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To determine accuracy, a CPT hip implant (Stem) was cemented in a proximal femur (Bone) and removed from the cement mantle. The bone was fixed to a wooden board and the stem was fixed to 3 stages, allowing movement of the stem in controlled steps along the Y- and Z-axes (translation) and about the Y-axis (rotation). To assess translations along the X-axis, the bone and stem were rotated 90° about the Y-axis and the “Z-stage” was used to translate the stem in a mediolateral direction.
