Twin block appliance is very effective in a growing patient. The successful use of this appliance in the treatment of skeletal Class
II malocclusion is based upon factors such as; age of patient, compliance of the patient and other case selection criteria. This case
report includes a 14-year-old boy who was treated with twin block appliance. If treated timely, growth modification and orthopedic
effects with this appliance can be achieved in a growing individual. This appliance is very successful in a patient with retruded
mandible and well aligned arches in whom VTO is positive. This brings the mandible forward and improves the profile immediately.