Understanding the biomechanical factors in orthodontics is important in order to improve the overall effectiveness of actual clinical treatment. An accurate method to study the three-dimensional(3D)force systems and the resulting movements of teeth during orthodontic treatment is needed along with the understanding of the material properties of any orthodontic wire. Until recently, most of the orthodontic biomechanics literature was limited to two-dimensional experimental studies. Recent advances in three-dimensional computer modeling have also been developed but have been limited to the manual control of tooth movement. Therefore, this book details how a cost-effective orthodontic wire tester that is capable of three-dimensional measurements and analyses of orthodontic force systems was developed. The successful development of the orthodontic wire tester, including its computer protocols, will allow orthodontists to determine, with great accuracy, the forces and torques acting at precise locations on the teeth. It will also allow for future simulation research on new and existing orthodontic clinical applications by orthodontists and biomedical engineers.