ArticleJournal of orthopaedic surgery and research2025
Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study.
Article in Journal of orthopaedic surgery and research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Preoperative factors associated with alignment change from planned metaphyseal- to diaphyseal-dominant fixation in calcar-guided short-stem total hip arthroplasty.International orthopaedics · 2026Article
- Early-term clinical and radiographic outcomes of a new short cementless stem for primary total hip arthroplasty in young and active patients.Journal of experimental orthopaedics · 2026Article
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5 authors.
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Abstract
backgroundSeveral studies have reported good to excellent mid-term outcomes for various types of calcar-guided or metaphyseal-anchoring short stems. In our current long-term study, we investigated the subsidence rate of the optimys stem at 10-year follow, correlated the data with clinical outcome and identified potential risk-factors for failure.
methodsIn our cohort we included 41 patients with 43 hips with an average age of 62.5 years and a minimum follow-up of ten years. Ein-Bild-Roentgen-Analyse (EBRA) was used to detect potential subsidence. Clinical outcome and complication rate were analyzed.
resultsWe found an average subsidence of 0.66 mm (SD 0.60) at 3 months, 0.92 (SD 0.88) at 12, 1.5 (SD 1.19) at 60 and 1.8 (SD 1.47) at 120 months respectively. We identified increased femoral offset (2.19 mm vs. 0.90 p = 0.0099) and head size (28, 0.34 mm vs. 32 1.48 Vs. 36 2.50, p = 0.0052), as well as gender (female 1.21 mm vs. male 2.35, p = 0.0067) as risk factors for increased subsidence. The amount of subsidence did not impact clinical outcome.
conclusionsThe evaluated calcar-guided short stem shows an average subsidence of 1.8 mm at 10-year follow up, with most pronounced subsidence within the first 3 months and stabilizing thereafter. In our study male gender and offset seem to be more susceptible to pronounced subsidence whereas this did not correlate with revision rate or inferior clinical outcome in terms of Harris Hip Score (HHS), patient satisfaction and pain.
trial registrationThis prospective study was approved by the ethics commission board of northwest and central Switzerland (BASEC Nr 2023 − 00375).
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