In the endeavor to provide beautiful smiles to the patients, an Orthodontist is blessed with a wide array of fixed appliances that can be used, although often times this may turn out to be a bane due to lack of consensus and scientific evidence, as to which appliance truly works the best. This book provides an in-depth analysis and understanding of the efficiency of three commonly used fixed orthodontic appliances - Pre-adjusted edgewise, Tip-edge and Begg - in the treatment of Class I Bimaxillary Protrusion cases. The book features description of the three appliance types, characteristics of bimaxillary protrusion cases, dentoalveolar and soft-tissue changes produced by fixed appliances, measurement of incisor intrusion and molar extrusion using Centroid analysis and a detailed discussion on the ICON Index devised by Richmond & Shaw with respect to Bimaxillary protrusion cases . The book can be particularly useful to Orthodontic practitioners, academicians, researchers & students interested in gaining new perspectives and understanding the working and clinical efficiency of the fixed orthodontic appliances, while discovering the methodology of a research study to do so.