This Technical Specification establishes a method to determine the torsional yield strength and maximum torque of the implant body/connecting part joints of endosseous dental implant systems. This test is most appropriate for evaluating new types of joints and connecting parts, as well as new materials. This Technical Specification provides a protocol for torsional loading of an implant body/connecting part joint. It is not applicable for predicting the in vivo performance of an endosseous dental implant system and it is not derived from observations of clinical failure.