PMC6476136_01
Preoperative AP and lateral X-rays showing stage IV osteoarthritis of the left hip.
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fig1
Tracker mount and pins utilized in CAS.
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Usual placement is three cm below the tip of the greater trochanter on the posterior lateral border.  Figure 2 displays the pins and femoral tracker base that the camera is placed on.
Intraoperative X-ray of the left hip demonstrating satisfactory positioning of the implants. The tracker base for the camera is visualized on the greater trochanter of the femur.
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fig3
An intraoperative pelvis X-ray (Figure 3) was taken as a record to ensure accuracy, because CAS is a new technology.
AP and lateral X-ray of the left hip 1 postoperative day after insertion of implants demonstrating anterior dislocation of left femoral head prosthesis and fracture of the greater trochanter.
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fig4
An X-ray demonstrated an anterior dislocation of the left femoral head prosthesis and fracture of the greater trochanter (Figure 4).
Pelvic X-ray of the left hip one postoperative day of THA revision demonstrating satisfactory positioning of the implants and placement of trochanteric cable plate. Wire was placed around the inferior portion of the Zimmer 51 mm short stature plate at the lesser trochanter and below. A second wire was placed at the upper trochanter at the implant junction. A third wire was placed around the greater trochanter.
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fig5
Postoperatively, X-ray findings confirmed correct alignment (Figure 5).
AP and lateral hip and standing pelvic X-ray at a six-week postoperative visit that demonstrate satisfactory positioning of the implants and trochanteric cable plate.
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fig6
A six-week postoperative X-ray demonstrated (Figure 6) optimal position of the plate without evidence of mechanical failure, breakage, or erosive changes.