Knee constraint test ASTM F1223

Normative References  

ASTM F1223: Standard Test Method for Determination of Total Knee Replacement Constraint

This test method covers the means by which a TKR constraint may be quantified according to motion delineated by the inherent articular design as determined while under specific loading conditions in an in vitro environment. Tests deemed applicable to the constraint determination are antero-posterior draw, medio-lateral shear, rotary laxity, valgus-varus rotation, and distraction, as applicable. Also covered is the identification of geometrical parameters of the contacting surfaces which would influence this motion and the means of reporting the test results.

In general, the medium (standard) size is tested. The tests are performed at room temperature while keeping the surfaces wet.