861 Marsland et al Figure 4. Graph to show mean tendon displacement during cyclic loading. In both groups, statistically significant displacement occurred compared with baseline (P < .001), but there was no significant difference comparing groups (P = .35). Figure 5. Lateral view of a left foot specimen. Tunnel deformity observed in the specimen that failed during cyclic testing after interference screw fixation. Figure 6. Lateral view of a right foot specimen. Deformity after completion of a load-to-failure test is noted on the inferior side of the pilot hole, correlating to the site of the screw insertion. In this specimen, the interference screw pulled out with the tendon. consistent. All PW specimens failed at the tendon-to-tendon repair site. All specimens in the screw group failed by tendon pullout, leaving the screw in situ in some cases (n = 6) and pulling the screw out in others (n = 5). Posttest examination revealed tunnel deformity or fracture in all specimens (Figures 5-7). Pilot hole diameter did not affect tendon pullout strength significantly: specimens with pilot holes ranging from 5.5 to 6.0 mm had a mean load to failure of 504.5 N; those with pilot holes 6.5 to 7.0 mm had a mean load to failure of 493.2 N (P = .9). Discussion The current cadaveric study has shown that tendon displacement under cyclic loading and load to failure were comparable for both the ISF and PW techniques, accepting Figure 7. Pilot hole fracture after a load-to-failure to test. The interference screw remains in situ.