| http://www.w3.org/ns/prov#value | - In addition, in order to perform minimally invasive surgery, reamers have been designed for the acetabulum which, rather than having the standard hemispherical shape, have only a part hemispherical shape but must be rotated through an angle such as 180??? to form the hemispherical surface of an acetabular cavity in the pelvis designed to receive a hemispherical prosthetic acetabular component.
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