Publications by authors named "C R Henak"
Articular cartilage fatigue causes frequency-dependent softening and crack extension.
J Mech Behav Biomed Mater
December 2024
Article Synopsis
- Soft biological polymers like articular cartilage are highly resistant to fractures and fatigue, making them key models for new material development, yet we need to better understand their behavior under stress.
- The study examined cartilage's mechanical properties under different frequencies and cycles of cyclic compression, measuring thickness, stiffness, and crack growth.
- Results showed that repetitive loading led to irreversible damage and changes in material behavior, with higher frequencies resulting in less deterioration, which can enhance our knowledge of cartilage failure and aid osteoarthritis treatment.
Comparison of radiography and computed tomography for identification of third metacarpal structural change and associated assessment of condylar stress fracture risk in Thoroughbred racehorses.
Equine Vet J
August 2024
Article Synopsis
- - The study investigates how effective digital radiographs (DR) and standing computed tomography (sCT) are in assessing the risk of condylar stress fractures in Thoroughbred racehorses, which can lead to catastrophic injuries.
- - Four observers analyzed images of 31 horses, focusing on bone structure changes, and found that while both imaging methods had high specificity, the sensitivity for detecting structural changes was relatively low.
- - Results indicated that sCT provided better repeatability and reliability for risk assessments compared to DR, particularly for identifying horses at high risk of injury.
Article Synopsis
- Condylar stress fractures in the distal end of third metacarpal/metatarsal bones are a leading cause of injury and euthanasia in racehorses.
- This study aimed to investigate whether focal subchondral bone injuries influence strain in the condyles using advanced imaging techniques and mechanical testing.
- Results showed that bones with subchondral bone injury had significantly higher strain rates in the parasagittal groove, indicating a link between structural changes and increased risk of stress fractures.
Articular cartilage is found at the distal end of long bones and is responsible for assisting in joint articulation. While articular cartilage has remarkable resistance to failure, once initially damaged, degeneration is nearly irreversible. Thus, understanding damage initiation is important.
View Article and Find Full Text PDFVitamin D and minerals, including zinc (Zn) and manganese (Mn), are vital in the development of bones, but their roles in the development of articular cartilage material behavior are not well understood. In this study, articular cartilage material properties from a hypovitaminosis D porcine model were evaluated. Pigs were produced by sows fed vitamin D deficient diets during gestation and lactation, and the offspring were subsequently fed vitamin D deficient diets for 3 weeks during the nursery period.
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