China Array helped design and develop (and now manufactures) a composite dental dispenser made from Polyphenylsulfone (PPSU) and medical grade stainless steel that won a Five Star Award from Reality Dental Aesthetics.
The dispenser can be sterilized using steam, ethylene oxide, hydrogen peroxide or gamma radiation.
Dental composites, used to fill cavities and gaps between teeth, are delivered to the tooth in thin layers and then cured to hardness using blue wavelength light. They must adhere well to the tooth, cure to the desired hardness, and be pleasing aesthetically.
Modern dental composite materials are a complex blend of glass or ceramic particles dispersed in a photo-polymerizable synthetic organic resin matrix.
New systems have been developed to properly blend composites and keep them in the correct suspension and at the right temperature until they can be delivered directly to the tooth. The composite dental gun is critical to this system.
Composites are premixed and packed in compules, small individual cartridges, and kept at a constant temperature to maintain correct dispersion of the component materials.
When the tooth is prepared, the compule is secured in the gun’s tip. The gun’s smooth trigger action delivers the viscous composite in a thin layer (2 to 3 mm thick) while maintaining consistency for optimum fill, adherence and curing.
The gun’s ergonomic design provides the strength and leverage necessary to easily and precisely apply each layer.
Made from high performance thermoplastics and medical grade stainless steel the dispenser is friction and wear resistant ensuring a long life and top performance. It can be autoclaved using any of the common methods: steam, ethylene oxide, vaporized hydrogen peroxide and gamma radiation.
Precise Tolerances: with 17 interconnected, moving parts precision workmanship and dimensional integrity are critical to the functioning of the dispenser. Individual test units have the same smooth action after 28,000 action cycles as on the first one.
Steam autoclaving is a primary sterilization method for medical devices. Temperatures typically range between 121°C to 134°C for 15 to 30 minutes.
Solvay Specialty Polymer's Radel PPSU is unique among amorphous thermoplastics in its ability to withstand more than 1,000 cycles of steam sterilization without any significant loss of properties.