Functional analysis of the cement anchor/fibrin interface. (A) Custom built mechanical tester used to assess interface strength. (a) Force transducer, (b) shaped grip, (c) moving grip, and (d) stepper motor. (B) Testing mechanical properties of the cement anchor/fibrin interface. (i) Ligament construct placed upside down into grips prior to testing, (ii) ligament construct undergoing mechanical test. Tissue can be seen detaching from the right-hand side cement anchor. (C) Ultimate tensile stress and (D) maximum strain values for the anchor shapes E, F, G, H, and I. Results are presented as mean ± SEM for n = 10 (E, G, H) and n = 8 (F, I). Asterisk indicates significantly higher than all other shapes, whereas plus symbol indicates significantly higher than shape I (p < 0.05)