Novel monoblock, titanium fluted tapered stem provided excellent outcomes, fixation in THA
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Key takeaways:
- A monoblock titanium fluted tapered stem yielded reliable fixation and excellent outcome score improvements for complex and revision hip arthroplasties.
- Monoblock stems may supplant the use of modular stems.
According to published results, a novel monoblock, titanium fluted tapered stem yielded reliable fixation and excellent clinical outcomes for patients who underwent a variety of complex and revision total hip arthroplasties.
Yousef Alqahtani, MD, and colleagues at Western University and London Health Sciences Centre retrospectively analyzed data from 26 patients who received a novel monoblock, titanium fluted tapered stem (Redapt, Smith & Nephew) for a complex THA due to failed fracture fixation and 100 patients who received the same stem for revision THA.
At a mean 3.9 years of follow-up, researchers found the patients had significant improvements in clinical outcome scores from preoperative to postoperative values. Harris Hip Score improved from 38.76 to 83.42; WOMAC improved from 45.6 to 69.9; Veterans RAND 12-item (VR-12) physical component score improved from 31.7 to 37.8; and VR-12 mental component score improved from 48.2 to 51.6.
In addition, researchers found 3.9% of patients had grade 1 femoral bone loss; 35.7% of patients had grade 2 femoral bone loss; 47.6% had grade 3A femoral bone loss; 11.1% had grade 3B femoral bone loss; and 1.6% of patients had grade 4 femoral bone loss, according to the Paprosky grading scale.
According to the study, 18 patients (14.7%) required reoperation for periprosthetic joint infection (n = 13), instability (n = 4) and acetabular aseptic loosening (n = 1). Researchers noted there were no aseptic failures of the stems.
“As a result, this monoblock titanium fluted tapered stem, even in the setting of more complex defects, has increasingly supplanted the use of modular titanium fluted tapered stems in our institution,” the researchers wrote in the study.
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