Custom triflange acetabular components in conjunction with dual-mobility liners for extreme acetabular bone loss in revision hip arthroplasty: the first reported case series from South Asia
Restricted accessResearch articleFirst published online March, 2026
Custom triflange acetabular components in conjunction with dual-mobility liners for extreme acetabular bone loss in revision hip arthroplasty: the first reported case series from South Asia
The global demand for primary total hip arthroplasty (THA) and the corresponding demand for revision THA continue to rise. Revision THA in the face of severe acetabular bone loss is challenging, and the custom triflange acetabular component (CTAC) has emerged as a valuable option for the arthroplasty surgeon. Furthermore, dual mobility liners have been advocated as a promising strategy to reduce the risk of dislocation, a common complication in revision THA.
Methods:
This retrospective study of prospectively collected data comprised 15 consecutive patients who underwent revision THA with 3D-printed CTACs and dual mobility liners between January 2020 and March 2023. All patients had either Paprosky type 3B defects or pelvic discontinuity. Functional outcomes were evaluated using the modified Harris Hip Score (mHHS) and pain via the Visual Analogue Scale (VAS). Implant survival and complications are reported.
Results:
At a mean follow-up of 40 months, mean mHHS improved from 30.46 to 83.90 (p < 0.001), and VAS pain scores decreased from 7.0 to 1.9 (p < 0.001). All patients reported favourable outcomes, and no case was complicated by infection, implant loosening, component failure, or revision. Radiographs showed lateralisation of the centre of rotation by about 1 cm in one patient and Brooker class 1 heterotopic ossification in another. However, all patients demonstrated radiographically stable constructs with good osseointegration at final follow-up. Complications included 2 dislocations and 2 transient sciatic nerve palsies (13.3% each). The dislocations were addressed by closed reduction.
Conclusions:
The CTAC is a powerful tool for managing extensive acetabular bone loss in revision THA. Our findings demonstrate promising outcomes with significant functional improvement, pain reduction, and implant stability.
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