RT Journal Article SR Electronic T1 An Introduction to the Biomechanics of Joints and Joint Replacement JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 439 OP 440 DO 10.1136/ard.41.4.439-c VO 41 IS 4 A1 D. L. Gardner YR 1982 UL http://ard.bmj.com/content/41/4/439.3.abstract AB