Patient 6 was a 61-year-old Caucasian man operated on the right hip. The paired components in the initial surgery were ceramic-on-polyethylene, and the reason for revision was loosening of the cup. He received a titanium sleeve size XL, and no additional screws were required. His HHS increased from 50 before surgery to 90 at the 2-year follow-up examination. His VAS score for pain improved from 6.0 to 1.0, and his VAS score for satisfaction rose from 7.0 to 9.0. This patient showed a grade I heterotopic ossification according to the Brooker classification [].
Patient 7 was a 62-year-old Caucasian woman operated on the right hip. The paired components in the initial surgery were ceramic-on-polyethylene, and the reason for revision was loosening of the cup. She received a titanium sleeve size XL, and no additional screws were required. Her HHS increased from 39 before surgery to 92 at the 2-year follow-up visit. Her VAS score for pain improved from 8.0 to 0.0, and her VAS score for satisfaction increased from 3.0 to 10. No heterotopic ossification was observed.