Akademik Veri Yönetim Sistemi
Clinical Dentistry and Research, cilt.49, sa.2, ss.64-70, 2025 (TRDizin)
Background and Aims: The present finite element analysis (FEA) was performed to determine whether one–piece patient specific implants (PSI) are superior to two–piece implants in terms of the distribution of occlusal forces and limiting translocation during the healing period of LeFort I surgery. Materials and Methods: The models were generated for 5 mm advancement, 5 mm setback, 5 mm impaction, and 5 mm downward positioning of the maxilla, following contact analysis of the screws, cortical bone, and cancellous bone. One– and two–piece PSIs were inserted into the aforementioned four models, and a vertical force of 98 N was applied bilaterally to the premolar and molar teeth. The von Mises stress was evaluated for the PSIs, screws, and adjacent bones. Translocation amounts and patterns were evaluated for the maxillary components of the models. Results: The maximum von Mises stresses of one–piece PSIs for the advancement, setback, downward positioning, and impaction models were 233 MPa, 248 MPa, 263 MPa, and 260 MPa, respectively. The maximum von Mises stresses of two–piece PSIs for the advancement, setback, downward positioning, and impaction models were 248 MPa, 256 MPa, 250 MPa, and 270 MPa, respectively. Conclusions: The stress distribution on the PSIs did not differ between the one-piece and two–piece PSIs for all movement models. Two–piece PSIs can be preferred over one–piece PSIs for increased adaptability without loss in strength.