Evaluation of the Microstructural Characteristics of Bone Surrounding Anchor Screws Placed under a Horizontal Load by Exploring the Orientation of Biological Apatite Crystals and Collagen Fiber Anisotropy

The objective of this study was to carry out quantitative evaluations the microstructural characteristics bone surrounding anchor screws placed under a horizontal load and on compressed non-compressed sides by investigating orientation biological apatite (BAp) crystals collagen fiber anisotropy. Anchor were implanted in femurs adult rats. They divided into those (horizontal loading group, n = 4), not (unloaded sham group rats that did undergo femoral screw implantation. In addition histological observations, BAp crystal anisotropy also analyzed. Osteocytes adjacent side rounder shape than normal femurs, unloaded group. Collagen fibers showed uniaxial preferential direction traction These results demonstrated osteogenesis around sustained gave structural differed some respects from bone. acquired micro/nanostructural adapted its new mechanical environment.