The edgewise appliance has endured the test of time. This "worthwhile" invention has evolved from its inventor, Edward H. Angle, who was determined to use it to correct malocclusions while preserving "the full complement of teeth, ". Charles H. Tweed who, after countless failures, introduced the extraction of four first premolars and anchorage preparation to produce facial balance. It continues through years of achievements to date and will continue in its successors benefiting countless patients. This book explains basic principles of standard edgewise technique.