The Rect-spring: a new device for treating ectopically erupting permanent molars.

The Rect-spring, a new device that simply and effectively resolves ectopically erupting molars, may be applied in cases where the ectopically erupted molar is entrapped by more than two mm. Its design, scientifically logical for changing the direction of force, delivers a continuous distalizing and uprighting force. The Rect-spring can be easily manufactured at chairside and delivered on the same day without the need to take impressions or perform laboratory procedures.