Deviations in positioning variable pitch screws- scaphoid waist fractures.

Introduction: Operative therapy using a headless cannulated variable pitch compression screw is the gold standard for the treatment of instable scaphoid fractures.

Hypothesis: Deviation from the central placement is associated with a loss of stability and stiffness.

Material And Methods: An artificial bone model was manufactured and different screw positions (central, 10° and 20° to the long axis) were assessed.

Bond strength of an alkylene bis(dilactoyl)-methacrylate bone adhesive: a biomechanical evaluation in sheep.

The purpose of this study is to assess the mechanical efficacy of an alkylene bis(dilactoyl)-methacrylate-based degradable bone adhesive in 36 sheep. Bone segmentation with osteotomies of the metaphyseal ulna was performed and adhesive was applied into the osteotomy gaps in 18 sheep. The remaining 18 animals served as controls.

[Bond strength of a bioresorbable bone adhesive: results of a biomechanical study in a sheep model].

The purpose of this study was to investigate the bond strength of a new bone adhesive based on ethylene glycol-oligolactide-bismethacrylate on 36 sheep. A 2-cm metaphysial segment was produced on the ulna of each sheep by an oscillating saw and it was not stabilized by any type of additional osteosynthesis. Adhesive was applied to the osteotomy gaps in 18 sheep, the remaining 18 animals served as controls.