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The Ilizarov apparatus is a specialized external fixator of modular construction, composed of rings (stainless steel, titanium) that are transfixed to healthy bone with Kirschner wires and pins of heavy-gauge stainless steel, and immobilised in place with additional rings and threaded rods that are attached with and through adjustable nuts. The ...
Galvanized steel was common for the first half of the 20th century, continuing as an inexpensive option to its 1960s successor material—stainless steel cables and rods. In the late 20th Century, racing yachts adopted composite fiber lines for standing rigging, with the goal of reducing weight and windage aloft. [3]
Lingual braces are a cosmetic alternative in which custom-made braces are bonded to the back of the teeth making them externally invisible. Titanium braces resemble stainless-steel braces but are lighter and just as strong. People with allergies to nickel in steel often choose titanium braces, but they are more expensive than stainless steel ...
His design consisted of a stainless steel, one-piece femoral stem and head, and a polyethylene acetabular component, both of which were fixed to the bone using PMMA (acrylic) bone cement. For over two decades, the Charnley low-friction arthroplasty and its derivative designs were the most-used systems in the world.
After stress relief treatment, the braces (rust-colored, structural beams), which are used to maintain the desired shape during welding, were removed. The spacing between the two "arms" remained the same; no change was detectable (measured to 1/32" or less than 1 mm), and the spacing remained so throughout assembly, testing (to 60 ton test ...
The most commonly used are multi-strand wire bonded to all six anterior teeth or a round stainless steel wire bonded to the canines only. Although fixed retainers depend less on the patient’s cooperation for regular wearing, they are more difficult to clean and therefore need more attention from the patient to prevent plaque accumulation and ...