Potential use of a new fully porous multi-hole titanium acetabular component with cemented liner fixation

Background. 3D printing technology has found widespread use in the production of custom-made and mass-produced acetabular components. Since the end of 2022, a new fully porous acetabular component with multiple screw holes and cemented liner fixation has been available. Research questions. In which clinical scenarios were the fully porous acetabular components used, and with which friction units? Which additional elements were used to achieve reliable primary fixation? What are the short-term survival rates of these implants and the functional outcomes of patients? Methods. The new component was used in 106 patients between October 2023 and December 2024. There were 55 (51.9%) women and 51 (48.1%) men. The average age was 60.7 years. In 11 (10.4%) cases, implantation was performed in complex cases of primary hip arthroplasty; in 48 (45.3%) cases, during aseptic revisions; and in 47 (44.3%) cases, during the second stage of infection-related revision. In all cases, screws were used for fixation, the number of which ranged from 2 to 10, with an average of 5.5. In 38 (35.8%) cases, acetabular components were combined with augments and/or cup-cage systems. In 47 (44.3%) cases, dual mobility cement fixation systems were used as a friction unit; in the remaining cases, cemented polyethylene liners were used. Results. The mean follow-up period was 14.1 months (range, 9-23 months). There were 18 (17.0%) complications, 10 of which required repeat revisions. Complications included 6 (5.7%) cases of infection, 5 (4.7%) cases of recurrent dislocations, 3 patients developing sciatic neuropathy, 2 cases of femoral component loosening, and 2 cases of periprosthetic fractures. No aseptic loosening of the acetabular component was observed. Conclusions. The advantages of the new acetabular component include the possibility of extended screw fixation and the use of different bearing surfaces, including dual mobility. This ensures reliable primary fixation and reduces the risk of recurrent dislocations. The use of a fully porous titanium acetabular cup with a cemented liner in complex primary and revision hip arthroplasty has demonstrated good radiographic results and early survival with a minimum follow-up of 9 months.