Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study
Abstract Background Several 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...
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BMC
2025-07-01
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| Series: | Journal of Orthopaedic Surgery and Research |
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| Online Access: | https://doi.org/10.1186/s13018-025-06082-7 |
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| author | Titus Thut Marco Rohner Christoph Kellner Naeder Helmy Christian von Deimling |
| author_facet | Titus Thut Marco Rohner Christoph Kellner Naeder Helmy Christian von Deimling |
| author_sort | Titus Thut |
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| description | Abstract Background Several 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. Methods In 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 analy Results We 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. Conclusions The 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 registration This prospective study was approved by the ethics commission board of northwest and central Switzerland (BASEC Nr 2023 − 00375). |
| format | Article |
| id | doaj-art-b04aca8155e04cac8e4fbe5736c25daa |
| institution | Kabale University |
| issn | 1749-799X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Orthopaedic Surgery and Research |
| spelling | doaj-art-b04aca8155e04cac8e4fbe5736c25daa2025-08-20T04:03:01ZengBMCJournal of Orthopaedic Surgery and Research1749-799X2025-07-012011810.1186/s13018-025-06082-7Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up studyTitus Thut0Marco Rohner1Christoph Kellner2Naeder Helmy3Christian von Deimling4Department of Orthopedic Surgery and Traumatology, Bürgerspital SolothurnDepartment of Orthopedic Surgery and Traumatology, Bürgerspital SolothurnDepartment of Orthopedic Surgery and Traumatology, Bürgerspital SolothurnDepartment of Orthopedic Surgery and Traumatology, Bürgerspital SolothurnDepartment of Orthopedic Surgery and Traumatology, Bürgerspital SolothurnAbstract Background Several 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. Methods In 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 analy Results We 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. Conclusions The 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 registration This prospective study was approved by the ethics commission board of northwest and central Switzerland (BASEC Nr 2023 − 00375).https://doi.org/10.1186/s13018-025-06082-7SubsidenceOptimysShort-stemEBRAUncementedTotal hip arthroplasty |
| spellingShingle | Titus Thut Marco Rohner Christoph Kellner Naeder Helmy Christian von Deimling Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study Journal of Orthopaedic Surgery and Research Subsidence Optimys Short-stem EBRA Uncemented Total hip arthroplasty |
| title | Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study |
| title_full | Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study |
| title_fullStr | Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study |
| title_full_unstemmed | Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study |
| title_short | Subsidence rate and long-term outcome of a calcar-guided short stem: a prospective 10-year follow-up study |
| title_sort | subsidence rate and long term outcome of a calcar guided short stem a prospective 10 year follow up study |
| topic | Subsidence Optimys Short-stem EBRA Uncemented Total hip arthroplasty |
| url | https://doi.org/10.1186/s13018-025-06082-7 |
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