Hybrid fluorescence-AFM explores articular surface degeneration in early osteoarthritis across length scales

Structural and functional changes of the articular surface in a post-traumatic model of early osteoarthritis measured by atomic force microscopy

Journal of Biomechanics ◽

10.1016/j.jbiomech.2010.08.009 ◽

2010 ◽

Vol 43 (16) ◽

pp. 3091-3098 ◽

Cited By ~ 24

Author(s):

Jane Desrochers ◽

Matthias A. Amrein ◽

John R. Matyas

Keyword(s):

Atomic Force Microscopy ◽

Articular Surface ◽

Early Osteoarthritis ◽

Functional Changes ◽

Force Microscopy ◽

Atomic Force ◽

Post Traumatic

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Evaluation of Positive Contrast Arthrography in Canine Cranial Cruciate Ligament Disease

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1632495 ◽

1996 ◽

Vol 09 (01) ◽

pp. 10-3 ◽

Cited By ~ 2

Author(s):

D.N. Aron ◽

R. Roberts ◽

J. Stallings ◽

J. Brown ◽

C.W. Hay

Keyword(s):

Articular Surface ◽

Cruciate Ligament ◽

Positive Contrast ◽

Joint Effusion ◽

Radiographic Evaluation ◽

Cranial Cruciate Ligament ◽

Joint Pathology ◽

Meniscal Pathology ◽

Cranial Cruciate Ligament Disease ◽

Better Than

SummaryArthrographic and intraoperative evaluations of stifles affected with cranial cruciate disease were compared. Arthrography did not appear to be helpful in predicting cranial cruciate ligament pathology. The caudal cruciate ligament was consistently not visualized in the arthrograms and was normal at surgery. The menisci were visualized consistently in the arthrograms, but conclusions could not be made as to the benefit of arthrography in predicting meniscal pathology. Arthrography was not helpful in predicting joint capsule and femoral articular surface pathology. Survey radiographic evaluation was better than arthrography in evaluating joint pathology. When cruciate injury is suspected, after history and physical examination, survey radiographs are better than positive contrast arthrograms at supporting the diagnosis.Positive contrast arthrography was evaluated as a diagnostic aid in canine cranial cruciate ligament disease. It did not appear to be useful in predicting joint pathology. With arthrography, both menisci could be visualized and evaluated for abnormalities. Joint effusion and presence of osteophytes evaluated on survey radiographs was better than arthrography in evaluating joint pathology.

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Radiographic Prevalence of Osteochondrosis in Yearling Feral Horses

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1632481 ◽

1999 ◽

Vol 12 (03) ◽

pp. 151-155 ◽

Cited By ~ 19

Author(s):

L. W. Valentino ◽

E. M. Gaughan ◽

D. R. Biller ◽

R. H. Raub ◽

J. D. Lillich

Keyword(s):

Subchondral Bone ◽

Management Practices ◽

Articular Surface ◽

Radiographic Images ◽

Feral Horses ◽

Metacarpophalangeal Joints ◽

Genetic Base ◽

Domestic Horses ◽

The Difference ◽

Metatarsophalangeal Joints

The purpose of the study is to document the prevalence of articular surface osteochondrosis lesions in feral horses. Eighty yearling feral horses were used. Radiographic images of the left stifle, both tarsocrural, metatarsophalangeal, metacarpophalangeal joints were taken. Radiographs were examined for the presence of osteochondral fragmentation and abnormal outline of subchondral bone suggestive of osteochondrosis. The prevalence of each lesion was calculated for each joint as well as for overall prevalence within the group, the latter being 6.25%. Typical osteochondrosis lesions were found within the tarsocrural and metatarsophalangeal joints. Based on the difference in prevalence of osteochondrosis between feral and certain domestic horses, management practices and perhaps genetic base may have a greater influence on the development of the disease in horses than trauma alone.

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MODELING THE EFFECTIVE DYNAMIC PROPERTIES OF FIBER COMPOSITES MODIFIED ACROSS LENGTH SCALES

Nanoscience and Technology An International Journal ◽

10.1615/nanoscitechnolintj.2018026537 ◽

2018 ◽

Vol 9 (2) ◽

pp. 117-138 ◽

Cited By ~ 2

Author(s):

Dmitriy B. Volkov-Bogorodsky ◽

Sergey A. Lurie ◽

G. I. Kriven

Keyword(s):

Dynamic Properties ◽

Fiber Composites ◽

Length Scales ◽

Effective Dynamic

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An Analytical Thermodynamic Approach to Friction of Rubber on Ice

Tire Science and Technology ◽

10.2346/1945-5852-40.2.124 ◽

2012 ◽

Vol 40 (2) ◽

pp. 124-150

Author(s):

Klaus Wiese ◽

Thiemo M. Kessel ◽

Reinhard Mundl ◽

Burkhard Wies

Keyword(s):

Coefficient Of Friction ◽

Liquid Layer ◽

Contact Area ◽

Leading Edge ◽

Viscous Friction ◽

Analytical Approximation ◽

Real Contact Area ◽

Length Scales ◽

Real Contact ◽

Ice Surface

ABSTRACT The presented investigation is motivated by the need for performance improvement in winter tires, based on the idea of innovative “functional” surfaces. Current tread design features focus on macroscopic length scales. The potential of microscopic surface effects for friction on wintery roads has not been considered extensively yet. We limit our considerations to length scales for which rubber is rough, in contrast to a perfectly smooth ice surface. Therefore we assume that the only source of frictional forces is the viscosity of a sheared intermediate thin liquid layer of melted ice. Rubber hysteresis and adhesion effects are considered to be negligible. The height of the liquid layer is driven by an equilibrium between the heat built up by viscous friction, energy consumption for phase transition between ice and water, and heat flow into the cold underlying ice. In addition, the microscopic “squeeze-out” phenomena of melted water resulting from rubber asperities are also taken into consideration. The size and microscopic real contact area of these asperities are derived from roughness parameters of the free rubber surface using Greenwood-Williamson contact theory and compared with the measured real contact area. The derived one-dimensional differential equation for the height of an averaged liquid layer is solved for stationary sliding by a piecewise analytical approximation. The frictional shear forces are deduced and integrated over the whole macroscopic contact area to result in a global coefficient of friction. The boundary condition at the leading edge of the contact area is prescribed by the height of a “quasi-liquid layer,” which already exists on the “free” ice surface. It turns out that this approach meets the measured coefficient of friction in the laboratory. More precisely, the calculated dependencies of the friction coefficient on ice temperature, sliding speed, and contact pressure are confirmed by measurements of a simple rubber block sample on artificial ice in the laboratory.

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