Developmental dysplasia of the hip in adults (DDHA) is most common cause of secondary osteoarthritis. DDHA is more common in female and in most cases is unilateral. This graduate thesis is a short review of the most important treatment modalities. The primary goal of non-surgical treatment is to decrease symptoms and postpone surgery. Since DDHA includes spectrum of different anatomical changes of the hip, the aim of the operative treatment is to reestablish normal biomechanics and anatomy. Therefore, a number of different surgical techniques and approaches were developed over time. Pelvic osteotomies are predominantly performed in young patients with minimal signs of osteoarthritis, while in severe types of DDHA a total hip replacement (THR) is necessary. THR in DDHA is considered as a technically demanding procedure due to abnormal anatomy of the acetabulum and proximal femur which are frequently accompanied with leg length discrepancy. Primary goals of THR are placement of the acetabular cup at normal position, restoration of normal biomechanics and anatomy of the hip, correction of leg length discrepancy and insurance of long term stability of endoprothesis. Different surgical approaches and techniques are developed in addition to insure satisfactory long term results. Modification of lateral approach was developed at Department of Orthopedic Surgery, School of Medicine, University of Zagreb, and Clinical Hospital Centre Zagreb thanks to which is possible to achieve the same results among patients with severe types of DDHA compared to a group of patients with mild types of DDHA. Even though numerous different techniques and approaches are described in literature, there is a lack of long-term follow-up studies based on which it could be possible to conclude which surgical techniques provide the best results and which patient groups are candidates for a particular surgical technique and approach.