The Prosthesis reference article from the English Wikipedia on 24-Jul-2004
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Prosthesis

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In medicine, a prosthesis is an artificial extension that replaces a missing part of the body. Contrast with orthosis that supplements the body. Prostheses are typically used to replace parts lost by injury (traumatic) or missing from birth (congenital), supplement defective parts, allow transsexual men to change their outward physical sex, and achieve secondary sex characteristics for transsexual women, and in movie special effects.

Some types of prosthetics include:

See also: orthosis