Abstract
Objective The aim of this study was to report complications and outcomes of a cementless total
hip arthroplasty (THA) system with a second-generation selective laser-melted screw
cup (SCSL).
Study Design All THA using the SCSL performed at a single institution between January 2017 and
November 2022 were retrospectively evaluated. Patients with a minimum follow-up period
of 12 months and complete medical records were included and analyzed for radiographic
and clinical outcomes.
Results Thirty THA with SCSL in 23 dogs were included in this study. Complications were observed
in seven hips, comprising two minor and five major complications, with two hips experiencing
two major complications. Among these seven major complications, six were associated
with the femoral implant and one involved cup luxation. Of the 30 THA, 4 were explanted,
while 26 remained in place for a median follow-up of 17.5 months (range, 12–38 months).
Conclusion No cases of late aseptic loosening were observed with SCSL. THA using SCSL helps
reduce cup-associated complications and is appropriate for THA surgery, and the overall
complication rate is comparable with that of other single-implant systems. Nevertheless,
four hips were explanted.
Keywords
dog - cementless - total hip replacement - 3D printing - hip dysplasia
