{"id":2337,"date":"2024-08-26T16:52:27","date_gmt":"2024-08-26T14:52:27","guid":{"rendered":"https:\/\/endolab.org\/?post_type=dental-implants&#038;p=2337"},"modified":"2026-08-19T09:13:38","modified_gmt":"2026-08-19T07:13:38","slug":"iso-ts-13498","status":"publish","type":"dental-implants","link":"https:\/\/endolab.org\/de\/dental-implants\/iso-ts-13498\/","title":{"rendered":"ISO\/TS\u00a013498"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>ISO\/TS 13498:<\/strong> Dentistry &#8211; Torsion test of implant body\/connecting part joints of endosseous dental implant systems<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This specification describes a method to determine the torsional yield strength and maximum torque of the implant body\/connecting part joints of endosseous dental implant systems. A minimum of six implants is required. The standard does not define acceptance criteria.<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>EXECUTIVE SUMMARY<\/strong><br>Testing according to ISO\/TS 13498 evaluates how an implant body\/connecting part joint behaves when subjected to increasing torsional loading.<br>The main test results are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>torsional yield strength<\/li>\n\n\n\n<li>maximum torque<\/li>\n\n\n\n<li>observation of deformation or fracture at the connection<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">At least six specimens are tested. Torque is applied continuously while the rotational movement of the connection is recorded, producing a torque versus rotation angle curve from which the mechanical characteristics are determined.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Read more&#8230;<\/summary>\n<p class=\"wp-block-paragraph\"><strong>Purpose of the test<\/strong><br>Dental implant systems commonly use anti-rotational features to provide a stable connection between the implant body and prosthetic components. This connection must be sufficiently resistant to torsional loading because masticatory forces can include a significant rotational component.<br>If the connection does not provide sufficient torsional resistance, deformation or fracture of the connected components can occur. ISO\/TS 13498 therefore provides a standardized method for comparing the torsional strength of different implant connections, designs or materials.<br>The test is a comparative laboratory method and is not intended to predict the in vivo performance of the dental implant system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Finished device testing<\/strong><br>Testing is performed using finished devices or specimens with a connecting joint equivalent to that of the finished product. The components should therefore represent the same manufacturing condition as the device intended for marketing.<br>If the implant is intended to be sterilized by the clinician before surgery, the specimens are sterilized according to the manufacturer&#8217;s instructions before testing. Sterilization may be omitted if there is evidence that the specified process has no significant influence on the relevant material properties.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Specimen preparation<\/strong><br>The connecting part is assembled to the implant body using the specified connecting screw. The screw is tightened according to the manufacturer&#8217;s instructions for use.<br>The implant body and connecting part are then rigidly held in the test system so that torque can be introduced into the connection in a controlled manner. Correct alignment of the components and test system is important to ensure that the measured response represents torsional loading of the implant connection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Test procedure<\/strong><br>The assembled specimen is clamped in a torsional testing device and torque is continuously applied to the connecting part.<br>During loading, both torque and rotational displacement are recorded. This produces a torque versus rotation angle curve that describes the mechanical response of the implant connection.<br>The test is continued until the relevant maximum torque has been reached. At least six specimens are evaluated under the same test conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Torsional yield strength<\/strong><br>The torsional yield strength represents the point at which the connection begins to deviate significantly from its initial torsional behaviour.<br>ISO\/TS 13498 determines this value from the torque versus rotation angle curve using a 2\u00b0 offset method. The resulting torsional yield strength therefore provides a defined measure of the torque at which permanent rotational deformation of the connection begins to become relevant.<br>This value is particularly useful when comparing different connection geometries or materials because it describes the onset of non-linear mechanical behaviour rather than only the ultimate strength of the joint.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Maximum torque<\/strong><br>The maximum torque is the highest torque recorded during the test.<br>It represents the maximum torsional load reached by the implant body\/connecting part joint during the test and is determined directly from the recorded torque versus rotation angle curve.<br>Together with the torsional yield strength, the maximum torque provides a more complete description of the mechanical behaviour of the connection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Failure assessment<\/strong><br>After testing, the implant body\/connecting part joint is examined under low magnification.<br>Any deformation or fracture of the tested components is documented. This additional assessment helps identify where and how the connection reached its mechanical limit and complements the numerical torque results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Evaluation<\/strong><br>The torsional yield strength and maximum torque are determined for each specimen, and the mean values of the tested specimens are calculated.<br>The results can be used to compare different implant connection designs, connecting parts or materials under standardized laboratory conditions.<br>ISO\/TS 13498 does not specify universal acceptance criteria. The measured values therefore need to be assessed in relation to the implant design and the manufacturer&#8217;s defined requirements.<\/p>\n<\/details>","protected":false},"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":true,"_uag_custom_page_level_css":""},"dental-implant-taxonomy":[],"class_list":["post-2337","dental-implants","type-dental-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":"Theresa Kaddick","author_link":"https:\/\/endolab.org\/de\/author\/"},"uagb_comment_info":0,"uagb_excerpt":"ISO\/TS 13498: Dentistry &#8211; Torsion test of implant body\/connecting part joints of endosseous dental implant systems This specification describes a method to determine the torsional yield strength and maximum torque of the implant body\/connecting part joints of endosseous dental implant systems. A minimum of six implants is required. The standard does not define acceptance criteria.&hellip;","_links":{"self":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/dental-implants\/2337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/dental-implants"}],"about":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/types\/dental-implants"}],"wp:attachment":[{"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/media?parent=2337"}],"wp:term":[{"taxonomy":"dental-implant-taxonomy","embeddable":true,"href":"https:\/\/endolab.org\/de\/wp-json\/wp\/v2\/dental-implant-taxonomy?post=2337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}