ArticleArthroplasty today2020
Excellent midterm survival and functional outcomes of a fully hydroxyapatite-coated cementless stem: first results of a prospective multicenter study.
Article in Arthroplasty today, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
9 citing papers in PubMed, 13 citations in OpenAlex.
- Novel evaluation of bone reaction/growth around full hydroxyapatite-coated stem using digital tomosynthesis imaging: confirmation of very early bone growth around the stem.BMC musculoskeletal disorders · 2025Article
- Performance of Cementless Hip Arthroplasty Stem Types Based on Consolidated Large Registry Data.Arthroplasty today · 2025Article
- Article
- The influence of stem alignment on the bone mineral density around the Polarstem following total hip arthroplasty.Archives of orthopaedic and trauma surgery · 2023Article
- Survival and performance of a dual tapered-wedge fully HA-coated press fit femoral stem.Archives of orthopaedic and trauma surgery · 2023Article
- Fully hydroxyapatite-coated compaction broached and triple-tapered stem may reduce the risk of stress shielding after primary total hip arthroplasty.Archives of orthopaedic and trauma surgery · 2022Article
- The role of hydroxyapatite coating in joint replacement surgery - Key considerations.Journal of clinical orthopaedics and trauma · 2022Review
- New Evaluation Method for Bone Formation around a Fully Hydroxyapatite-Coated Stem Using Digital Tomosynthesis: A Retrospective Cross-Sectional Study.Diagnostics (Basel, Switzerland) · 2021Article
- Use of a Plasma-Sprayed Titanium-Hydroxyapatite Femoral Stem in Hip Arthroplasty in Patients Older than 70 Years. Is Cementless Fixation a Reliable Option in the Elderly?Journal of clinical medicine · 2021Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe Polarstem (Smith & Nephew, Baar, Switzerland) is a tapered straight stem, an implant with an excellent survival rate. Although the most recent annual report of the National Joint Registry in the United Kingdom also reports excellent survivorship for the cementless Polarstem, no prospective studies have been published focusing on both its efficacy and clinical performance. Therefore, the present study was designed to prospectively evaluate its functional and radiographic outcomes at midterm.
methodsThis prospective observational study conducted at 3 independent orthopaedic hospitals was designed to collect data in patients undergoing cementless primary total hip arthroplasty (THA). A total of 225 total hip arthroplasties (75 at each site) were performed. The predominant diagnosis was primary osteoarthritis. Anteroposterior and lateral radiographs were obtained at each follow-up (3 months, and 1, 3, and 5 years). Survivorship and the Harris Hip Score (HHS) and Western Ontario and McMaster Universities Index (WOMAC) were calculated.
resultsSubjects experienced statistically significant improvements from baseline in mean HHS (48.5 to 88.0,
conclusionsA revision rate of the femoral stem for any reason of 0.4%, as well as good clinical results based on HHS and WOMAC scores, was noted at 5-year follow-up. Therefore, safety and efficacy of the cementless Polarstem at midterm follow-up is confirmed.
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