Artificial Joint Replacement

From Bone & Joint Journal (Formerly known as JBJS)

Retrieval analysis of squeaking alumina ceramic-on-ceramic bearings

(courtesy of W. L. Walter et al.)

Figs. 1a - 1b

Figure 1a - pre-operative anteropesterior radiograph of a squeaking hip showing liner-neck impingement (arrow). Figure 1b - photograph showing the regions of edge loading on the retrieved femoral head and liner highlighted by rubbing the surface with a pencil lead.

Fig. 2

Photograph of the retrieved femoral head and liner of the squeaking hip of a 46-year-old-main. At retrieval there was no evidence of impingement on either the neck or the rim of the titanium shell. The ceramic bearing showed a large area of wear due to edge loading, highlighted using a surgical marking pen and removing excess ink with a dry cloth.

Bisphosphonate

Mechanism of action

Bisphosphonate side effects

• Osteonecrosis of bisphosphonate
• Atypical fracture

ROM