Controlled space closure with the edgewise appliance.

This paper deals with the problem of the controlled closure of excess space in either one or both arches after labial segment alignment or overjet reduction has been achieved. The situations that give rise to the problem are listed. The importance of the need for controlled tooth movement, in order to maintain the antero-posterior labial segment position during space closure, is discussed. A detailed account, with illustrations, of the mechanics involved when using an edgewise system is presented.