A new technique to measure the dynamic contact pressures on the Tibial Plateau

Cottrell, Jocelyn M.; Scholten, Paul; Wanich, Tony; Warren, Russell F.; Wright, Timothy M.; Maher, Suzanne A.

doi:10.1016/j.jbiomech.2008.04.024

Cited by 39 publications

(43 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The data were then analyzed to extract peak contact pressure, contact area, and mean contact pressure across each sensor at 14% and 45% of the gait cycle. The values for the last eight gait cycles for each test were averaged 43 . The sensor was then virtually divided into quadrants-anteroperipheral, anterocentral, posteroperipheral, and posterocentral.…”

Section: Discussionmentioning

confidence: 99%

“…It is a force-controlled apparatus than can be programmed to simultaneously and dynamically control the axial force, anterior force, posterior force, and rotational moment (internal/external torque) as a function of the applied flexion/extension angle profile. Previously used to explore the pressure distribution across ovine knees 43 , and demonstrated to reproduce physiological knee kinematics during gait 39 , the apparatus was further modified for the purposes of this study to accept and load human cadaver knees. Modifications included the development of a method to reproducibly align the epicondylar axis of the femur with the axis of rotation of the machine and the development of new fixtures to keep the joint rigidly fixed throughout testing.…”

Section: Discussionmentioning

confidence: 99%

“…Plastic augment tabs were fixed along the edges of the sensor to allow suture fixation. Each sensor was conditioned, equilibrated, and calibrated according to the manufacturer's instructions 43 . One-centimeter incisions were made in the meniscotibial (coronary) ligaments anteriorly and posteriorly in line with their fibers, allowing the sensor to be passed beneath the medial meniscus and flush with the tibial plateau without detaching the meniscotibial ligaments, meniscofemoral ligaments, or their capsular attachments.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Contact Mechanics of the Medial Meniscus as a Function of Radial Tear, Repair, and Partial Meniscectomy

Bedi

Kelly

Baad

et al. 2010

The Journal of Bone and Joint Surgery-American Volume

255

212

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Contact Mechanics of the Medial Meniscus as a Function of Radial Tear, Repair, and Partial Meniscectomy

Bedi

Kelly

Baad

et al. 2010

The Journal of Bone and Joint Surgery-American Volume

255

212

View full text Add to dashboard Cite

“…The use of different pressure sensors for in vitro tibiofemoral contact analyses has been previously reported for canine, 18 porcine, 28 sheep, 14,29 and human knee joints. 11,12 To place the pressure sensors under the menisci, the meniscotibial coronary ligaments had to be dissected, but this has no impact on the contact mechanics under axial compression.…”

Section: Influence Of Partial Meniscectomy On Knee Joint Biomechanicsmentioning

confidence: 99%

“…[10][11][12] These studies showed that loss of meniscal tissue leads to decreased contact area (CA) and increased contact pressure. [11][12][13][14][15] Lee et al 11 found an increase of 33% to 49% of maximum medial contact pressure (CP max ) after a 50% partial meniscectomy dependent on the flexion angle. This change was 1.5-2 times greater than the change from 50% to 75%.…”

mentioning

confidence: 99%

Effect of partial meniscectomy at the medial posterior horn on tibiofemoral contact mechanics and meniscal hoop strains in human knees

Seitz

Lubomierski

Friemert³

et al. 2011

Journal Orthopaedic Research

View full text Add to dashboard Cite

ABSTRACT:We examined the influence of partial meniscectomy of 10 mm width on 10 human cadaveric knee joints, as it is performed during the treatment of radial tears in the posterior horn of the medial meniscus, on maximum contact pressure, contact area (CA), and meniscal hoop strain in the lateral and medial knee compartments. In case of 08 and 308 flexion angle, 20% and 50% partial meniscectomy did not influence maximum contact pressure and area. Only in case of 608 knee flexion, 50% partial resection increased medial maximum contact pressure and decreased the medial CA statistically significant. However, 100% partial resection increased maximum contact pressure and decreased CA significantly in the meniscectomized medial knee compartment in all tested knee positions. No significant differences were noted for meniscal hoop strain. From a biomechanical point of view, our in vitro study suggests that the medial joint compartment is not in danger of accelerated cartilage degeneration up to a resection limit of 20% meniscal depth and 10 mm width. Contact mechanics are likely to be more sensitive to partial meniscectomy at higher flexion angles, which has to be further investigated. ß

show abstract

Determinants of alcohol use and abuse: Impact of quantity and frequency patterns on liver disease

2007

View full text Add to dashboard Cite

More than 70% of alcohol is consumed by 10% of the population in the United States. Implicit in this statistic is that tremendous variation in the pattern of drinking (quantity, frequency, and duration) exists among alcohol consumers. Individuals who are binge or chronic drinkers will have different health outcomes than social drinkers. Therefore, knowing the pattern of drinking will shed light on how severely individuals are alcohol-dependent and on the extent of liver damage. Thus, these parameters assume particular relevance for the treatment-providing physician. Genetic factors contribute substantially to differences in alcohol metabolism. Variations in the activities of the alcohol-metabolizing enzymes, cytosolic alcohol dehydrogenase and mitochondrial aldehyde dehydrogenase, in part determine blood alcohol concentration, thereby contributing to the predisposition to becoming alcohol-dependent and to susceptibility to alcohol-induced liver damage. Chronic alcohol consumption induces cytochrome P450 2E1, a microsomal enzyme that metabolizes alcohol at high concentrations and also metabolizes medications such as acetaminophen and protease inhibitors. Alcohol metabolism changes the redox state of the liver, which leads to alterations in hepatic lipid, carbohydrate, protein, lactate, and uric acid metabolism. The quantity and frequency of alcohol consumption severely impact the liver in the presence of comorbid conditions such as infection with hepatitis B or C and/or human immunodeficiency virus, type 2 diabetes, hemochromatosis, or obesity and thus have implications with respect to the extent of injury and response to medications. Conclusion: Knowledge of the relationships between the quantity, frequency, and patterns of drinking and alcoholic liver disease is limited. A better understanding of these relationships will guide hepatologists in managing alcoholic liver disease.

show abstract

A new technique to measure the dynamic contact pressures on the Tibial Plateau

Cited by 39 publications

References 24 publications

Dynamic Contact Mechanics of the Medial Meniscus as a Function of Radial Tear, Repair, and Partial Meniscectomy

Dynamic Contact Mechanics of the Medial Meniscus as a Function of Radial Tear, Repair, and Partial Meniscectomy

Effect of partial meniscectomy at the medial posterior horn on tibiofemoral contact mechanics and meniscal hoop strains in human knees

Determinants of alcohol use and abuse: Impact of quantity and frequency patterns on liver disease

Contact Info

Product

Resources

About