Modular tapered stems show strong results after hip revision surgery, with no implant breakage reported in the study.
In this article, we explore the outcomes of a large-scale retrospective study that assessed implant survivorship and complications related to modular fluted tapered (MFT) stems used in revision total hip arthroplasty.
The full results are available in the publication "Implant breakage and revision factors for modular fluted tapered stems in revision total hip arthroplasty". For more detailed data and surgical implications, we recommend consulting the full scientific article.
Modular fluted tapered stems are commonly used in revision hip arthroplasty for their ability to achieve stable diaphyseal fixation and restore femoral anatomy. However, some publications have raised concerns regarding metaphyseal implant breakage, a complication known to compromise implant longevity and patient outcomes.
The study in question retrospectively examined 316 patients who underwent revision total hip arthroplasty between 2012 and 2017, all using the same MFT design: the Modular Revision Stem (MRS, Lima Corporate, Italy). The population was representative of typical revision cases, with an average age of 74 and an even distribution of males and females. Indications included:
The average follow-up period was 5 years, with a subset of patients followed for up to 8 years.
The most striking outcome was the complete absence of implant breakage over the study period, challenging prior reports in the literature. At 5 years:
By the 8-year follow-up, survivorship dropped slightly to 92% (aseptic loosening) and 71% (any cause). Importantly, a hazard ratio of 3.7 was found for revision risk when extreme metaphyseal stem lengths were used, suggesting that stem junction placement remains a critical factor in long-term success.
Subsidence (gradual sinking of the stem) was observed in 37 cases, with an average of 9 mm, but only four of these required reintervention.
The Harris Hip Score (a clinical measure of hip function) reached a mean of 82 at final follow-up, indicating a satisfactory quality of life for most patients.
These results are encouraging for both surgeons and patients considering uncemented modular stems for complex hip revisions. The absence of implant breakage after up to 8 years suggests a high level of mechanical reliability. However, the study also underscores the importance of correct junction placement and avoiding extreme metaphyseal lengths to reduce the risk of failure.
To explore the full dataset, statistical analysis, and surgical techniques involved, we invite you to consult the complete article: "Implant breakage and revision factors for modular fluted tapered stems in revision total hip arthroplasty".
If you found this study insightful, we encourage you to read the other scientific publications from Professor Etienne Cavaignac.
For expert care and advice on revision hip or knee surgery, Professor Cavaignac remains a trusted reference. His extensive experience and commitment to research ensure patients receive the highest standard of care.
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