Trabecular titanium acetabular cup in patients with medial femoral neck fracture: Survivorship analysis and clinical and radiological outcomes.

Abstract

Background: Clinical studies using Trabecular Titanium™ acetabular cups have shown promising short and medium-term results. This material, due to its macro and micro surface roughness, provides a substrate for osseointegration and enhances implant stability. However, there is a lack of evidence in the literature on the use of this material in patients with femoral neck fracture.

Aim: To evaluate the short-term clinical-functional and radiographic outcomes in patients with femoral neck fractures undergoing total hip arthroplasty (THA) with Trabecular Titanium™ acetabular cup implants.

Methods: The study included 104 patients with medial femoral neck fractures who underwent THA between January 2020 and December 2020 with the Delta TT acetabular cup (Lima Corporate, Villanova di San Daniele del Friuli, Italy). The mean age of the patients was 69.57 ± 10.16 years (range: 36-85 years). The follow-up period ranged from a minimum of 3 to a maximum of 4 years. Three questionnaires (Harris Hip Score, Oxford Hip Score, and EQ5D) were administered along with radiographic evaluations. Statistical methods included the Student's t-test and one-way analysis of variance for comparisons (with significance set at 0.05), and the Kaplan-Meier curve for prosthetic implant survival.

Results: The mean follow-up was 41.5 months. The Harris Hip Score (HHS) showed a mean increase of 2.74 points (mean HHS 88.52 at 6 months postoperatively and mean HHS 91.26 at the last follow-up) with statistical significance. Similarly, the Oxford Hip Score demonstrated a statistically significant difference between follow-up groups. However, the EQ5D did not show statistically significant differences among the three groups (preoperative, 6-month follow-up, and last follow-up). Revision surgery was required in 6 patients. According to Moore's criteria, 96% of the acetabular components were radiographically stable and well-integrated at the last follow-up. The Kaplan-Meier curve showed a 96% survival rate.

Conclusion: The clinical and radiographic results obtained in the short to medium term confirm the excellent performance of the Delta TT acetabular cup in terms of osseointegration, providing an optimal solution both for young patients with high functional recovery demands and for fragile patients requiring optimal stability of the acetabular component to reduce the risk of implant failure.