Ear deformities are due to trauma , Infection,& congenital. Ideal time to operate on congenital ear deformities is 10 years. At 10 years of age size of ear is same as adult ear, and also get good quality costal cartilage for making cartilage frame work.
The type of surgical technique depends upon severity of deformity and availability of good quality surrounding skin. Ear is a three dimensional structure needs reconstruction in multiple stages.