Akademik Veri Yönetim Sistemi
JOURNAL OF HIP PRESERVATION SURGERY, 2026 (SCI-Expanded)
This study aims to compare the biomechanical stability of different screw and plate configurations used in the fixation of acetabular fragments after periacetabular osteotomy (PAO). A total of 42 synthetic hemipelvis models were categorized into six fixation groups: three iliac screws (3 V), four iliac screws (4 V), three screws + lateral compression (LC) screw (3 V + LC), locking three-screw plate (3P), plate + LC screw (3P + LC), and eight-screw plate (4P). All samples were evaluated for stiffness under a constant load of 700 N and for stiffness under maximum load. The greatest failure load was observed in the 3 V group (1249.4 N), whereas the 3P group demonstrated the lowest (658.5 N). In terms of maximum force, both the 3 V and 4 V groups were significantly superior to the 3P (P = .003 and P = .018, respectively) and 3P + LC (P = .006 and P = .021, respectively) groups. Although the 4P configuration showed the highest fracture stiffness (155.1 N/mm), this did not differ significantly among groups. Stiffness at a constant load of 700 N, the 3 V and 3 V + LC groups demonstrated higher stiffness than the 3P and 3P + LC groups, with comparisons to the 3P group approaching statistical significance (P = .064 and P = .063, respectively). Traditional iliac screw structures (especially 3 V and 4 V) provide effective fixation in terms of load-bearing and stiffness, while plate-based systems require a high number of screws and optimal placement to provide adequate stability. Although the LC screw increases stiffness, it provides only a limited contribution to breaking strength.