Page 1
Page 1
Molecular Parameters Indicating Adaptation to Mechanical Stress in Fibrous Connective Tissue
The present study pursues the hypothesis that local compressive force and the occurrence of cartilage-specific transformation processes within tendons and ligaments are directly correlated. In selected anatomical samples of human origin the distribution pattern of certain components of the extracellular matrix is assessed. Investigations are carried out at the extensor tendons of toes and fingers, at the transverse ligament of the atlas, at the transverse ligament of the acetabulum, and at the tendon of the superior oblique muscle and its trochlea. The molecular components of the extracellular matrix are detected with standardized immunohistochemical methods. The results show that certain molecules only occur due to compressive stress, others due to tensile stress. The molecular spectrum of the extracellular matrix allows qualifying conclusions to the mechanical situation of a given part of the tissue. The spatial expansion of the fibrocartilaginous adaptation zones in tendons and ligaments roughly corresponds with the zones subjected to compressive force; tensile stress alone does not result in a production of fibrocartilage.
Heart block
Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscle tissue, with the other two being skeletal muscle and smooth muscle. It is involuntary, striated muscle that constitutes the main tissue of the wall of the heart. The cardiac muscle (myocardium) forms a thick middle layer between the outer layer of the heart wall (the pericardium) and the inner layer (the endocardium), with blood supplied via the coronary circulation. It is composed of individual cardiac muscle cells joined together by intercalated discs, and encased by collagen fibers and other substances that form the extracellular matrix.
Facial wirkles and treating strategies
Skin is a complex organ covering the entire surface of the body. Skin aging is characterized by features such as wrinkling, loss of elasticity, laxity, and rough- textured appearance. This aging process is accompanied with phenotypic changes in cutaneous cells as well as structural and functional changes in extracellular matrix components such as collagens and elastin. These changes occur under the influence of intrinsic and extrinsic factors, Skin changes associated with aging are the focus of many surgical and nonsurgical procedures aimed to improve the appearance of skin...
Esthetic & restorative dentistry : Material selection & technique
Provides the most up-to-date information on enhanced developments, materials, and techniques that have emerged since the publication of the second edition, offering the reader a completely updated, revised, and newly illustrated overview of modern esthetic and restorative dentistry complete with tutorial videos. New topics include web-based communication with the laboratory, indirect composite chairside CAD/CAM restorations, a comparison of digital and conventional techniques, the resin composite injection technique, as well as updated information on composites and ceramic systems, including esthetic zirconia. New cases illustrate the maintenance of esthetic restorative materials, esthetic contouring, immediate dentin sealing, and novel surgical techniques such as lip repositioning, connective tissue grafting, and ridge preservation with collagen membranes.
Diverse Roles of Integrin Receptors in Articular Cartilage
Recent studies from the authors' laboratory and from other leading groups have shown that ß1-integrins are essential for cell signalling and communication in chondrocytes. Furthermore, ß1-integrins function as mechanoreceptors in the chondrocyte mechanotransduction pathway. Their expression is therefore essential for maintaining the chondrocyte phenotype, preventing chondrocyte apoptosis and regulating chondrocyte-specific gene expression. This book volume summarizes the work that the authors have done on ß1-integrins over the last 18 years and focuses on the expression and regulation of these proteins in chondrocytes and their role in the context of the unique function of chondrocytes within articular cartilage.
Collagen: Structure and Mechanics
Collagen: Structure and Mechanics provides a cohesive introduction to collagen-rich tissues, such as tendon, bone, cornea or arterials walls. Written in a clear and didactic manner, this volume reviews current knowledge on hierarchical structure, mechanical properties, deformation and strengthening mechanisms, and discusses many applications in biomaterials and tissue engineering.
Collagen : Primer in Structure, Processing and Assembly
This volume of Topics in Current Chemistry is an attempt to update and compile the biochemical, molecular knowledge of the still growing family of collagenous proteins. Its intention is to provide a comprehensive summary of all mechanisms known to be involved in synthesis, processing and deposition of collagen molecules, all of which are apparently shared by any known collagen type as part of a common biosynthetic route. From the intracellular initiation of protein translation to the extracellular deposition of mature molecules into the scaffold of the preformed tissue texture, collagen biosynthesis exhibits a profile of mechanisms absolutely unique when compared to other proteins
