ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the biomechanical properties of tibial plateau depressed fracture fixed with a net-fixation of Kirschner wires.</p><p><b>METHODS</b>Twenty homemade fracture models were fixed with eight 1.5 mm Kirschner wires in a net-fixation; 20 homemade fracture models were fixed with two 3.5 mm cortical screws. Plane-compressed and dot-compressed test were made on each 10 models of the two groups. The maximal force of anti-ompress and stiffness were measured and evaluated.</p><p><b>RESULTS</b>In plane-compressed test,mean maximal force of anti-compress and stiffness for screw fixation was (1,925.31 +/- 444.26) N and (2.28 +/- 0.53) N/mm2, respectively, for net-fixation was (1,609.62 +/- 277.72) N and (1.90 +/- 0.33) N/mm2, respectively. There was no statistical difference between the two fixation methods (P > 0.05). In dot-compressed test,mean maximal force of anti-compress and stiffness for screw fixation was (411.13 +/- 233.88) N and (2.66 +/- 1.52) N/mm2,respectively,for net-fixation was (1,105.58 +/- 290.66) N and (7.18 +/- 1.89) N/mm2,respectively,the net-fixation was better than that of the screw fixation (P< 0.01).</p><p><b>CONCLUSION</b>Treatment of tibial plateau depressed fracture with a net-fixation of Kirschner wires is a biological fixation and is a reliably method.</p>
Subject(s)
Biomechanical Phenomena , Bone Screws , Fracture Fixation, Internal , Mechanical Phenomena , Tibial Fractures , General SurgeryABSTRACT
OBJECTIVE@#To explore the effect of sodium tungstate on glucose metabolism in adipocytes and its mechanism.@*METHODS@#After 3T3-L1 preadipocytes were differentiated into adipocytes, these adipocytes were incubated with sodium tungstate (0, 150, 300, 500, and 700 micromol/L) for 48 h, and then glucose consumption of the adipocytes was detected by glucose-oxidase assay. Glucose transport was determined by the uptake of 2-deoxy-[3H]-D-glucose, and the expression of glucose transport-4 (GLUT-4) mRNA was identified by semi-quantitative RT-PCR.@*RESULTS@#Sodium tungstate (150 approximately 700 micromol/L) could significantly increase the glucose consumption and glucose transport with a concentration dependent-effect. Sodium tungstate could increase GLUT-4 mRNA expression.@*CONCLUSION@#Sodium tungstate can enhance the glucose metabolism of adipocytes by up-regulating the expression of GLUT-4 mRNA.