Synchronous straight-wire part 1: theory

Abstract

Synchronous Straight-Wire (SSW) is the trademark of the authors Charles Cole and Jon Hammond. This paper is split into two parts. Part one introduces the SSW technique, explains the reasons for its development and outlines theory. Part two illustrates the technique and compares it to others. The aim of this paper is to introduce the SSW technique, which is designed to produce simultaneous synchronized movement and thereby improve efficiency. Complex concurrent movements require planning and co-ordination. An Appliance Configuration Table (ACT) facilitates this and enables the clinician to plan the required movements to correct tooth position fully before linking these to required forces for resolution. Forty cases treated using SSW are compared with other techniques. Efficiency of tooth movement is monitored using a treatment efficiency index (TEI). When compared with other techniques, SSW demonstrates improved efficiency. The technique offers a more efficient means of undertaking fixed appliance treatments and highlights the advantages of pre-programming the entire appliance (not just the brackets) and of using a coherent mechanism to facilitate 3-dimensional movements. Clinical Relevance: The Synchronous Straight-Wire (SSW) technique is a means of organizing simultaneous treatment events by synchronizing, rather than sequencing, tooth movement.