ABSTRACT
Objective To investigate the therapeutic effect of point Shixuan(Ex-UE11) bloodletting on blood viscosity, and pain and numbness in patients with cervical spondylotic radiculopathy. Method One hundred patients with cervical spondylotic radiculopathy were randomized to treatment and control groups. Both groups received conventional acupuncture at Huatuo jiaji(Ex-B2) points. The treatment group received bloodletting therapy in addition. Pain and numbness severity and blood viscosity were recorded before and after treatment. The data were analyzed statistically. Result The pain and numbness, and blood viscosity were improved in both groups of patients with cervical spondylotic radiculopathy, but there were statistically significant differences between the two groups (P<0.01). Conclusion Bloodletting therapy can improve not only the pain and numbness but also blood viscosity in cervical spondylotic radiculopathy. There is a certain correlation between the two.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the variation of the corrosion resistance of anodized oxidation film on titanium by electrochemical methods.</p><p><b>METHODS</b>TiO2 nanotube layer was formed on Ti surface by anodization. The morphology was observed with scanning electron microscope (SEM) and the crystal phase was analyzed using X-ray diffraction(XRD) before and after annealing. Polarization curves were examined by electrochemical methods.</p><p><b>RESULTS</b>Titanium oxide nanotubes with 80 nm diameter and 400 nm length was seen on Ti after anodization. The annealing nanotubes was anatase crystalline phase by X-ray diffraction analysis. The self-corrosion potential and break-down potential of smooth Ti were significantly lower than TiO2 nanotubes by anodization (P < 0.05). The self-corrosion current and passived current were significantly higher than TiO2 nanotubes by anodization (P < 0.05). Annealing improved the corrosion resistance of anodized oxidation film on titanium.</p><p><b>CONCLUSION</b>The results of electrochemical examinations indicate that the TiO2 nanotubes by anodization increases the corrosion resistance of titanium.</p>
Subject(s)
Corrosion , Microscopy, Electron, Scanning , Nanotubes , Oxidation-Reduction , TitaniumABSTRACT
<p><b>OBJECTIVE</b>To investigate preparation parameters of TiO2 nanotube layer with anodization, and to evaluate the osteoblast activity on TiO2 nanotube layer in vitro.</p><p><b>METHODS</b>Titanium dioxide nanotube layer was grown using anodization method. TiO2 nanotube layers with different structure were obtained by controlling the voltage and time of anodization and rinsing process after anodization. Pure titanium without anodization was used as control. Osteoblasts were cultivated on the anodizated TiO2 nanotube, and the growth of osteoblasts was then evaluated and analyzed.</p><p><b>RESULTS</b>The voltage, duration of anodization and rinsing process following anodization were key factors to affect morphology of TiO2 nanotube layer. The area of osteoblast cultured on TiO2 nanotube layer was larger than that on pure titanium. Results from methylthiazol tetrazolium (MTT) test showed that the proliferation of osteoblasts after 96 h cultivation on TiO2 nanotube layer (0.62 +/- 0.02) was significantly higher than that on unanodizated titanium (0.55 +/- 0.03, P < 0.05). Three weeks later, the alkaline phosphatase (ALP) activity on TiO2 nanotube layer [(130.8 +/- 5.1) A(405)/mg] was significantly higher than that on unanodizated titanium [(109.6 +/- 4.5) A(405)/mg, P < 0.05].</p><p><b>CONCLUSIONS</b>The structure of TiO2 nanotube layer was greatly associated with anodization voltage. The TiO2 nanotube layer had a positive effect on osteoblast behavior.</p>