A Functional Appliance System for the Correction of Class II Relationships

Abstract

A technique is described for the correction of Class II malocclusion involving a functional appliance and consisting of three phases.

1.	Adjustment of posterior arch width and dental alignment, using semi-rapid maxillary expansion by means of an upper removable appliance, to co-ordinate the anticipated positions for the arches.
2.	Correction of the Class II dental relationships using a modification of the twin-block functional appliance.
3.	Retention, using an upper removable appliance with a very steep anterior bite plane.

The technique is illustrated by a case report.

Index words:

• Class II treatment
• Functional appliance