Acetabular Cup Markings for Surgical Alignment Precision

The patent applies the copying principle by transferring the orientation information from the trial cup to the implant cup through markings. The trial cup includes markings (such as horizon markings and clock markings) that indicate its orientation relative to anatomical landmarks. After removing the trial cup, the surgeon uses the implant cup with corresponding markings to replicate the same orientation by aligning the markings with the same anatomical landmarks, thus copying the trial cup's orientation without requiring complex measurement devices.

The patent applies the color changes principle by using visually distinct markings on the acetabular cup. The cup includes horizon markings (such as a horizon line or arc) and clock markings (numerical indicators around the rim) that provide visual references for orientation. These markings change the visual appearance of the cup surface, allowing surgeons to easily determine the cup's orientation relative to anatomical landmarks and to replicate the orientation of the trial cup.

The patent applies the segmentation principle by dividing the orientation indication system into distinct marking elements on the cup. The horizon markings are segmented into specific features (such as a horizon line at a predetermined distance from the rim, or an arc with angular indications). The clock markings are segmented into numerical indicators positioned at specific angles around the rim. This segmentation allows each marking element to be independently manufactured and positioned, simplifying the overall manufacturing process while maintaining high orientation measurement accuracy.