Abstract: On the cover: For patients with Class II malocclusion, treatment can be conducted in two phases: an early phase with a functional appliance to ''grow the mandible,'' followed by a later phase of multibracket treatment.Alternatively, they can be treated with a single phase of treatment.Previous attempts to gauge the effect of 2-phase treatment on the condyles have been hampered by limitations of 2-dimensional cephalometric imaging.Robert Y Wei and colleagues at the University of Melbourne used 3D imaging to quantify and qualify condylar changes during the initial treatment with the Herbst appliance and the subsequent orthodontic treatment phase in adolescents with Class II Division 1 malocclusion.They compared the 2-phase treatment group with a matched control sample treated in a single-phase protocol with Class II elastics.The images on the cover show the stable region of the mandible used for 3D voxel-based registration.The smiling patient on the cover is Richelle Salawanej.She was treated by Vicente Gonzalez-Costa, Middleburg, The Netherlands.