BMC Musculoskeletal Disorders最新文献

{"title":"Correction: Machine learning-based survival models for predicting rehospitalization of older hip fracture patients: a retrospective cohort study.","authors":"Juahn Oh, Minah Park, Yonghan Cha, Jae-Hyun Kim, Seung Hoon Kim","doi":"10.1186/s12891-025-08829-z","DOIUrl":"10.1186/s12891-025-08829-z","url":null,"abstract":"","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"578"},"PeriodicalIF":2.2,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144324522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical and radiological comparison of three different reverse shoulder arthroplasty designs for patients with primary osteoarthritis.","authors":"Jan-Philipp Imiolczyk, Laurent Audigé, Florian Freislederer, Tim Schneller, Yacine Ameziane, Amadeo Touet, Markus Scheibel","doi":"10.1186/s12891-025-08749-y","DOIUrl":"10.1186/s12891-025-08749-y","url":null,"abstract":"<p><strong>Aims: </strong>In reverse shoulder arthroplasty (RSA), different implant designs range from medializing implants to strongly lateralizing onlay designs with different neck-shaft-angles (NSA). Thus different degrees of lateralization are currently used. Aim of this study was to compare clinical and radiological outcomes of three different implant designs in a homogeneous patient cohort with primary osteoarthritis (OA).</p><p><strong>Methods: </strong>Patients with OA who underwent RSA between 03/2014 and 01/2020 were included and categorized into three groups based on RSA design: group MD (medialized-distalized design: eccentric glenosphere, 155° NSA), group L (lateralized design: + 4 mm centric glenosphere, 135° NSA), group LD (lateralized-distalized design: eccentric glenospheres, + 3 mm baseplate, curved onlay stem 145° NSA). Inclusion criteria were complete clinical and radiological 24 months follow-up (FU) including range of motion (ROM), Constant-Murley score (CS), Subjective Shoulder Value (SSV). In addition, scapular notching and adverse events were recorded.</p><p><strong>Results: </strong>Group MD including 26 patients (81% female; mean age: 77.9 years) reached 71 (range: 60-85) points in CS and 90% (range: 40-100) in SSV. In group L, 46 patients (98% female; mean age: 75.2 years) achieved a CS of 75 (59-85) points and SSV was 95% (60-100). In group LD, 25 patients (68% female; mean age: 76.3 years) presented a CS of 79 (30-100) points and SSV of 93% (50-100). Group L and group LD achieved significantly better abduction, internal and external rotation (p < 0.001), forward flexion (p = 0.023) and SSV (p = 0.046). Scapular notching was present in 22% of MD patients (13% grade 1; 4% grade 2; 4% grade 4), 16% in group L (all grade 1) and 9% in group LD (all grade 2). No prosthesis related complication occurred in any group.</p><p><strong>Conclusion: </strong>In patients with primary OA, the lateralized and lateralized-distalized designs result in superior subjective satisfaction in SSV and improved ROM in all planes compared to the traditional distalized-medialized implant designs. In all three groups, no implant related complications were noted.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"577"},"PeriodicalIF":2.2,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12166633/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144293325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does local steroid injection have a prognostic value for endoscopic plantar fascia release in chronic plantar fasciopathy?","authors":"Mohamed A Mohamed, Mohammed S Redwan, Hassan H Noaman, Moustafa Elsayed","doi":"10.1186/s12891-025-08816-4","DOIUrl":"10.1186/s12891-025-08816-4","url":null,"abstract":"<p><strong>Purpose: </strong>To determine if previous local steroid injection can alter the patient response to endoscopic plantar fascia release.</p><p><strong>Methods: </strong>It is a prospective non-randomized comparative study of 100 adult patients, suffered from plantar fasciopathy for at least one year, and had reported either temporary or no response to two or more of conservative treatments, including local corticosteroid injection. Enrolled patients were non-randomly allocated by convenience sampling into two groups. The first 50 patients who reported improvement in response to local corticosteroid injection were allocated to Group (A) The first 50 patients who did not report any improvement after injection were allocated to group (B) Both groups underwent endoscopic plantar fascia release. Clinical evaluation was carried out using the visual analogue scale (VAS), American Orthopaedic Foot and Ankle-Hindfoot Scale (AOFAS) and Patient self-assessment (Roles and Maudsley score) preoperatively and at 4, 8 weeks, 3, 6, 12, and 24 months postoperatively.</p><p><strong>Results: </strong>Both groups showed a statistically significant improvement in VAS for heel pain, AOFAS score, and Roles and Maudsley score. Group A demonstrated significantly better VAS, AOFAS, and self-assessment scores than group B at different follow-up intervals. Furthermore, trajectory analysis showed faster pain relief and functional recovery was observed in group A compared to group B.</p><p><strong>Conclusion: </strong>Patients who experienced temporary improvement after local corticosteroid injection had better clinical outcomes following endoscopic plantar fascia release.</p><p><strong>Clinical trial number: </strong>Not applicable.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"576"},"PeriodicalIF":2.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12150543/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144257387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative effectiveness of nitinol staple-only fixation versus antiglide plate fixation for Weber type B distal fibular fractures.","authors":"Kensei Yoshimoto, Masahiko Noguchi, Takumi Koseki, Ayako Tominaga, Ken Okazaki","doi":"10.1186/s12891-025-08835-1","DOIUrl":"10.1186/s12891-025-08835-1","url":null,"abstract":"<p><strong>Background: </strong>Interest in less invasive surgeries for Weber type B distal fibular fracture has increased recently. This study aimed to demonstrate that nitinol staple-only fixation is less invasive compared to antiglide plate fixation.</p><p><strong>Materials and methods: </strong>This retrospective review involved 59 patients with Weber type B fibular fractures who underwent surgery between 2018 and 2023. Twenty-eight patients underwent antiglide plate fixation, whereas 31 underwent multiple nitinol staple-only fixation. The intraoperative assessment included skin incision length and operative time. The radiographic outcomes were bone union and fibular length. The clinical outcomes included delayed wound healing, infection, discomfort from the implant, implant removal, and the Self-Administered Foot Evaluation Questionnaire (SAFE-Q) score administered at the last visit.</p><p><strong>Results: </strong>The mean skin incision length and operative time of nitinol staple-only fixation were 3.8 ± 0.5 cm and 19.6 ± 3.6 min, compared with 8.7 ± 1.3 cm and 48.8 ± 10.6 min for plate fixation, respectively. Bone union was confirmed in all patients without fibular shortening. Although no significant differences in patients with delayed wound healing, infection, or postoperative SAFE-Q scores were found between the two groups, more patients with plate fixation reported discomfort from the implant (71.4% vs. 32.3%) and requested its removal (75.0% vs. 35.5%).</p><p><strong>Conclusion: </strong>Multiple nitinol staple-only fixations offer the advantages of a smaller skin incision, shorter operative time, lesser discomfort from the implants, and a reduced need for implant removal compared with antiglide plate fixation. Furthermore, staple-only fixation could achieve bone union without loss of correction. This suggests that multiple nitinol staple-only fixation may be less invasive and more beneficial for patients than antiglide plate fixation.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"572"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144700/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spasm and electromyography intensity of bilateral extensor during relaxation period in trunk anterior flexion-extension performance response to sustained asymmetry spinal loading.","authors":"Longzhen Wang, Jingyuan Wang, Wenjin Wang, Xiangrong Cheng, Wenrong Wang, Xinhai Shan","doi":"10.1186/s12891-025-08772-z","DOIUrl":"10.1186/s12891-025-08772-z","url":null,"abstract":"<p><strong>Background: </strong>The influence of sustained spinal loading on flexion relaxation phenomenon (FRP) in erector spinae (ES) in trunk anterior flexion-extension performance has been studied. However, no investigation has been reported on spasm after the loading. The aim of the study is to test if spasm as well as the increase of electromyography ( EMG) intensity of extensors in relaxation period could be found during and/or after prolonged asymmetric static loading.</p><p><strong>Methods: </strong>Twenty six male healthy college students participated in the study. Participants finished two 30 min asymmetry load conditions (left load(LL), right load (RL)), randomly with total load 10 kg on the left or the right shoulder, respectively. EMG signals were recorded from the left(l) and the right(r) thoracic erector spinae (lTES, rTES), lumbar erector spinae (lLES, rTES), and hamstring (lHAM, rHAM) muscles in the first 10 min and the last 10 min during the interventions, and also recorded in three trunk anterior flexion-extension exertions before (pre) and after (post) the interventions, respectively. The rhythmic of flexion-extension performance was controlled by a metronome with 5 s flexion and 5 s extension at 60 Hz. Spasms were evaluated and an averaged electromyography (NEMG) was calculated for extensors at the first and last 10 min of 30 min intervention, as well as in the relaxation period of FRP during flexion-extension exertion in both pre and post the intervention.</p><p><strong>Results: </strong>During asymmetry spinal loading process, there was no sign of spasms in any of extensors. NEMG of multiple erect spinae had a significant decrease (with the largest -60%, p = 0.021 in rLES in LL) while that of hamstring increases significantly (the largest value 139%, p = 0.001 in lHAM in LL). After the interventions, the prevalence of spasms in extensors in relaxation period was found with the value from 8 to 55%. Also, NEMG in multiple extensors had a significant increase (with the largest increase of 114% in lLES in LL, p = 0.023).</p><p><strong>Conclusion: </strong>During sustained asymmetry spinal loading, the NEMG in bilateral HAM has significant increase and the NEMG in bilateral erect spinea has a decrease tendency. After loading, the NEMG has a significant increase, in parallel with spasms elicited in multiple extensors in relation period in flexion-extension performance, with no significant difference between bilateral sides. It may indicate that sustained asymmetry spinal loading could lead to a weakness for tension ability, and/or a micro-damage in spinal bilateral passive tissues in low back area, the risk of developing low back disorder.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"574"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144801/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of a single session of in-person and remote strength training on low back pain and disability outcomes in pregnant women: a randomized and controlled crossover clinical trial.","authors":"Valéria Jardim Pires, Camila Miranda, Bruna Sacchi Fraga, Yasmin Bortoli Führ, Andressa Martins E Silva, Ana Carolina Kanitz","doi":"10.1186/s12891-025-08544-9","DOIUrl":"10.1186/s12891-025-08544-9","url":null,"abstract":"<p><strong>Background: </strong>The objective of the present study is to evaluate the effects of a single session of in-person and remote strength training on the outcomes of low back pain, functional disability, and enjoyment in pregnant women.</p><p><strong>Methods: </strong>The methodology used was an approved controlled and randomized clinical trial by the Research Ethics Committee and registered in the Brazilian Clinical Trials Registry. The study involved seventeen pregnant women undergoing one in-person strength training session (IS), one remote strength training session (RS), and one control session (CS) in a randomly determined order. The team conducted assessments using questionnaires for low back pain, functional disability, and enjoyment. We compared the Generalized Estimating Equations (GEE) method with a Bonferroni complementary test (α = 0.05) and the Mann-Whitney U test.</p><p><strong>Results: </strong>Reduced values of low back pain were found after the session for the SUM item in the in-person (Δ-2.06), remote (Δ-1.59), and control (Δ-2.17) sessions, as well as for the INTENSITY item in the in-person (Δ-0.23), remote (Δ-0.12), and control (Δ-0.3) sessions. Reductions in disability values 24 h after the session were observed for the remote (Δ-0.76) and control (Δ-1.59) sessions. Additionally, positive enjoyment values were noted after in-person (117) and remote (119) sessions.</p><p><strong>Conclusion: </strong>It is concluded that a strength training session can potentially improve or maintain the acute low back pain and disability scale without causing an increase in low back pain symptoms. Furthermore, it can promote a high level of enjoyment, regardless of whether it is conducted in person or remotely. Health education strategies, such as those proposed by the control session in this study, are also beneficial.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"573"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144786/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk factors for perioperative blood transfusion in total hip arthroplasty: a meta-analysis.","authors":"Chenghuan Peng, Lijuan Qiao","doi":"10.1186/s12891-025-08801-x","DOIUrl":"10.1186/s12891-025-08801-x","url":null,"abstract":"<p><strong>Objective: </strong>The present study assessed and synthesized the potential risk factors for perioperative blood transfusion in total hip arthroplasty from various studies through Meta-analysis.</p><p><strong>Methods: </strong>We systematically searched for relevant studies in databases including Web of Science, PubMed, Embase, and Cochrane Library from the time of database creation to 1 February 2025 and included all observational studies exploring perioperative transfusion risk factors in patients undergoing total hip arthroplasty. All included studies were assessed for quality using the Newcastle-Ottawa Scale (NOS) scale. Data were analyzed using Stata 15 software.</p><p><strong>Results: </strong>A total of 18 articles (n = 424,158) were included, meta-analysis results suggest that increased intraoperative bleeding [OR = 1.13, 95%CI (1.02, 1.24)], increased postoperative drainage [OR = 2.24, 95%CI (1.24, 4.83)], body mass index ≤ 18.5 [OR = 1.10, 95%CI (1.02, 1.20)], preoperative anemia [OR = 1.82, 95%CI (1.62, 2.03)], age ≥ 80 [OR = 1.49 95%CI(1.21, 1.83)], female [OR = 1.92, 95%CI (1.71, 2.15)], ASA class ≥ 3 [OR = 2.06, 95%CI (1.63, 2.61)] in patients with total hip arthroplasty (THA) increases the incidence of perioperative blood transfusion.</p><p><strong>Conclusion: </strong>The results of the current study suggest that increased intraoperative bleeding, increased postoperative drainage, low body mass index (≤ 18.5), preoperative anemia, advanced age (≥ 80 years), female gender, and high ASA classification (≥ 3) were significantly associated with the likelihood of needing blood transfusion. These findings highlight the importance of preoperative risk assessment and perioperative management strategies to reduce the need for blood transfusion and improve patient outcomes.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"569"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144750/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Knotless versus knotted arthroscopic Bankart repairs for anterior shoulder instability: a systematic review and meta-analysis.","authors":"Cheng Wang, Yanhang Liu, Meng Ding, Sha Wan, Kefu Lin, Zhen Tian, Lang Li","doi":"10.1186/s12891-025-08832-4","DOIUrl":"10.1186/s12891-025-08832-4","url":null,"abstract":"<p><strong>Background: </strong>Arthroscopic Bankart repair can be performed via a more contemporary knotless procedure or a more traditional knotted procedure. Nonetheless, comparisons between these two techniques remain controversial.</p><p><strong>Methods: </strong>Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a comprehensive search of PubMed, EMBASE, Cochrane Library, Scopus, and Web of Science was conducted. Randomized controlled trials (RCTs) and cohort studies directly comparing the knotless and knotted arthroscopic Bankart procedures were included. The primary outcomes were rates of recurrent instability and revision surgeries. Secondary outcomes encompassed number of anchors, operative time, improvements in functional scores including Rowe score and Constant-Murley score (CMS), pain level assessed by the visual analogue scale (VAS) score, range of motion (ROM), adverse events, and radiological results. Quality assessment was performed using RoB2 and MINORS tools. Meta-analysis pooled RCT data using Review Manager 5.4.1, and non-pooled outcomes from cohort studies or limited RCT data were reported separately.</p><p><strong>Results: </strong>This meta-analysis included nine studies with a total of 729 patients. Pooled data from three RCTs demonstrated no significant differences between the two techniques in terms of re-dislocation (P = 0.78), recurrent anterior subluxation and positive apprehension test (P = 0.78), revision surgery (P = 0.94), number of anchors used (P = 0.26), or improvements in Rowe score (P = 0.15). For outcomes not suitable for pooling, qualitative analysis of trends indicated comparable outcomes between the groups, except a slightly reduced operative time in the knotless repair group. Adverse events were infrequently reported and occurred at similar rates in both groups. Limited radiological data from one RCT showed no significant differences in MRI parameters at the 24-month follow-up.</p><p><strong>Conclusion: </strong>Both techniques demonstrate comparable clinical outcomes. The only potential advantage of the knotless technique is a possible reduction in operative time, though its clinical significance remains uncertain. Given the limitations of the evidence, these findings should be interpreted cautiously.</p><p><strong>Clinical trial number: </strong>Not applicable.</p><p><strong>Prospero registration id: </strong>CRD42024586135.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"571"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144794/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomechanical comparison of a novel triangular fixation stem and a conventional fixation stem in a model of a prosthesis for ultrashort residual proximal femur reconstruction: a finite element analysis study.","authors":"Zi-Wei Hou, Kai Zheng, Xiu-Chun Yu","doi":"10.1186/s12891-025-08805-7","DOIUrl":"10.1186/s12891-025-08805-7","url":null,"abstract":"<p><strong>Background: </strong>Reconstruction using a megaprosthesis is the primary method for treating long segmental bone tumors in the extremities following resection. However, conventional stem (CS) prostheses fail to provide stable fixation in the metaphysis. To improve prosthetic fixation in the proximal femoral metaphysis, in a previous study, we proposed a novel triangular fixation stem (TFS) design. The purpose of the present study was to use the finite element analysis (FEA) method to compare biomechanical properties of models of the TFS and CS prostheses for ultrashort residual proximal femur (URPF) reconstructions.</p><p><strong>Methods: </strong>FEA was performed using a commercially-available software package and a Sawbones femur model subjected to a static load of 2800 N. This load simulated the weight of an adult weighing 70 kg doing a squat. The parameters determined were von Mises stress distribution, maximum von Mises stress, displacement distribution, and maximum displacement in different parts of the model, such as the femur and the prosthesis.</p><p><strong>Results: </strong>The TFS prosthesis exhibited a more even von Mises stress distribution stress compared to the CS prosthesis. The maximum von Mises stresses on the prosthetic stem surface were 68.99 MPa and 85.91 MPa for the TFS and CS models, respectively. In the TFS model, the maximum von Mises stresses in the lateral plate and the screws were 115.28 MPa and 122.25 MPa, respectively. Regarding von Mises stresses distribution in the femur, the TFS model showed 26.80 MPa and 34.71 medially and laterally, respectively, whereas the CS model displayed 34.21 MPa and 20.36 medially and laterally, respectively. In the TFS model, maximum displacements were 0.51 mm in the femur and 0.18 mm in the prosthesis, with the corresponding values in the CS model being 0.71 mm and 0.30 mm, respectively.</p><p><strong>Conclusion: </strong>The von Mises stress distribution of the model containing the TFS prosthesis is more even than that containing the CS prosthesis. Thus, the TFS prosthesis may be promising for use as prosthetic implantation in the reconstruction of a URPF.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"570"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144756/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomechanical evaluation of femoral neck system versus non-sliding fixation in the treatment of young patients with Pauwels type III femoral neck fractures: a finite element analysis.","authors":"Yang Gao, Zhiyuan Lou, Peng Jia, Xiaohu Chang, Xiaoteng Li, Xin Tang","doi":"10.1186/s12891-025-08761-2","DOIUrl":"10.1186/s12891-025-08761-2","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to compare the biomechanical performance of the femoral neck system (FNS) and four cannulated screws (FCS) on treating young patients with Pauwels type III femoral neck fractures.</p><p><strong>Methods: </strong>The model of a young Pauwels type III femoral neck fracture with 70° inclination, FNS, and FCS were established, and the fixations were set up. Under an axial load of 2100 N, the finite element anaysis was performed, and the shear force distribution, von Mises stress (VMS), and displacement of each group of models were recorded to analyze the biomechanical effects.</p><p><strong>Results: </strong>The FNS group exhibited localized shear stress, with a peak value of 181.96 MPa, whereas the FCS group displayed a more dispersed shear stress distribution. In the FCS group, the maximum shear stress values were 71.21 MPa, 66.65 MPa, 59.22 MPa, and 84.23 MPa for the upper anterior parallel, upper posterior parallel, transverse, and lower parallel screws, respectively. The maximum shear stress observed in the femur were 113.98 MPa in the FNS group and 89.39 MPa in the FCS group. VMS in the FNS group was predominantly concentrated at the plate-screw junction, reaching a peak of 326.24 MPa, whereas in the FCS group, it was primarily localized near the fracture site in the mid-screw region, with a maximum value of 166.77 MPa. In the femur, VMS was concentrated at the stress application site on the femoral head, with peak values of 197.54 MPa and 154.85 MPa in the FNS and FCS groups, respectively. The greatest displacement of the internal fixators was observed at the screw heads and the two upper parallel screws, measuring 3.36 mm in the FNS group and 3.28 mm in the FCS group. The maximum displacement of the femur occurred at the stress application site on the femoral head, measuring 3.41 mm and 3.33 mm in the FNS and FCS groups, respectively.</p><p><strong>Conclusion: </strong>Comparative finite element analysis demonstrates superior biomechanical stability of FCS over FNS, indicating its greater suitability for managing young Pauwels type III femoral neck fractures.</p><p><strong>Clinical trial number: </strong>Not applicable.</p>","PeriodicalId":9189,"journal":{"name":"BMC Musculoskeletal Disorders","volume":"26 1","pages":"575"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144777/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}