Anteroposterior radiograph made ten years and six months after the surgery demonstrating Kalamchi class-II osteonecrosis with valgus angulation of the right hip, which resulted in hip dysplasia and classification of the outcome as Severin class III. The outcome was considered asymmetrical because the Severin class in the left hip was Ib, which was more than one grade different from the outcome in the right hip.

Yield (Fig. 1-A) and viability (Fig. 1-B) of nucleated cells harvested from the bone marrow (n = 22 donors). Data for the anterior (AIC) and posterior iliac crest (PIC) of the same donor are connected by a solid line.

Figs. 1-A, 1-B, and 1-C Photomicrographs illustrating the Oxford-ALVAL scoring system (hematoxylin and eosin). Fig. 1-A Grade 1 (fewer than five lymphocytes around vessels) (×250). Fig. 1-B Grade 2 (five to ten lymphocytes around vessels) (×250). Fig. 1-C Grade 3 (more than ten lymphocytes around vessels) (×40).

Incidence of arthroplasty in patients with HIV/AIDS over time in the United States. The national estimates were calculated from the NIS with use of discharge weights. THA = total hip arthroplasty, and TKA = total knee arthroplasty.

The scatterplot used to determine the “safe zone” (shown as a box) for acetabular component placement in the original 1978 study by Lewinnek et al. Note that most but not all of the dislocations occurred outside of this box. (Reproduced from: Lewinnek GE, Lewis JL, Tarr R, Compere CL, Zimmerman JR. Dislocations after total hip-replacement arthroplasties. J Bone Joint Surg Am. 1978, Mar;60[2]:217-20.)

Fig. 1 Coronal short tau inversion recovery (STIR) magnetic resonance image acquired with use of metal artifact reduction sequence (MARS), demonstrating a large pseudotumor (arrows) surrounding the prosthetic hip joint, approximately twenty-one months following total hip arthroplasty (Case 3). As a reference, the greater trochanter (GT), modular prosthetic femoral neck (N), and modular femoral head (H) are labeled.

The CONSORT (Consolidated Standards of Reporting Trials) diagram. ICBG = iliac crest bone graft.

Coronal fast-spin-echo images of the right (A) and left (C) hips in an asymptomatic subject who underwent bilateral metal-on-metal hip resurfacing arthroplasty. Note the susceptibility artefact generated by the cobalt-chromium prostheses, which obscures visualization of the synovium. On the MAVRIC SL image of the right hip (B), synovitis is evident with fluid-signal-intensity expansion of the pseudocapsule (black arrows). On the MAVRIC SL image of the left hip (D), there is no synovitis and the pseudocapsule (white arrows) is closely applied to the femoral neck.

Risk of common peroneal nerve palsy according to BMI. The error bars indicate the 95% CI.

Diagram illustrating setup of the apparatus for controlling pelvic rotation and tilt. An enclosure was constructed for the cadaveric pelvis to facilitate precise rotation and tilting. This comprised a box with a position-pointing device and three wooden wedges to allow accurate rotation and tilting of the flat baseboard by ±5°, ±10°, and ±15°. Relevant anatomical landmarks such as the vertebral body of S1 and the anterior superior iliac spines were left prominently displayed outside the foam fixation. These landmarks were subsequently used to center the x-ray beam on the pelvis.