H
Heikki J. Helminen
Researcher at University of Eastern Finland
Publications - 154
Citations - 9647
Heikki J. Helminen is an academic researcher from University of Eastern Finland. The author has contributed to research in topics: Cartilage & Collagen network. The author has an hindex of 54, co-authored 154 publications receiving 9236 citations. Previous affiliations of Heikki J. Helminen include Okayama University.
Papers
More filters
Journal ArticleDOI
Comparison of the equilibrium response of articular cartilage in unconfined compression, confined compression and indentation
Rami K. Korhonen,Mikko S. Laasanen,Juha Töyräs,Jarno Rieppo,Jani Hirvonen,Heikki J. Helminen,Jukka S. Jurvelin +6 more
TL;DR: Values of the elastic parameters of the cartilage are dependent on the measurement technique in use and may depend on the indenter size in use, as well as the equilibrium response of articular cartilage under unconfined and confined compression.
Journal ArticleDOI
Normal and pathological adaptations of articular cartilage to joint loading.
TL;DR: The prevailing view is that osteoarthrosis starts from the cartilage surface through PG depletion and fibrillation of the superficial collagen network, and it has been suggested that the initial structural changes take place in the subchondral bone, especially when the joint is exposed to an impact type of loading.
Journal ArticleDOI
Moderate running exercise augments glycosaminoglycans and thickness of articular cartilage in the knee joint of young beagle dogs.
TL;DR: It is considered that moderate running exercise locally alters the biological properties of young articular cartilage at regions bearing the highest loading surplus.
Journal Article
Hip muscle strength and muscle cross sectional area in men with and without hip osteoarthritis.
Merja H. Arokoski,Jari Arokoski,Mikko Haara,Markku Kankaanpää,Minna Vesterinen,Lea Niemitukia,Heikki J. Helminen +6 more
TL;DR: Men with hip OA have significantly lower abduction, adduction, and flexion muscle strength than controls, and the decrease of muscle size and hip pain may contribute to the decreases of muscle strength in Hip OA.
Journal ArticleDOI
Fibril reinforced poroelastic model predicts specifically mechanical behavior of normal, proteoglycan depleted and collagen degraded articular cartilage.
Rami K. Korhonen,Mikko S. Laasanen,Juha Töyräs,Reijo Lappalainen,Heikki J. Helminen,Jukka S. Jurvelin +5 more
TL;DR: It is concluded that the compression-tension nonlinearity of the tissue is needed to capture realistically the mechanical behavior of normal and degenerated articular cartilage in unconfined compression.