Description according to PICOS framework:~Patients:~- Adult men and women requiring a primary total hip arthroplasty~Intervention:~- Primary THA with SYMBOL CUP DM HA hemispherical dual mobility acetabular implant.~Comparator: None~Outcomes:~Safety 1: Implant survival over 2-year follow-up.~Safety 2: All adverse events, with focus on implant dislocation, infections, revision surgery~Efficacy 1: Harris Hip Score (HHS) at baseline and 1-year follow-up.~Efficacy 2: Modified HHS consisting of pain + functional subscores at baseline, 1-year and 2-year follow-ups.~Efficacy 2: Devane score at baseline, 1-year and 2-year follow-ups.~Efficacy 3: Charnley classification at baseline, 1-year and 2-year follow-ups.~Study design:~single-center retrospective observational cohort study of consecutively operated patients who underwent primary total hip arthroplasty 2 years prior to study start.~Prospective 2-year follow-up letter and phone questionnaire.
This is a single-center retrospective observational cohort study of consecutively operated patients who underwent primary total hip arthroplasty with a SYMBOL CUP DM HA hemispherical dual mobility acetabular implant. The purpose of this study is to estimate the safety and efficacy of that implant at two-year follow-up.