Total hip arthroplasty for sequelae of childhood hip disorders: Current review of management to achieve hip centre restoration

Figure 2 Templating with digital X-rays using a computer. A: 3-cm diameter metal ball is strapped to the thigh for X-ray. The scale on the template is matched to 3 cm by using the zooming feature (zoom in or zoom out); B: Match the size of the acetabulum to the correct size. Care is taken to assess the optimal size with respect to the teardrop, lateral edge, and acetabular floor. Arrows indicating the ball size matched and the template matching acetabular component size.