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Until the mid-1990s, the state-preferred IUD was a stainless steel ring, [90] [91] which had a higher rate of complications compared to other types of IUD. It gave rise to the idiom shànghuán ( 上环 ), meaning "insert a loop".
The small, flexible inserts are made from polyester fibers, nickel-titanium, stainless steel and solder. The insert contains inner polyethylene terephthalate fibers to induce inflammation, causing a benign fibrotic ingrowth, [24] and is held in place by flexible stainless steel inner coil and a dynamic outer nickel titanium alloy coil. [24]
The stainless steel single-ring IUD was developed in the 1970s [63] and widely used in China because of low manufacturing costs. The Chinese government banned production of steel IUDs in 1993 due to high failure rates (up to 10% per year). [13] [64] Howard Tatum, in the US, conceived the plastic T-shaped IUD in 1968.
An intrauterine device (IUD) is a small contraceptive device, often T-shaped, which is implanted into the uterus. They can be hormonal or non-hormonal are long-acting, reversible, and the most effective types of reversible birth control. [14] As of 2011, IUDs are the most widely used form of reversible contraception worldwide. [15]
An intravasal control valve is a reversible valve implanted in the vas deferens with the ability to either inhibit or permit sperm passage depending on the position of the device. Bionyx has developed a T-shaped intravasal control valve composed of gold and stainless steel for use in humans. [5]
A hormonal intrauterine device (IUD), also known as an intrauterine system (IUS) with progestogen and sold under the brand name Mirena among others, is an intrauterine device that releases a progestogenic hormonal agent such as levonorgestrel into the uterus. [2]
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Stainless steel is used in a variety of applications in dentistry. It is common to use stainless steel in many instruments that need to be sterilized, such as needles, [42] endodontic files in root canal therapy, metal posts in root canal-treated teeth, temporary crowns and crowns for deciduous teeth, and arch wires and brackets in orthodontics ...