Figure 2: Image showing the OPS system (Corin Group). A guide and acetabular model are created for each patient. The soft tissue in the acetabular fossa is excised, and the guide is inserted and compared with the 3D printed model to confirm accurate seating in the acetabulum. A laser handle is attached to the guide to focus a laser onto the operating room wall. A second, pelvic-mounted laser is then directed to match this point on the wall. Use of this second laser allows for maintenance of the laser point while reaming the acetabulum. The implant introducer has a laser attachment, which has to line up with the pelvic-fixed laser on the wall to ascertain the correct inclination and anteversion of the implant. The 3D printed model can also be used to demonstrate the expected overhang of native bone as a second check of correct implant placement. (Courtesy of Corin Group, Pymble, NSW, Australia.)
...read more