Fig. 4From: Fixation stability comparison of bone screws based on thread design: buttress thread, triangle thread, and square threadFixation stabilities of buttress-, triangle- and square-threaded screw–DCP constructs implanted in the PU foam under cyclic craniocaudal loading (a, b) and cyclic torsional loading (c, d) of the foam block. (One-way ANOVA: *P ≤ 0.05)Back to article page