BACKGROUND Screw length pertains to stability in various orthopedic fixation devices. There is little or no information on the relationship between plate pullout strength and screw length in anterior lumbar interbody fusion (ALIF) plate constructs in the literature. Such a description may prove useful, especially in the treatment of osteoporotic patients where maximizing construct stability is ...

Roots exert pullout resistance under force, allowing plants to resist uprooting. However, the characteristics of taproot-type shrub species different ages remain unclear. In this study, in order improve our knowledge taproot systems species, we selected Caragana korshinskii Kom. growth periods as research plant and conducted situ root test. The relationships among maximum resistance, peak displ...

Purpose: To evaluate the influence of resin cement type, surface pretreatment and autoclave sterilization on retention Y-TZP crowns to Ti-base abutments. Methods: were designed milled fit Crowns cemented using either a conventional (conventional) with universal adhesive or self-adhesive (self-adhesive), both following no (No) abutment sandblasting (SB) (n=20/group). Half samples subjected in-of...

Introduction: Fracture of the tibial and femoral diaphysis constitutes approximately 7% of fractures occurring in children1. Such fractures are commonly repaired by intra-medullary nailing. While removal of implanted nails is often routinely performed after fracture healing it is not always without complication, often due to difficulty or inability to remove the nail.Currently intra-medullary n...

The adhesion between a polymer melt and substrate is studied in the presence of chemically attached chains on the substrate surface. Extensive molecular dynamics simulations have been carried out to study the effect of temperature, tethered chain areal density (Σ), tethered chain length (Nt), chain bending energy (kθ) and tensile pull velocity (v) on the adhesive failure mechanisms of pullout a...

Materials and methods Eighteen vertebrae were harvested from the lumbar section of six porcine spines ranged from L1 to L3. All vertebrae were instrumented on both pedicles using pedicle screws. Quantitative CT scans were used before instrumentation in order to assess the bone density of each vertebra. Cyclic bending (toggling) load of ± 1mm displacement at 3Hz for 5000 cycles were assigned in ...