Ahmet Mert, MD, Oğuz Kaya, MD, Kadir Eren Biçer, MD, Halil İbrahim Öçalan, MD. Hip Pelvis 2025;37:314-20. https://doi.org/10.5371/hp.2025.37.4.314

Introduction: Acetabular erosion is a significant, late-stage complication in patients undergoing hemiarthroplasty. This study aimed to investigate the risk factors for acetabular erosion in patients undergoing bipolar hemiarthroplasty for proximal femoral fractures. Methods: This single-center retrospective study was performed on 126 patients aged between 55-85 years who underwent bipolar hemiarthroplasty for proximal femoral fractures between January 2017 and November 2023 and had at least 2 years of radiological follow-up. The demographic data, femoral stem type, and bipolar femoral head diameter of patients were recorded. Femoral offset (FO) and leg length discrepancy (LLD) were measured from early postoperative anteroposterior pelvic radiographs. Acetabular erosion was graded based on the Baker classification on final follow-up radiographs. Statistical analyses were performed using the t test, Mann–Whitney U test, chi-square test, and Spearman correlation analysis. Results: The mean age of patients was 78.10 ± 7.66 years. 74.6% were female, and the mean follow-up period was 38.67 ± 12.45 months. According to the Baker classification, 29.4% of patients had grade 0, 42.9% had grade 1, 18.3% had grade 2, and 9.5% had grade 3 erosion. Acetabular erosion was found to be significantly more common in female patients (p = 0.025). An increased risk of acetabular erosion was observed in patients with a femoral head diameter ≤48 mm (p = 0.043; odds ratio = 3.10; 95% confidence interval = 1.00–9.66). A significant correlation was noted between increased follow-up duration and increased degree of acetabular erosion (p = 0.001). No significant correlation was found between age, femoral stem type, LLD, FO discrepancy, osteoporosis grades (T-score), and acetabular erosion. Conclusion: Female sex and a bipolar femoral head diameter ≤48 mm were the main risk factors for the development of acetabular erosion after hemiarthroplasty and should be considered in surgical decision-making.

Omuz Anatomisi ve Biyomekaniği Tamer ERENER Omuz Eklemi Muayenesi ve Klinik Değerlendirilmesi Göker YURDAKUL Omuz Çevresi Kırıkları İbrahim ALTUN Glenohumeral Çıkıklar İbrahim ALTUN Omuz Eklem Patolojilerinde Tanı ve Görüntüleme Abdulaziz TEMİZ Rotator Manşet Yaralanmaları Salih ERGÜN Akromiyoklaviküler Eklem Yaralanmaları Gökhan PEKER Labral Patolojiler Emre ATMACA Omuz İnstabiliteleri Ve Tedavi Yöntemleri Kadir Eren BİÇER Donuk Omuz (Adheziv Kapsülit) Bilgehan TAĞRİKULU Donuk Omuzda Rehabilitasyon Pınar KAYA SUBAŞI Kalsifik Tendinopatiler İsmail YÜKÜNÇ Omuz Artroskopisi Endikasyonları Abdullah İYİGÜN Omuz Artriti Ve Artroplastisi Eren İMAMOĞLU Omuz Bölgesinin Sinir Yaralanmaları Onur Serdar GENÇLER

Background: Anterior cruciate ligament (ACL) injuries are common knee injuries that impair postural stability due to the loss of mechanoreceptors, affecting proprioceptive feedback and sensorimotor control. The aim of our study was to comprehensively investigate the postural stability in non-athletic individuals who had undergone ACL reconstruction (ACLR) and exploring their relationship with patient-reported outcomes. Methods: A total of 58 participants were included in the study, consisting of 29 individuals who underwent ACLR and 29 control group participants matched for age, height, weight, and sex. Static stability (bipodal and single-leg) was assessed using a force plate by evaluating center of pressure (COP) parameters, while dynamic stability was measured with the Y-Balance Test. During tests, the operated limb in the ACL group was compared with the non-dominant lower extremity of the control group. Group comparisons were performed using independent sample t-tests and Mann–Whitney U tests, and within-group analyses were conducted using paired sample t-tests or Wilcoxon tests. Spearman correlation analysis was used, and statistical significance was set at p < 0.05. Results: When comparing bipodal stance scores between the groups, the ACL group exhibited greater anteroposterior amplitude of the COP sway ( p < 0.001). No differences were observed between the operated and non-operated limbs in single-leg stance parameters ( p > 0.05); however, when compared with the control group’s non-dominant limb, the control values were better than the operated limb ( p < 0.05). In the Y-Balance Test, anterior reach and composite scores were significantly lower on the operated limb ( p < 0.05). When compared with the control group, the ACL group demonstrated lower performance in anterior, posterolateral and posteromedial reaches, as well as composite scores ( p < 0.05). No clinically relevant limb-symmetry deficits were observed within the ACL group ( p > 0.05). Conclusion: In non-athletic individuals, limb symmetry was achieved in static postural stability tests post-operatively; however, differences compared to healthy individuals persisted. Postural deficits were more pronounced particularly in single-leg stance and dynamic postural stability tasks. These findings suggest that postural stability deficits in non-athletic populations may persist at least 12 months post-surgery. Trial registration: NCT07210853 retrospectively registered. ( date29/09/2025).