Nickel–titanium orthodontic wires (NTWs) play an essential role in treatment. However, their corrosion and aesthetic properties limit applications. To improve the effects of nickel–titanium archwires, we prepared aluminium–silicon dioxide (Al–SiO2) as a biocompatible layer coated onto NTWs. The Al–SiO2 coating was first fabricated using physical vapor deposition magnetron sputtering, its physic...

the nylon and nylon/lycra yarns were coated with electrically conductive polymers such as polyaniline and polypyrrole, via chemical polymerization process. electrical conductivity of the coated yarns was measured at variousstrain levels using two-point probe technique and their strain sensitivities were studied. the results showed that, electrical conductivity of the coated yarns decreased with...

long-term use of indwelling medical catheters has often been hindered by catheter-associated nosocomial infections. in this study the effectiveness of silver coating of polystyrene and polyethylene polymers was investigated. polymer pieces of 2 cm2 each were coated with a thin layer of silver using electroless plating technique. silver-coated polymers were challenged with cultures of four diffe...

An adult high angle Class I with bimaxillary protrusion was treated by extraction of four first premolars. Application of a rectangular NiTi archwire from the beginning of the active treatment period, in combination with J-hook headgear, was used to facilitate the vertical control and reduce the dental and lip protrusion. Satisfactory treatment results were obtained after twenty-four months, wi...

The 2 x 4 appliance comprises bonds on the maxillary incisors, bands on the first permanent maxillary molars and a continuous archwire. The appliance is used in the early mixed dentition for treatment of both anterior crossbites and alignment of ectopic incisors. Four cases using this appliance are presented. This appliance offers many advantages over alternative techniques as it provides compl...