ABSTRACT
<p><b>OBJECTIVE</b>To understand the neutralized antibody level of the poliomyelitis among healthy people and provide scientific evidence for the immunization strategy since routine and intensified immunization with oral polio vaccine (OPV) in Fujian province.</p><p><b>METHODS</b>The poliomyelitis antibody level of healthy people were detected by neutralization test of the micro cells.</p><p><b>RESULTS</b>The neutralizing antibody positive rates were 99.0%, 99.3%, 97.5% and GMTs were 1:79.1, 1:31.2, 1:24.7 for polio I, II, III respectively in 400 serum specimens from 1-59 years old. GMTs present a trend of decreasing as age's increasing.</p><p><b>CONCLUSION</b>A protective barrier had been built against poliomyelitis in healthy people in Fujian province through routine and intensified immunization with OPV.</p>
Subject(s)
Adolescent , Adult , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Young Adult , Antibodies, Neutralizing , Blood , Allergy and Immunology , Antibodies, Viral , Blood , Allergy and Immunology , China , Health Status , Poliomyelitis , Allergy and Immunology , Virology , Poliovirus Vaccine, Oral , Allergy and Immunology , Population Surveillance , VaccinationABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of loop configuration on appliance stiffness of stainless steel round wire.</p><p><b>METHODS</b>Some stainless steel round wires with various cross-sectional dimension (0.36, 0.41, 0.46 mm) were selected. Box loops, double horizontal loops, and double vertical loops were manufactured according to established parameters, and loading experiments were carried out with a micro-orthodontic archwire testing apparatus.</p><p><b>RESULTS</b>When the cross-sectional dimension and the span were identical, the appliance stiffness of the box loops, double horizontal loops, and double vertical loops increased successively.</p><p><b>CONCLUSION</b>Configuration of loops exert a great influence on appliance stiffness, and the mechanical properties of box loop are optimal. The force generated by box loop was lighter, slowly decreasing, and easier to be controlled. The activation range of box loop (0.41 mm) was appropriate when the produced optimal moment was between 0.01-0.02 N.m. Box loop (0.41 mm) is preferred to rectify the individual tooth with mild or moderate mesiodistal displacement.</p>