[Sliding mechanics in orthodontic treatment with the straight wire]

The principles of straight arch technique are described and the mechanical characteristics of contemporary pretorqued, preangulated "straight arch" appliances are summarized. A step wise approach is presented for efficient orthodontic tooth movement using sliding mechanics with .022" straight arch appliances. The steps are: 1) alignment and leveling; 2) molar correction and space closure; 3) finishing. Specific suggestions are made for wires and force elements best suited to sliding mechanics.