VEGF-Capturing Aligned Electrospun Polycaprolactone/Gelatin Nanofibers Promote Patellar Ligament Regeneration

2021 ◽  
Author(s):  
Zhengchao Yuan ◽  
Dandan Sheng ◽  
Muhammad Shafiq ◽  
Liping Jiang ◽  
Atta ur Rehman Khan ◽  
...  
Keyword(s):  
Patellar Ligament

Determination of Graft Forces for Cranial Cruciate Ligament Reconstruction in the Dog

1996 ◽  
Vol 09 (04) ◽  
pp. 165-171 ◽  
Author(s):  
D. A. Hulse ◽  
M. R. Slater ◽  
J. F. Hunter ◽  
W. A. Hyman ◽  
B. A. Shelley
Keyword(s):  
Degrees Of Freedom ◽  
Cruciate Ligament ◽  
Insertion Site ◽  
Graft Fixation ◽  
Flexion Angle ◽  
Patellar Ligament ◽  
Graft Material ◽  
Test Apparatus ◽  
Cranial Cruciate Ligament ◽  
Tibial Insertion

SummaryA test apparatus that allowed the stifle to move in five degrees of freedom was used to determine the effect of graft location, graft preload, and flexion angle at the time of graft fixation on the tensile graft forces experienced by a replacement graft material used to simulate reconstruction of the cranial cruciate ligament deficient stifle. Two graft locations (tibial insertion site of the patellar ligament and tibial insertion site of the cranial cruciate ligament), two graft preloads (5 N and 20 N), and three flexion angles at the time of graft fixation (15°, 30° and 90°) were examined. The tibial insertion site and preload did not have as great an effect on graft force as did the flexion angle of the limb at time of graft fixation. Graft forces were highest when reconstructions were performed with the limb in 90° of flexion (ρ <0.0001). This study supports the notion that intracapsular grafts should be fixed with the limb in a normal standing angle.A five degree of freedom test apparatus was used to evaluate the effect of graft location, graft preload, and limb flexion angle at time of graft fixation on reconstructions of the cranial cruciate ligament deficient stifle. Our results suggest that intracapsular grafts should not be fixed with the limb in 90° of flexion, but in a normal standing angle.

An in vitro Comparison of Two Replacement Techniques Utilizing Fascia Lata after Cranial Cruciate Ligament Transection in the Dog

1993 ◽  
Vol 06 (02) ◽  
pp. 85-92 ◽  
Author(s):  
G. L. Coetzee
Keyword(s):  
Femoral Condyle ◽  
Cruciate Ligament ◽  
Maximum Load ◽  
Fascia Lata ◽  
Patellar Ligament ◽  
Cross Sectional ◽  
Cranial Cruciate Ligament ◽  
Replacement Technique ◽  
Over The Top

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.

Histology of Coated Carbon Fibres Implanted in the Canine Patellar Ligament

1989 ◽  
Vol 02 (02) ◽  
pp. 59-66 ◽  
Author(s):  
G. J. Miller ◽  
Maron Calderwood Mays ◽  
L. Tilmant ◽  
P. A. Indelicato ◽  
M. S. Bloomberg
Keyword(s):  
Patellar Ligament ◽  
Carbon Fibres ◽  
Coated Carbon

scholarly journals Use of the modified Insall Salvati method for determination of vertical patellar position in dogs with and without cranial cruciate ligament rupture considering the morphology of the cranio-proximal tibia

2012 ◽  
Vol 81 (4) ◽  
pp. 403-407 ◽  
Author(s):  
Dávid Kňazovický ◽  
Valent Ledecký ◽  
Marián Hluchý ◽  
Marek Ďurej
Keyword(s):  
Cruciate Ligament ◽  
Patellar Ligament ◽  
Insertion Point ◽  
Cranial Cruciate Ligament ◽  
Ligament Rupture ◽  
Cruciate Ligament Rupture ◽  
Significant Difference ◽  
Healthy Dogs ◽  
Cranial Cruciate Ligament Rupture

The aim of this study was to evaluate if the modified Insall Salvati (IS) method can be applied for the canine patient despite differences of proximal tibial morphology, and if such potential differences are also seen in dogs with cranial cruciate ligament rupture. Insall Salvati method is a simple and convenient method for determination of the vertical position of patella, by dividing the length of patella by length of the patellar ligament. The influence of the variable proximal tibial morphology on the modified (IS) index was measured and the value of modified IS index in healthy dogs (n = 25) was compared with dogs with cranial cruciate ligament rupture (n = 26). Medio-lateral radiographs of 102 stifles were evaluated. Patellar ligament length (PLL), patellar length (PL), modified IS ratio and the height of insertion point of patellar ligament on tibial tuberosity were measured. Data of the IS ratio were compared with the value of the height of the insertion point with no significant difference (P = 0.36). There was no significant difference (P = 0.07) in the PLL:PL ratio between dogs affected or unaffected with cranial cruciate ligament rupture. Based on the results of this study we can conclude that the morphology of the cranio-proximal tibia and the height of insertion point of the patellar ligament do not have an influence on the value of the modified IS index both in healthy dogs and in dogs with cranial cruciate ligament rupture.

Late Reconstruction of Patellar Ligament Ruptures Using Ilizarov External Fixation

1996 ◽  
Vol 322 ◽  
pp. 174-178 ◽  
Author(s):  
Z. U. Isiklar ◽  
K. E. Varner ◽  
R. W. Lindsey ◽  
J. R. Bocell ◽  
D. M. Lintner
Keyword(s):  
External Fixation ◽  
Patellar Ligament

Tibial Tuberosity Transposition Fixation with a Locking Plate during Medial Patellar Luxation Surgery: An Ex Vivo Mechanical Study

2021 ◽  
Author(s):  
Esa V. Eskelinen ◽  
Ari P. Suhonen ◽  
Juha V. Virolainen ◽  
William D. Liska
Keyword(s):  
Phase I ◽  
Phase Ii ◽  
Locking Plate ◽  
Ex Vivo ◽  
Tibial Tuberosity ◽  
Tension Band ◽  
Patellar Ligament ◽  
Raccoon Dog ◽  
Tension Band Wire ◽  
Lower Load

Abstract Objectives The purpose of this study was to compare the load at failure, stiffness and mode of failure between three types of tibial tuberosity transposition fixation techniques: (a) pin and figure-8 tension band wire (Pin-TBW), (b) locking plate with pin and a tension band wire (Plate-Pin-TBW) and (c) locking plate with a pin (Plate-Pin). Methods Six pairs of raccoon dog cadaveric tibiae were tested in Phase I Pin-TBW versus Plate-Pin-TBW and seven pairs in Phase II Plate-Pin-TBW versus Plate-Pin. One limb of each pair was randomly assigned to one of two groups for each phase. A tensile force was applied to the patellar ligament until construct failure. Results Pin-TBW (342N ± 54.7N) failed at a lower load than Plate-Pin-TBW (469N ± 77.3N), p = 0.00748, with all Pin-TBW failing by fracture and the majority of Plate-Pin-TBW failing by rupture of patellar ligament. Pin-TBW group Phase I, normalized with Plate-Pin-TBW Phase I, failed at a lower load than Plate-Pin group Phase II, normalized with Plate-Pin-TBW Phase II, p = 0.00467. There was no significant difference in mean load at failure, stiffness or mode at failure between the groups in the Phase II study. Clinical Significance Although ex vivo mechanical testing does not replicate the postoperative live dog or cat, these results demonstrate lower construct strength of the Pin-TBW construct compared with the Plate-Pin construct in the raccoon dog cadaver model.

scholarly journals Avulsion fracture of the posterior cruciate ligament in an uncommon location associated with distal injury to the patellar ligament

2015 ◽  
Vol 50 (6) ◽  
pp. 743-746
Author(s):  
Rodrigo Pires e Albuquerque ◽  
Idemar Monteiro da Palma ◽  
Hugo Cobra ◽  
Alan de Paula Mozella ◽  
Victor Vaques
Keyword(s):  
Posterior Cruciate Ligament ◽  
Avulsion Fracture ◽  
Cruciate Ligament ◽  
Patellar Ligament ◽  
Uncommon Location
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