| http://www.w3.org/ns/prov#value | - Furthermore, because the guide rails 108 are preferably made from a non-metallic material (e.g., the entire implant device body 102 being made from a polymeric material such as Polyetheretherketone (PEEK)), a bone engagement portion (e.g., upper edge portion) of the guide rails 108 will not be as sharp as a bone engagement portion of a metal device intended to similarly provide immediate fixation
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