Karvonen M, Laaksonen I, Pulkkinen P, et al. - Based on the Finnish Arthroplasty Register data, researchers evaluated implant survival of the constrained acetabular device in primary total hip arthroplasty (THA). In total, 373 primary THAs with constrained acetabular devices inserted from 2006 to 2017 have been involved. Data reported that the 8-year survivorship for any reason was 94% for the constrained device group and 93% for the reference group. Compared with 12 dislocation revisions in the matched reference group, there was only one dislocation revision in the constrained acetabular device group, although the distinction was not statistically significant. The present data indicate that the constrained acetabular device works well in patients undergoing primary THA with high instability risk.