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    • Functional acetabular safe zones based on patient-specific factors during total hip arthroplasty are theorized to result in more optimal component stability than the use of traditional safe zones based on static targets.
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    • Preoperative planning that takes into account functional pelvic positions and spinopelvic mobility is increasingly recommended.
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    • Computer navigation and robotics can be utilized to help accurately achieve the targeted cup position within the functional safe zone.
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    • Each technology platform (imageless and image-based computer navigation and robotics) utilizes a specific referencing method for the pelvis, which influences anteversion and inclination values.
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    • The purpose of this article is to summarize how these different systems reconcile differences in pelvic referencing to ensure that the surgeon achieves the targeted functional cup position.