Retrospective Study
Copyright ©The Author(s) 2021.
World J Clin Cases. Aug 6, 2021; 9(22): 6300-6307
Published online Aug 6, 2021. doi: 10.12998/wjcc.v9.i22.6300
Figure 1
Figure 1 Postoperative reexamination of jumbo cup.
Figure 2
Figure 2 The center of this circle was assumed to be the hip joint center[11]. After the left revision total hip arthroplasty obtained anteroposterior pelvic radiographs with a giant cup showed that the revision cup was larger than the contralateral acetabulum. The teardrop line intersects the lower edge of the cup, indicating that jumbo cup is placed in planned position that the lower edge of cup at the lower edge of acetabulum. The medium line is parallel to the lower edge of teardrop line and intersects center of right hip. The upper end line parallel to the tear drop line intersects center of the left giant cup. The distance (arrows) between two lines is labeled as elevated height of rotating center occurred in applying jumbo cup.
Figure 3
Figure 3 The X-ray photogrammetry used to determine relative center elevation and upper cup position of the hip joint is shown[11]. TL: Teardrop line; a’: Center height of hip joint of jumbo cup; a: Center height of hip joint offside; b’: Horizontal distance between teardrop and teardrop line and center line of jumbo cup hip; b: Horizontal distance between vertical line crossed teardrop and center of contralateral hip joint; c: The amount of elevation of center of hip joint (a’-a); d: The amount of elevation of center of hip joint due to the upper acetabular cup.