GB/T 23101.4 - 2023 is the fourth part of the series of standards for hydroxyapatite for surgical implants, the core is the determination of the adhesive strength of coatings. The standard specifies the determination principle, specifies the operation procedures such as tensile testing method, specifies the technical parameters and accuracy requirements of the test equipment, and also regulates the selection and preparation of samples. It provides a unified and reliable measurement standard for the production and testing of hydroxyapatite-coated surgical implants in the medical industry, which helps to ensure the coating mass of implants and improve the safety and Stability of implants in human applications.