The practice of fine Dentistry depends not only on a complete understanding of various applied techniques, but also on the appreciation of the fundamental biological, chemical & physical principles that underlie the applied techniques.As is known it has been ages since the use of metals and alloys in the field of dentistry an understanding of the well balanced relationship that exists between the applied techniques and the basic principles, leads to a broader application of the techniques to serve the needs of clinical dentistry.Development and control of suitable technical procedure for the use of the materials that are available. Limitations on the practitioner's use of any dental materials are controlled by inevitable interrelation of the three factors i.e.Chemistry,Handling characteristics and Performance in service. This book covers the variety of materials used in orthodontic treatment, material used and their properties in detail.