ArticleArthroplasty today2025
Highly Porous Tantalum Acetabular Components Without Ancillary Screws Are Non-inferior at 7 Years When Compared With Titanium Components With Ancillary Screw Fixation: A Randomized Controlled Trial.
Article in Arthroplasty today, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: While porous tantalum components have shown to be advantageous in the revision setting, registry studies have identified tantalum components used in primary total hip arthroplasty (THA) to be associated with an increased risk of revision. The only study to examine the migration of tantalum acetabular components with radiostereometric analysis (RSA) beyond 2 years found continued migration. The aim of this 7-year follow-up RSA study was to determine if the mid-term migration of tantalum acetabular components without ancillary screw fixation is no greater than that of fiber metal titanium components with one ancillary screw fixation. Methods: We prospectively reviewed the mid-term implant stability of patients who underwent primary THA and were randomized intra-operatively to receive either the tantalum or titanium acetabular component. Of the initial 66 patients enrolled, 51 (77.3%) were available at 7-year follow-up; 2 tantalum components were revised due to recurrent dislocation and infection, respectively, and 2 titanium components underwent open reduction internal fixation to treat femoral periprosthetic fracture. Acetabular component migration relative to the surrounding acetabular bone was measured using RSA at 4-6 days post-operatively and at 6 weeks, 3 months, 1, 2, 3, 5, and 7 years following THA. Results: At 7 years, the mean proximal migration of tantalum components was 0.22 mm (95% confidence interval 0.08-0.35) and non-inferior to that of titanium components at 0.19 mm (95% confidence interval 0.07-0.32). In addition, the mean proximal migration of tantalum components was non-inferior to that of titanium at both 3 and 5 years. There were no significant differences noted between cohorts for any other axis of translation and rotation. Conclusions: The continued mid-term stability of tantalum acetabular components without ancillary screw fixation is encouraging for long-term stability. The non-inferiority compared to titanium acetabular components with established excellent long-term survivorship provides reassurance to the operative surgeon using tantalum components in the primary setting. Level of Evidence: I.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.