Biomechanical Study on osteotomized tibias fixed with unilateral adjustable external fixator

Abstract

Five fresh tibias removed from 30-40 years old dead males were osteotomized at one-third supra-medium segment and then fixed by an unilateral adjustable external fixator (UAEF) to be used as a model of external fixation of tibial fracture. For each loading test under different configurations of UAEF, the ratio of the force-displacement was used to determine its stiffness value. The weakest mode of the UAEF device is in AP bending. Under each mode of compression, distraction, anteroposterial and lateral bending and torsion loading, increasing the pin number or pin diameter or pin separation, and/or reduction of pin group separation can significantly increase the stiffness values of UAEF (P < 0.01). These data revealed that UAEF is suitable for the external fixation of tibial fracture.

Development and Application of Urban Water Supplying Network System Based on GIS

“…Taking urban water supplying network of a city in Fujian Province as an example and making use of GIS, a complete and accurate water supplying system will be set up. Facts have proved that water supplying network system based on GIS can provide timely the necessary and accurate information thus the efficiency of managing the water supply network is greatly improved [1,2] .…”