A new orthodontic straight wire bracket positioning gauge - Ravi Gauge had been developed by Dr.Ravi Kumar, here at Academy of Fixed Orthodontics. I has a vertical positioner which helps in aligning the center line of the bracket to the axial line of the teeth. It also has two prongs which helps to align the bracket horizontally, while the center portion presses the bracket onto the teeth

See the complete article here
http://www.webdental.com/profiles/blogs/new-orthodontic-bracket/