Reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening
Abstract The timing of fixator removal in distraction osteogenesis is an important decision. Bipedal weight bearing may not be an accurate estimate of body weight distribution on both limbs. The purpose of this study was to test the reliability of the Single leg stance test (SLST) as an indicator of...
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Nature Portfolio
2025-08-01
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| author | Mahmoud El-Rosasy Osama Elgebaly Amr Elrosasy Abdullah Khaled |
| author_facet | Mahmoud El-Rosasy Osama Elgebaly Amr Elrosasy Abdullah Khaled |
| author_sort | Mahmoud El-Rosasy |
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| description | Abstract The timing of fixator removal in distraction osteogenesis is an important decision. Bipedal weight bearing may not be an accurate estimate of body weight distribution on both limbs. The purpose of this study was to test the reliability of the Single leg stance test (SLST) as an indicator of regenerate bone maturation and safe removal of the external fixator. Patients who underwent Ilizarov limb reconstruction for tibial bone lengthening were classified into two groups. The decision to remove the external fixator was based on radiological analysis and Bipedal walking in group A versus SLST in Group B. to be included in the study, the patient should be able to communicate, perform the test on the healthy limb, have no neuromuscular, visual or vestibular disorders, can do bipedal weight bearing unsupported and plain radiographs show at least three intact cortices. The data was collected retrospectively from 2012 to 2015 in group A and prospectively from 2016 to 2022 in group B. Interpretation of the test was done by two experienced surgeons in limb reconstruction and a junior orthopedic surgeon. A total of 50 patients and 52 patients were included in group A and B respectively. The inter-observer reliability of the three observers was almost perfect. Refracture after external fixator removal occurred in five cases in group A (10%) and one case in group B (1.9%). The SLST was able to predict regenerate maturation in 98% of cases in our series.The SLST is a simple, reproducible, and reliable clinical test that can be used to evaluate the maturation of the regenerate. |
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| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
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| spelling | doaj-art-d6279a3fc39e471c9b2d3be77efffb8e2025-08-20T03:47:07ZengNature PortfolioScientific Reports2045-23222025-08-011511810.1038/s41598-025-14584-xReliability of the single leg stance test for safe removal of external fixator after tibial bone lengtheningMahmoud El-Rosasy0Osama Elgebaly1Amr Elrosasy2Abdullah Khaled3Department of Orthopedic Surgery, Faculty of Medicine, Tanta UniversityDepartment of Orthopedic Surgery, Faculty of Medicine, Tanta UniversityCairo universityDepartment of Orthopedic Surgery, Faculty of Medicine, Tanta UniversityAbstract The timing of fixator removal in distraction osteogenesis is an important decision. Bipedal weight bearing may not be an accurate estimate of body weight distribution on both limbs. The purpose of this study was to test the reliability of the Single leg stance test (SLST) as an indicator of regenerate bone maturation and safe removal of the external fixator. Patients who underwent Ilizarov limb reconstruction for tibial bone lengthening were classified into two groups. The decision to remove the external fixator was based on radiological analysis and Bipedal walking in group A versus SLST in Group B. to be included in the study, the patient should be able to communicate, perform the test on the healthy limb, have no neuromuscular, visual or vestibular disorders, can do bipedal weight bearing unsupported and plain radiographs show at least three intact cortices. The data was collected retrospectively from 2012 to 2015 in group A and prospectively from 2016 to 2022 in group B. Interpretation of the test was done by two experienced surgeons in limb reconstruction and a junior orthopedic surgeon. A total of 50 patients and 52 patients were included in group A and B respectively. The inter-observer reliability of the three observers was almost perfect. Refracture after external fixator removal occurred in five cases in group A (10%) and one case in group B (1.9%). The SLST was able to predict regenerate maturation in 98% of cases in our series.The SLST is a simple, reproducible, and reliable clinical test that can be used to evaluate the maturation of the regenerate.https://doi.org/10.1038/s41598-025-14584-xSingle leg stanceTibial lengtheningRegenerateIlizarovBone transport |
| spellingShingle | Mahmoud El-Rosasy Osama Elgebaly Amr Elrosasy Abdullah Khaled Reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening Scientific Reports Single leg stance Tibial lengthening Regenerate Ilizarov Bone transport |
| title | Reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening |
| title_full | Reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening |
| title_fullStr | Reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening |
| title_full_unstemmed | Reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening |
| title_short | Reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening |
| title_sort | reliability of the single leg stance test for safe removal of external fixator after tibial bone lengthening |
| topic | Single leg stance Tibial lengthening Regenerate Ilizarov Bone transport |
| url | https://doi.org/10.1038/s41598-025-14584-x |
| work_keys_str_mv | AT mahmoudelrosasy reliabilityofthesinglelegstancetestforsaferemovalofexternalfixatoraftertibialbonelengthening AT osamaelgebaly reliabilityofthesinglelegstancetestforsaferemovalofexternalfixatoraftertibialbonelengthening AT amrelrosasy reliabilityofthesinglelegstancetestforsaferemovalofexternalfixatoraftertibialbonelengthening AT abdullahkhaled reliabilityofthesinglelegstancetestforsaferemovalofexternalfixatoraftertibialbonelengthening |