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. Author manuscript; available in PMC: 2008 Jun 18.
Published in final edited form as: Spine (Phila Pa 1976). 2008 Mar 1;33(5):481–489. doi: 10.1097/BRS.0b013e318165e3be

Figure 1.

Figure 1

Implications of symmetric vs. one-sided motion patterns for the center of rotation in a mobile bearing TDR. A symmetric wear pattern suggests that the center of rotation is near the center of the mobile bearing. In a one-sided wear pattern, in which motion occurs predominantly between the superior endplate and the superior face of the core, the center of rotation is expected below the inferior endplate.