Computed tomography-based navigation for curved periacetabular osteotomy

Curved periacetabular osteotomy (CPO), a modifi ed Bernese periacetabular osteotomy, has been developed to treat developmental dysplasia of the hip. CPO achieves good anterior and lateral acetabular coverage of the femoral head, resulting in prevention of osteoarthritic progression in the hip. 1 With this procedure, an outward curved osteotomy from the quadrilateral space is considered technically demanding because of limited visualization, with surgeons having to perform the curved osteotomy out of their fi eld of view. A computed tomography (CT)-based navigation system allows surgeons to provide positional information about the surgical instruments to target bones during the operation. This system offers three-dimensional (3D) images and real-time guidance, which improve the accuracy and safety of diffi cult operations. In this report, we present a technique for CPO using CT-based navigation.