Developmental dysplasia of the hip (DDH) is a very common problem all over the world. While the relationship between the femoral head and the acetabulum is normal in most of the patients in the early postpartum period, joint pathologies can be observed over time due to some problems in the soft tissues and bone structures around the hip. These pathologies can lead to several problems from delayed physiological development or mild capsular laxity to acetabular insufficiency, subluxation, and hip dislocation. With early diagnosis and treatment, serious complications that can affect the whole life of the patient can be prevented. Orthotic applications are the gold standard in the treatment of patients with a reducible joint that is detected in the first six months of life. Today, there are many different types and models of orthoses, and it is necessary to choose an orthosis according to the age of the patient and the degree of pathology. Orthoses used in the treatment of DDH are divided into two groups as dynamic and static. The most widely used dynamic orthosis is the Pavlik harness, and Tubingen orthosis, Frejka pillow, Von Rosen device and Aberdeen splint are also included in the dynamic orthoses group. The most used static orthoses are Ilfeld device, Rhino, and abduction orthoses. Dynamic orthoses are generally used for patients whose hips can be reduced before walking age, but do not need plaster cast for stabilization as well as for patients with dislocated hips for the purpose of reduction. Static orthoses, on the other hand, are preferred as an alternative method to closed reduction and casting in patients more than 6-9 months of age and who need abduction for a long time.