ArticleJournal of the American Academy of Orthopaedic Surgeons. Global research & reviews2025
Hinge-Knee Megaprostheses Components Wear and Corrode: A Retrospective Study of 40 Devices.
Article in Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews, 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
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionHinge-knee megaprostheses are frequently used in complex revision surgeries and are known to have higher complication and revision rates than primary total knee arthroplasties. However, the in vivo damage to the metal and polymer components of megaprostheses remains poorly understood. We, therefore, investigated the damage modes, their severity, and how they varied by implant manufacturer.
methodForty megaprostheses and associated clinical data were collected from an institutional review board-exempt retrieval program, including implants from three manufacturers. We semiquantitatively scored the in vivo damage modes on polymer and metal megaprostheses components using the Kahlenberg method. The Goldberg score was used to classify corrosion for metal-on-metal interfaces. We then analyzed the differences between damage types and device manufacturers using nonparametric statistics.
resultsWe identified and classified scratching, pitting, and burnishing as major damage modes on polyethylene inserts and abrasion, delamination, surface deformation, and embedded debris as minor damage modes. Minor damage modes markedly differed between implant cohorts (P < 0.001), whereas major damage modes did not (P > 0.05). On metal components, scratching was more prevalent than burnishing and discoloration (P < 0.001). Damage to metal tibial components differed by manufacturer (P < 0.01) and corrosion was present in varying degrees across cohorts.
conclusionIn vivo damage occurred on both metal and polyethylene megaprostheses components. Within modular taper junctions, mechanics combined with chemically based processes generated corrosion. We found minimal differences between manufacturers, except for minor polyethylene damage and tibial component damage. The rotating hinge may release metal debris when unprotected by a polyethylene bumper evidenced by burnishing.
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.