scholarly journals Loading and knee alignment have significant influence on cartilage MRI T2 in porcine knee joints

2010 ◽  
Vol 18 (7) ◽  
pp. 902-908 ◽  
Author(s):  
T. Shiomi ◽  
T. Nishii ◽  
H. Tanaka ◽  
Y. Yamazaki ◽  
K. Murase ◽  
...  
Keyword(s):  
Significant Influence ◽  
Knee Joints ◽  
Knee Alignment ◽  
Porcine Knee

scholarly journals 388 LOADING AND KNEE-ALIGNMENT HAVE SIGNIFICANT INFLUENCE ON CARTILAGE T2 IN PORCINE KNEE JOINTS

2009 ◽  
Vol 17 ◽  
pp. S204
Author(s):  
T. Shiomi ◽  
T. Nishii ◽  
Y. Yamazaki ◽  
H. Tanaka ◽  
K. Murase ◽  
...  
Keyword(s):  
Significant Influence ◽  
Knee Joints ◽  
Knee Alignment ◽  
Porcine Knee

scholarly journals The effect of a centralization procedure for extruded lateral meniscus on load distribution in porcine knee joints at different flexion angles

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Rei Kubota ◽  
Hideyuki Koga ◽  
Nobutake Ozeki ◽  
Junpei Matsuda ◽  
Yuji Kohno ◽  
...  
Keyword(s):  
Load Distribution ◽  
Lateral Meniscus ◽  
Knee Joints ◽  
Porcine Knee

scholarly journals Biomechanical analysis of a centralization procedure for extruded lateral meniscus after meniscectomy in porcine knee joints

2021 ◽  
Author(s):  
Yuji Kohno ◽  
Hideyuki Koga ◽  
Nobutake Ozeki ◽  
Junpei Matsuda ◽  
Mitsuru Mizuno ◽  
...  
Keyword(s):  
Lateral Meniscus ◽  
Biomechanical Analysis ◽  
Knee Joints ◽  
Porcine Knee

How the External Impact Energy Affects the Internal Kinetics of Knee Joint: The Comparison of Porcine and Human Knee Joint

2003 ◽  
Author(s):  
Jaw-Lin Wang ◽  
Cheng-Hsien Chung ◽  
Chung-Kai Chiang
Keyword(s):  
Knee Joint ◽  
Impact Energy ◽  
Impact Loading ◽  
Bending Moment ◽  
Knee Joints ◽  
External Energy ◽  
Human Knee ◽  
Human Knee Joint ◽  
Internal Joint ◽  
Porcine Knee

Degenerative osteoarthritis is recognized as the consequences of mechanical injuries. The abnormal impact force applied to articular cartilage would result in bone fracture or surface fissuring, and would cause the osteoarthritis [1,2]. The relation among the injury and impact energy was well studied. However, how the external energy attenuated to the internal joint is not carefully studied yet. The porcine knee joint was used as a biomechanical model for the simulation of human knee joint during impact loading. The objective of current study was to find the variation of kinetic characteristics between human and porcine knee joint during axial impact loading. Eight fresh-frozen knee joints from 10 month-old swine and seven cadaver human knee joints were used in the experiment. The mechanical responses such as forces and bending moment of knee joint, and the accelerations of femur was quantitatively analyzed. The results showed that the axial force response between human and porcine joints was similar, however, the anteroposterior shear, flexion bening moment and accelerations of these two joints were different.

scholarly journals The effect of a centralization procedure for extruded lateral meniscus on load distribution in porcine knee joints at different flexion angles

2019 ◽  
Author(s):  
Rei Kubota ◽  
Hideyuki Koga ◽  
Nobutake Ozeki ◽  
Junpei Matsuda ◽  
Yuji Kohno ◽  
...  
Keyword(s):  
Contact Pressure ◽  
Articular Surface ◽  
Lateral Meniscus ◽  
Compressive Force ◽  
Knee Joints ◽  
Meniscal Extrusion ◽  
Hoop Strain ◽  
Axial Compressive Force ◽  
Tibial Cartilage ◽  
Porcine Knee

Abstract Background: Meniscal extrusion results in loss of the ability to resist hoop strain and biomechanical overload on the joint articular surface. A centralization technique has been developed to overcome these problems. In this study, we analyzed the biomechanics of the extruded and centralized lateral meniscus (LM) in porcine knee joints at different flexion angles. Methods: Porcine knee joints (n=8) were set in the universal tester and each knee was tested under the following states: 1) intact; 2) extrusion—meniscal extrusion was created by resecting the posterior root of the LM and posterior synovial capsule; and 3) centralization—centralization was performed by two anchors inserted in the lateral tibial plateau. Deviation distance of the meniscus, contact pressure, and contact area in the anterior LM, middle LM, posterior LM, and the contact pressure of the tibial cartilage were evaluated with an axial compressive force of 200 N at knee flexion angles of 30°, 45°, 60°, and 90°. Results: The deviation distance of LM significantly increased in extrusion but was restored to the intact status after centralization at all angles. Both the contact pressure and area significantly decreased in extrusion and were restored after centralization close to the intact status in the anterior and middle LM; in the posterior LM, however, decreased contact pressure and area were not restored after centralization. The contact pressure of the tibial cartilage increased significantly in extrusion but decreased close to the intact status after centralization. Conclusions: This centralization procedure could reduce extrusion of the LM and restore the load-distributing function of the anterior-middle LM. However, the procedure itself could not restore hoop function in cases where the defect lies in the posterior LM.

scholarly journals The effect of a centralization procedure for extruded lateral meniscus on load distribution in porcine knee joints at different flexion angles

2020 ◽  
Author(s):  
Rei Kubota ◽  
Hideyuki Koga ◽  
Nobutake Ozeki ◽  
Junpei Matsuda ◽  
Yuji Kohno ◽  
...  
Keyword(s):  
Contact Pressure ◽  
Articular Surface ◽  
Lateral Meniscus ◽  
Compressive Force ◽  
Knee Joints ◽  
Meniscal Extrusion ◽  
Hoop Strain ◽  
Axial Compressive Force ◽  
Tibial Cartilage ◽  
Porcine Knee

Abstract Background : Meniscal extrusion results in loss of the ability to resist hoop strain and biomechanical overload on the joint articular surface. A centralization technique has been developed to overcome these problems. In this study, we analyzed the biomechanics of the extruded and centralized lateral meniscus (LM) in porcine knee joints at different flexion angles. Methods : Porcine knee joints (n=8) were set in the universal tester and each knee was tested under the following states: 1) intact; 2) extrusion—meniscal extrusion was created by resecting the posterior root of the LM and posterior synovial capsule; and 3) centralization—centralization was performed by two anchors inserted in the lateral tibial plateau. Deviation distance of the meniscus, contact pressure, and contact area in the anterior LM, middle LM, posterior LM, and the contact pressure of the tibial cartilage were evaluated with an axial compressive force of 200 N at knee flexion angles of 30°, 45°, 60°, and 90°. Results : The deviation distance of LM significantly increased in extrusion but was restored to the intact status after centralization at all angles. Both the contact pressure and area significantly decreased in extrusion and were restored after centralization close to the intact status in the anterior and middle LM; in the posterior LM, however, decreased contact pressure and area were not restored after centralization. The contact pressure of the tibial cartilage increased significantly in extrusion but decreased close to the intact status after centralization. Conclusions : This centralization procedure could reduce extrusion of the LM and restore the load-distributing function of the anterior-middle LM. However, the procedure itself could not restore hoop function in cases where the defect lies in the posterior LM. (276 words)

Bone substitutes and implantation depths for subchondral bone repair in osteochondral defects of porcine knee joints

2014 ◽  
Vol 23 (5) ◽  
pp. 1401-1409 ◽  
Author(s):  
Tomohiko Matsuo ◽  
Keisuke Kita ◽  
Tatsuo Mae ◽  
Yasukazu Yonetani ◽  
Satoshi Miyamoto ◽  
...  
Keyword(s):  
Subchondral Bone ◽  
Bone Repair ◽  
Bone Substitutes ◽  
Knee Joints ◽  
Osteochondral Defects ◽  
Porcine Knee

scholarly journals The effect of a centralization procedure for extruded lateral meniscus on load distribution in porcine knee joints at different flexion angles

2020 ◽  
Author(s):  
Rei Kubota ◽  
Hideyuki Koga ◽  
Nobutake Ozeki ◽  
Junpei Matsuda ◽  
Yuji Kohno ◽  
...  
Keyword(s):  
Contact Pressure ◽  
Articular Surface ◽  
Lateral Meniscus ◽  
Compressive Force ◽  
Knee Joints ◽  
Meniscal Extrusion ◽  
Hoop Strain ◽  
Axial Compressive Force ◽  
Tibial Cartilage ◽  
Porcine Knee

Abstract Background: Meniscal extrusion results in loss of the ability to resist hoop strain and biomechanical overload on the joint articular surface. A centralization technique has been developed to overcome these problems. In this study, we analyzed the biomechanics of the extruded and centralized lateral meniscus (LM) in porcine knee joints at different flexion angles.Methods: Porcine knee joints (n=8) were set in the universal tester and each knee was tested under the following states: 1) intact; 2) extrusion—meniscal extrusion was created by resecting the posterior root of the LM and posterior synovial capsule; and 3) centralization—centralization was performed by two anchors inserted in the lateral tibial plateau. Deviation distance of the meniscus, contact pressure, and contact area in the anterior LM, middle LM, posterior LM, and the contact pressure of the tibial cartilage were evaluated with an axial compressive force of 200 N at knee flexion angles of 30°, 45°, 60°, and 90°.Results: The deviation distance of LM significantly increased in extrusion but was restored to the intact status after centralization at all angles. Both the contact pressure and area significantly decreased in extrusion and were restored after centralization close to the intact status in the anterior and middle LM; in the posterior LM, however, decreased contact pressure and area were not restored after centralization. The contact pressure of the tibial cartilage increased significantly in extrusion but decreased close to the intact status after centralization.Conclusions: This centralization procedure could reduce extrusion of the LM and restore the load-distributing function of the anterior-middle LM. However, the procedure itself could not restore hoop function in cases where the defect lies in the posterior LM.

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