Assessment of Custom-Made Acetabular Implants for Complex Revision Total Hip Arthroplasty: A Concise Follow-up, at a...

In this study, we evaluated the long-term outcomes of 3D-printed, custom-made acetabular implants (CMAIs), expanding on earlier, mid-term findings. Radiographic assessment focused on implant migration and bone ingrowth, and clinical outcomes included survivorship, complications, the mobility score, and the Oxford Hip Score (OHS). The median follow-up was 7 years (range, 5 to 9 years). Thirty patients of diverse ethnic backgrounds (21 female; median age of 70 years) were included. Implant migration was limited to the first postoperative year (≤5 mm), with negligible displacement thereafter. Bone ingrowth occurred in 27 (90%) of the patients. The 9-year implant survival rate was 96.3%, with 1 re-revision for infection. The median OHS improved from 8 preoperatively (interquartile range [IQR], 4 to 13) to 32 (IQR, 21 to 37) at the previous, mid-term follow-up (p < 0.0001), and then remained essentially the same at the most recent follow-up. Mobility scores improved by a mean of 1.4 points (p < 0.0001). Two dislocations (in 1 patient), 1 transient sciatic nerve palsy, and recurrent infection in 2 patients were recorded. CMAIs provide durable fixation. Constructs stabilize over time, reflecting osseointegration.

Therapeutic Level IV . See Instructions for Authors for a complete description of levels of evidence.