1007/s00402-020-03350-5 ◽

2020 ◽

Vol 140 (4) ◽

pp. 511-516 ◽

Cited By ~ 1

Author(s):

Jan Theopold ◽

Stefan Schleifenbaum ◽

Alexander Georgi ◽

Michael Schmidt ◽

Ralf Henkelmann ◽

...

Keyword(s):

Anterior Cruciate Ligament ◽

Porcine Model ◽

Cruciate Ligament ◽

In Vitro Study ◽

Suture Technique ◽

Vitro Study ◽

Anterior Cruciate Ligament Graft ◽

Anterior Cruciate ◽

Single Suture

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Biomechanical Effects of Tibial Plateau Levelling Osteotomy on Joint Instability in Normal Canine Stifles: An In Vitro Study

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0040-1709505 ◽

2020 ◽

Vol 33 (05) ◽

pp. 301-307

Author(s):

Masakazu Shimada ◽

Tetsuya Takagi ◽

Nobuo Kanno ◽

Satoshi Yamakawa ◽

Hiromichi Fujie ◽

...

Keyword(s):

Joint Instability ◽

Tibial Plateau ◽

Cruciate Ligament ◽

Biomechanical Testing ◽

In Vitro Study ◽

Axial Rotation ◽

Testing System ◽

Compression Tests ◽

Cranial Cruciate Ligament

Abstract Objective The aim of the study was to determine the changes in biomechanical characteristics following tibial plateau levelling osteotomy (TPLO) using simulated manual tests. Study Design Twenty-one stifles from healthy Beagle dogs that had undergone TPLO or had not (control) were first tested in the intact form, and then the cranial cruciate ligament (CrCL) was transected in each to provide four test situations: control-intact, control-CrCL-transected, TPLO-intact and TPLO-CrCL-transected. The stifles were then analysed using a robotic joint biomechanical testing system. The craniocaudal drawer, axial rotation and proximal compression tests were applied. Results The craniocaudal displacement during the drawer test was not significantly different between the control-intact and TPLO-intact. However, the displacement was significantly greater in the TPLO-CrCL-transected than in the control-intact. In the axial rotation test, the internal–external (IE) rotation was significantly greater in the TPLO-intact than in the control-intact. Similarly, the IE rotation was significantly greater in the TPLO-CrCL-transected than in the control-CrCL-transected. In the proximal compression test, craniocaudal displacement was not significantly different among the control-intact, TPLO-intact and TPLO-CrCL-transected. Conclusion These findings suggest that TPLO influences the tension of the collateral ligaments and might generate laxity of the tibiofemoral joint. Instability after the osteotomy might be associated with the progression of osteoarthritis.

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