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the Gravimetrical method

The gravimetrical method is classical and is recommended to application by standards ISO 14243-1, ISO 14242-3:2009, ISO 7206-4:2010. However measurement of extent of deterioration on weight loss is not simple method since implantaty have very low speed of deterioration (drawing 1.14).

At definition of extent of deterioration the sample is weighed before test, and the difference between these values is weight loss at chafing implantata (3). Thus there are complexities when the subject of inquiry is placed in the basin with a liquid (for example, sinovialnoj) as implantat its insignificant quantity can absorb. In that case weight changes it is defined sledujushch

Where Δ W - weight change, - loss weight at deterioration, -

Gain in weight for the account liquid sorbtion.

Thus, weight change can be positive or negative magnitude depending on its loss at deterioration, and also from the tested materials, capable to absorb a liquid. At application of an observed method rather endoproteza with friction pair «metal - metal» is not present necessity to consider sorbtion by metal components rezervuarnoj a liquid. Despite it the observed method is exact enough.

Weight loss because of a friction of components endoproteza about elements of the test car, use of high-precision scales for weight measurement over the range from 0,01 to 5 mg depending on test regimes, and also machining of components of the investigated sample after test for the purpose of liquid/lubricant removal are deficiencies of an observed method. Accuracy of results of reproduced tests reaches 5 %. The observed method is applied in such test units, as BioPuls Dual-Station ISO HipSimulator [138] and in analogous modifications.

1.3.2

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Scientific source ZHIDKOV Alexey Vladimirovich. the ELECTRORESISTANCE METHOD And the DIAGNOSTIC DEVICE tribouzla with the spherical form of details (ON an instance endoproteza tazobedrennogo a joint with friction pair «metal - metal»). The dissertation on competition of a scientific degree of a Cand.Tech.Sci. An eagle, 2019. 2019

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