{"id":10590,"date":"2025-11-13T09:51:05","date_gmt":"2025-11-13T08:51:05","guid":{"rendered":"https:\/\/endolab.org\/?post_type=spinal-implants&#038;p=10590"},"modified":"2025-11-13T12:31:14","modified_gmt":"2025-11-13T11:31:14","slug":"astm-f3574","status":"publish","type":"spinal-implants","link":"https:\/\/endolab.org\/de\/spinal-implants\/astm-f3574\/","title":{"rendered":"ASTM F3574"},"content":{"rendered":"<p><strong>ASTM F3574:<\/strong> Standard Test Methods for Sacroiliac Joint Fusion Devices<\/p>\n\n\n\n<p>ASTM F3574-22 provides standard test methods for the mechanical evaluation of Sacroiliac Joint (SIJ) fusion device assemblies. This standard is crucial for establishing a consistent basis for mechanical comparison among nonbiologic SIJ fusion devices, whether they are intended for implantation <strong>in-line with the joint space (in-line implants)<\/strong> or <strong>across the joint space (transverse implants)<\/strong>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">In-Line SIJ Fusion Implants (Annex A1)<\/h4>\n\n\n\n<p><strong>Test Configurations:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Static and Dynamic Shear Testing: Applies a purely shear force (F) to the geometric center of the device.<\/li>\n\n\n\n<li>Static and Dynamic Torsion Testing: Applies a moment (Mz\u200b) about the Z-axis (normal to the joint space) through the geometric center. A compressive preload is required for the torsion test.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Measurements:<\/strong> Guidelines are provided for calculating yield force\/moment, ultimate force\/moment, stiffness, and permanent deformation<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Test Setup:<\/strong> The implant is held within device-matched test blocks or a potting medium with a defined 4 mm intra-joint space gap to simulate the motion segment.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Transverse SIJ Fusion Implants (Annex A2)<\/h4>\n\n\n\n<p><strong>Test Configurations:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Static and Dynamic Cantilever Bending: Measures bending strength (yield moment, ultimate moment) and dynamic runout moment (fatigue) by applying a force to the proximal end of the implant<\/li>\n\n\n\n<li>Axial Pullout Test<strong>:<\/strong> Measures the axial pullout strength (maximum tensile force) required to remove the implant from a Grade 20&nbsp;lb\/ft\u00b3 polyurethane foam test block.<\/li>\n\n\n\n<li>Static Torsion Test: Measures torsional yield strength and maximum torque by applying a torsional force in the insertion direction to the specimen.<\/li>\n\n\n\n<li>Driving Torque Test: Measures the peak insertion torque recorded during the initial four revolutions when inserting a threaded implant into a polyurethane foam block.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Measurements:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bending Tests measure the bending stiffness (S), the calculated bending structural stiffness (EI<sub>e<\/sub>\u200b), the bending yield moment, and the bending ultimate moment. Dynamic bending tests determine the bending fatigue runout moment.<\/li>\n\n\n\n<li>Pullout Tests determine the axial pullout strength, which is the maximum tensile load the implant can resist before failing or disengaging from the test block.<\/li>\n\n\n\n<li>Static Torsion Tests measure the torsional yield strength and the maximum torque (torsional peak load) the implant can sustain before failure.<\/li>\n\n\n\n<li>Driving Torque Tests measure the peak insertion torque required to insert the threaded implant into the test block.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Test Setup:<\/strong> <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cantilever Bending: The implant is rigidly fixed at its distal tip to an anchoring fixture, leaving an exposed length (L) of no less than 20&nbsp;mm to serve as the moment arm. The bending force is applied to the proximal end.<\/li>\n\n\n\n<li>The setups for Pull-out, torsion and driving torque are similar to <a href=\"https:\/\/endolab.org\/de\/osteosynthesis\/astm-f543\/\" data-type=\"osteosynthesis\" data-id=\"3324\">ASTM&nbsp;F543<\/a><\/li>\n<\/ul>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":true,"_uag_custom_page_level_css":""},"class_list":["post-10590","spinal-implants","type-spinal-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":"ASTM F3574: Standard Test Methods for Sacroiliac Joint Fusion Devices ASTM F3574-22 provides standard test methods for the mechanical evaluation of Sacroiliac Joint (SIJ) fusion device assemblies. This standard is crucial for establishing a consistent basis for mechanical comparison among nonbiologic SIJ fusion devices, whether they are intended for implantation in-line with the joint space&hellip;","_links":{"self":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/spinal-implants\/10590","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/spinal-implants"}],"about":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/types\/spinal-implants"}],"wp:attachment":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/media?parent=10590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}