微信公众号随时随地查标准

QQ交流1群(已满)

QQ群标准在线咨询2

QQ交流2群

购买标准后,可去我的标准下载或阅读

定价: 605元 / 折扣价: 515 加购物车

在线阅读 收 藏

定价: 481元 / 折扣价: 409 加购物车

在线阅读 收 藏

定价: 345元 / 折扣价: 294

在线阅读 收 藏

定价: 605元 / 折扣价: 515 加购物车

在线阅读 收 藏

5.1 Spinal implants are generally composed of several components that, when connected together, form a spinal implant construct. Spinal implant constructs are designed to provide some stability to the spine while arthrodesis takes place. This test method outlines standardized evaluations of different interconnection mechanisms to facilitate comparison between different designs. Comparisons must be made cautiously and with careful analysis, taking into account the effects that design differences can have on the loading configurations.5.2 This test method is used to quantify the static and fatigue properties of different implant interconnection designs. The mechanical tests are conducted in vitro using simplified, unidirectional loads and moments. Fatigue testing in a simulated body fluid or saline may have a fretting, corrosive, or lubricating effect on the interconnection and thereby affect the relative performance of tested devices. Hence, the test environment, whether a simulated body fluid, saline (9 g NaCl per 1000 mL H2O), with a saline drip, or dry, is an important characteristic of the test and must be reported accurately.5.3 The loading of spinal implant constructs in vivo will, in general, differ from the loading configurations used in this test method. The results obtained here cannot be used directly to predict in vivo performance. However, the results can be used to compare different component designs in terms of relative mechanical parameters.1.1 This test method covers the measurement of uniaxial static and fatigue strength, and resistance to loosening of the component interconnection mechanisms of spinal arthrodesis implants.1.2 The purpose of this test method is to provide a means of mechanically characterizing different designs of spinal implant interconnections. Ultimately, the various components and interconnections should be combined for static and fatigue testing of the spinal implant construct. It is not the intention of this test method to address the analysis of spinal implant constructs or subconstructs or to define levels of performance of spinal implants, as insufficient knowledge is available to predict the consequences of the use of particular spinal implant designs.1.3 This standard defines test methods to measure the strength of spinal implant component interconnections and how to report test results.1.4 The values stated in SI units are to be regarded as standard, with the exception of angular measurements, which may be reported in terms of either degrees or radians.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价: 646元 / 折扣价: 550 加购物车

在线阅读 收 藏

Information technology - Open Systems Interconnection - Systems Management: Usage metering function for accounting purposes AMENDMENT 1: Implementation conformance statement proformas

定价: 1320元 / 折扣价: 1122

在线阅读 收 藏

Information technology - Open Systems Interconnection - Systems Management: Metric objects and attributes AMENDMENT 1: Implementation conformance statement proformas

定价: 1411元 / 折扣价: 1200

在线阅读 收 藏

1 Scope This Recommendation | International Standard defines generic upper-layer managed objects. This Recommendation | International Standard: - establishes a model for common supporting upper layer objects; - provides generic and formal definitions

定价: 1092元 / 折扣价: 929

在线阅读 收 藏

Information technology - Open Systems Interconnection - Connection-oriented presentation protocol: Protocol specification AMENDMENT 1: Efficiency enhancements

定价: 182元 / 折扣价: 155

在线阅读 收 藏

Information technology - Open Systems Interconnection - Connection-oriented presentation protocol: Protocol specification AMENDMENT 2: Nested connections functional unit

定价: 182元 / 折扣价: 155

在线阅读 收 藏
12 条记录,每页 10 条,当前第 1 / 2 页 第一页 | 上一页 | 下一页 | 最末页  |     转到第   页