Contact stresses in the knee joint in deep flexion

Thambyah, Ashvin; Goh, James Cho Hong; De, Soumen Das

doi:10.1016/j.medengphy.2004.09.002

Cited by 114 publications

(86 citation statements)

References 38 publications

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“…Repetitive high loads and associated microtrauma may simply accelerate the meniscal degradation and eventually exceed the threshold for tearing. The location of the tears was typically in the posterior horn of the medial meniscus, in line with peak pressures in deep knee flexion and restricted medial meniscal movements 10,11 . Interestingly, in previous parallel observations, prolonged squatting is a strong risk factor for knee OA in elderly Chinese subjects 12 , and occupational squatting/kneeling and heavy lifting are associated with joint cartilage defects in male US Veterans Administration patients 13 .…”

mentioning

confidence: 73%

Meniscal Tear — A Common Finding with Often Troublesome Consequences: Figure 1

Englund¹

2009

J Rheumatol

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mentioning

confidence: 73%

Meniscal Tear — A Common Finding with Often Troublesome Consequences: Figure 1

Englund¹

2009

J Rheumatol

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“…The results show that for the aligned case, maximum stress magnitude at 700N load is under the damage cyclic range (5-10 MPa) indicated by Thambyah et al [4], it means that the cartilage makes its normal function, that is to transmit and damp the load at normal conditions. However, results show that different factors such as overweight (load>700 N) and misalignment, could damage the articular cartilage increasing the stress magnitude and the damage magnitude implicitly, and if this magnitude is into the damage cyclic range, it could produce the erosion of articular cartilage progressively.…”

Section: Discussionmentioning

confidence: 68%

“…They showed maximum stress values of 0.125 MPa considering the cartilage like an isotropic material and values of 0.225 MPa considering the cartilage as a transversally isotropic material. Their results were obtained applying a load of 75 N. Also, Thambyah et al [4] reported a set of in vitro results of different investigations using a pressure sensor introduced in the tibio-femoral contact area. Among these results we can find those reported by McKellop et al [5], Riegger-Krugh et al [6] and Ihn et al [7].…”

Section: State Of the Artmentioning

confidence: 99%

“…Ihn et al [7] applied a load of 1960 N and reported stress values of 3.86 and 2.52 MPa in the lateral and medial side, respectively. Thambyah et al [4] using a thin film electronic sensor in real time, reported a pressure of 14 MPa in the medial and 0-11 MPa in the lateral side, they applied up to 2400 N. Also, they reported that with a cyclic stress as low as 5-10 MPa cartilage damage could appear and consequently, it is important to determine the effect of different factors such as misalignment, overweight, age, etc, that could increase the stress and the damage magnitude and produce articular cartilage erosion.…”

Section: State Of the Artmentioning

confidence: 99%

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Analysis, simulation and prediction of contact stresses in articular cartilage of the knee joint

Vidal¹,

Lesso²,

Rodríguez³

et al. 2007

Modelling in Medicine and Biology VII

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Articular cartilage (AC) has an essential function in the best performance of the human body's joints, but it has a limited capacity of regeneration and the initial cause that develops the pathological degenerative process is still unknown. It is believed that cartilage damage due to knee osteoarthritis is mechanically induced. Thus, to investigate such a phenomenon and analyze and simulate the biomechanical behavior of the knee joint, a virtual 3D knee prototype was created using a commercial finite element code, which includes the femur, tibia and AC as a deformable solid model. This paper shows the stress distribution found in AC in the femur and the tibia. The factors were obtained by applying a load range of 700 to 2800 N, 0º in flexion and different cases with physiological valgus variation and a graphical model of stress prediction to the femur cartilage was created using the stress behavior with the different factors. In general, the results show that different factors like being overweight (load> 700N) and misalignment (valgus variation) could damage the AC because they increase the stress magnitude and it comes into the cyclic damage range (5-10 MPa), which progressively produces articular cartilage damage and enhances the osteoarthritis phenomenon due to mechanical factors.

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“…Knee joint force is thus low for BD because of the small knee extension moment. With regard to knee joint force while moving, different values have been reported for walking, deep knee flexion and kneeling [19][20][21] . The same applies to knee joint force during stair ascending and descending, and this was due to differences in riser height, subject body type and gender, marker placement and interpolation methods, and joint force extraction methods 22) .…”

Section: Discussionmentioning

confidence: 99%

Study on the Effects of Different Stair-Descending Methods on Knee Angle, Joint Moment and Joint Force

2010

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Abstract. [Purpose] In general, people with bilateral osteoarthritis descend stairs sideways or backwards as compensatory movements. However, to the best of our knowledge, no studies have investigated these movements. The objective of the present study was to ascertain the effects of descending forwards and descending backwards on kinetic changes in the knee joint, to ascertain the optimal stair descending method for minimizing stress on the knee joint.[Subjects] Subjects were 30 adult women with no orthopedic or neurological disorders.[Methods] With step heights (riser heights) of 10, 15, 20 and 25 cm, changes in knee flexion angle, extension moment and joint force were measured when descending forwards and descending backwards using a three dimensional motion analysis system. [Results] Peak knee flexion angle, peak knee extension moment and peak knee joint forces observed in descending stairs backwards were smaller than those in the descending forwards action.[Conclusion] The present results suggest that descending stairs backwards for osteoarthritis patients is effective in protecting the knees, alleviating pain and acquiring compensatory movements.

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Contact stresses in the knee joint in deep flexion

Cited by 114 publications

References 38 publications

Meniscal Tear — A Common Finding with Often Troublesome Consequences: Figure 1

Meniscal Tear — A Common Finding with Often Troublesome Consequences: Figure 1

Analysis, simulation and prediction of contact stresses in articular cartilage of the knee joint

Study on the Effects of Different Stair-Descending Methods on Knee Angle, Joint Moment and Joint Force

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