PubMed · 14880591
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A A BELTON, F DAVIES. 1951. Supraglenoidal pseudoarthrosis.. https://doi.org/10.1302/0301-620x.33b4.629
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Entheses are sites where tendons, ligaments, joint capsules, or fasciae attach to bone. Their function is to provide a mechanism for reducing stress at the bony interface by dissipating the biomechanical load acting on the bone. Enthesitis may occur in traumatic, endocrinologic, metabolic, degenerative, or inflammatory conditions and is a major symptom in patients with seronegative spondyloarthritis (SpA). The increasing interest in inflammation of the entheses associated with rheumatoid diseases has fundamentally changed our understanding of the clinical presentation, pathogenesis, and therapy of enthesitis. Conventional radiographs and computed tomography (CT) allow good evaluation of chronic changes of the entheses, such as soft-tissue calcification, erosions, and new bone formation. The method of first choice to evaluate acute enthesitis is magnetic resonance imaging (MRI), which depicts both soft-tissue changes and intraosseous abnormalities. The purpose of this overview is to discuss the MRI appearance of enthesitis in patients with SpA and to provide a morphologic survey of the predominantly affected entheses.
Osseointegration of implants is crucial for the long-term success of oral implants. Mineralization of the bone's extracellular matrix as the ultimate step of a mature bone formation is closely related to implant osseointegration. Osteogenesis at oral implants is a complex process, driven by cellular and acellular phenomena. The biological process of the maintenance and emergence of minerals in the vicinity of oral implants is influenced to a great extent by biophysical parameters. Implant-related structural and functional factors, as well as patient-specific factors, govern the features of osteogenesis. To understand the influence of these factors in peri-implant bone mineralization, it is important to consider the basic biological processes. Biological and crystallographic investigations have to be applied to evaluate mineralization at implant surfaces at the different hierarchical levels of analysis. This review gives insight into the complex theme of mineral formation around implants. Special focus is given to new developments in implant design and loading protocols aimed at accelerating osseointegration of dental implants.