Backside Wear Analysis of Retrieved Acetabular Liners with a Press-Fit Locking Mechanism in Comparison to Wear Simulation In Vitro

Figure 8

SEM images from the backside of the liners. (a) In vitro tested liners P-, Section  7 with scratches and visible machining marks; (b) in vitro tested liner P-, Section  5 with apparently considerable abrasion but with machining marks still visible; (c) in vitro tested liner P-Cup, Section  3 with multiple screw indentations and clear machining lines on both sides of the hole; (d) retrieval P-Cup, edge between Sections  2 and 4 with small abrasion/deformation.

(a)

(b)

(c)

(d)