Description:<br />For teeth whitening and dental orthodontic operation、 the dryer is<br />very practical and necessary because the teeth should to keep dry、<br />wet tooth surface can result in adhesive bonding effect down.<br />The use of dental drying after the tooth can effectively improve the<br />adhesive strength is up to 30%、 which can obviously promote <br />the composite resin curing strength、 tensile adhesive strength、 shear<br />bond strength、 resin bonding effect in.<br />The nozzle can be disassembled and disinfection、 effectively <br />prevent cross infection.