Tuberosity healing about the prosthesis occurred in thirty-five shoulders. The mean pain score improved from 8.3 preoperatively to 4.1 at the time of follow-up GDC-0068 ic50 (p < 0.001). The average active shoulder elevation and external rotation improved from 46 degrees and 26 degrees to 104 degrees and 50 degrees (p < 0.001). Shoulders with anatomic or nearly anatomic healing
of the tuberosities had greater active elevation at the time of final follow-up (p = 0.02). There were fourteen complications in twelve patients, with twelve reoperations including five revisions. Kaplan-Meier survivorship with revision as the end point was 97% (95% confidence interval [CI]: 94.3, 100) at one year and 93% (95% CI: 88.0, 99.2) at five, ten, and twenty years.
Conclusions: Shoulder arthroplasty decreases pain and improves function in patients with a proximal humeral nonunion. However, the overall results are satisfactory in less than half of the patients. Tuberosity healing is inconsistent and influences the functional outcome.”
“The microstructure of the polyacrylonitrile (PAN)-stabilized fibers was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and high-resolution transmission electron microscope find more (HRTEM). XRD analysis indicated that the chemical reactions sped up notably when temperature was above 250 degrees C.
The crosssection SEM image of the stabilized fibers presented concentric multilayer morphology. TEM images showed that the lamellar-like skin was compact and the core was disorderly
and loose. The vermiculate-like crystallites in the precursor fibers were transferred to spheres during stabilization process. HRTEM images showed that many spheres existed in the stabilized fibers. The exterior of spheres which had annular structure was amorphous phase. The inner of spheres which was not completely stabilized had some crystallite areas. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 113: 2413-2417, selleck kinase inhibitor 2009″
“Broad-frequency dielectric behaviors of multiwalled carbon nanotubes (MWCNTs) embedded in room temperature vulcanization silicone rubber (RT-SR) matrix were studied by analyzing alternating current (ac) impedance spectra, which would make a remarkable contribution for understanding some fundamental electrical properties in the MWCNT/RT-SR nanocomposites. Equivalent circuits of the MWCNT/RT-SR nanocomposites were built, and the law of polarization and mechanism of electric conductance under the ac field were acquired. Two parallel RC circuits in series are the equivalent circuits of the MWCNT/RT-SR composites. At different frequency ranges, dielectric parameters including conductivity, dielectric permittivity, dielectric loss, impedance phase, and magnitude present different behaviors. (C) 2009 American Institute of Physics. [doi:10.1063/1.