Figure 5

Illustration of the stress distribution and micromotion with the conventional reaming technique (A) and with the anatomical technique (B). The maxim micromotion (46 μm) was in the bottom of the acetabulum (Point 4) with the conventional reaming technique, and the stress concentration was in the superior portion of the acetabulum (yellow arrow) (A). The maximum micromotion (37 μm) was in the bottom of the acetabulum (Point 4) with the anatomical technique. There was no stress concentration in the superior portion of the acetabulum, and the stress was similar in the bottom and other areas (B).