Modeling and Numerical Analysis of a Cervical Spine Unit - Biologically Responsive Biomaterials for Tissue Engineering - page 162

Fig. 7.21 Strain variation along the bone threads for Sr1 superior and inferior mountings

Fig. 7.22 Bone strains on Sr2 superior and inferior mountings

Fig. 7.23 Strain variation along the bone threads for Sr2 superior and inferior mountings

threads, will distribute the strains to a larger bone volume. The biomechanical
effect has a very good score here because of the pullout strength enhancement. The
disadvantages in this case are caused by the poor tapping characteristics of this
screw. It behaves well in cancellous bone, but generates cracks when penetrating
the cortical layers.