{"id":3008,"date":"2024-09-05T14:56:56","date_gmt":"2024-09-05T12:56:56","guid":{"rendered":"https:\/\/endolab.org\/?post_type=knee-implants&#038;p=3008"},"modified":"2025-12-03T14:02:44","modified_gmt":"2025-12-03T13:02:44","slug":"iso-14879-1-astm-f1800","status":"publish","type":"knee-implants","link":"https:\/\/endolab.org\/de\/knee-implants\/iso-14879-1-astm-f1800\/","title":{"rendered":"ISO\u00a014879-1 \/  ASTM\u00a0F1800"},"content":{"rendered":"<p><strong>ISO&nbsp;14879-1:<\/strong>&nbsp;Implants for surgery &#8211; Total knee-joint prostheses &#8211; Part 1: Determination of endurance properties of knee tibial trays<\/p>\n\n\n\n<p><strong>ASTM&nbsp;F1800:<\/strong>&nbsp;Standard Practice for Cyclic Fatigue Testing of Metal Tibial Tray Components of Total Knee Joint Replacements<\/p>\n\n\n\n<p><strong>ISO&nbsp;21536:<\/strong>&nbsp;Non-active surgical implants &#8211; Joint replacement implants &#8211; Specific requirements for knee-joint replacement implants<\/p>\n\n\n\n<p><strong>ASTM&nbsp;F2083:<\/strong>&nbsp;Standard Specification for Knee Replacement Prosthesis<\/p>\n\n\n\n<p>The tibial trays in a total knee endoprosthesis are subjected to fatigue stress. The worst-case condition occurs if medial loading is applied without bone support. To simulate this worst-case scenario, we fixate the tibial trays unilaterally using a metal block. To avoid restraint forces, EndoLab<sup>\u00ae<\/sup>&nbsp;uses a load application mechanism allowing free movement on the horizontal plane.<\/p>\n\n\n\n<p>Safety against fracture is determined up to 10 million cycles, testing five implants at 900 N maximum load (ISO requirements). Due to clinical fractures of implants that have passed fatigue testing at 900 N, EndoLab<sup>\u00ae<\/sup>&nbsp;recommends testing at a higher load level of 2,000 N. In contrast, tibial tray designs with short pegs did fail at 900 N, with no clinical evidence of fatigue failure. &nbsp;<\/p>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":true,"_uag_custom_page_level_css":""},"class_list":["post-3008","knee-implants","type-knee-implants","status-publish","hentry"],"acf":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Simon Kaddick","author_link":"https:\/\/endolab.org\/de\/author\/"},"uagb_comment_info":0,"uagb_excerpt":"ISO&nbsp;14879-1:&nbsp;Implants for surgery &#8211; Total knee-joint prostheses &#8211; Part 1: Determination of endurance properties of knee tibial trays ASTM&nbsp;F1800:&nbsp;Standard Practice for Cyclic Fatigue Testing of Metal Tibial Tray Components of Total Knee Joint Replacements ISO&nbsp;21536:&nbsp;Non-active surgical implants &#8211; Joint replacement implants &#8211; Specific requirements for knee-joint replacement implants ASTM&nbsp;F2083:&nbsp;Standard Specification for Knee Replacement Prosthesis The&hellip;","_links":{"self":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/knee-implants\/3008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/knee-implants"}],"about":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/types\/knee-implants"}],"wp:attachment":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/media?parent=3008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}