THREE-DIMENSIONAL FEA OF FIXTURE DIAMETER INFLUENCE ON ABUTMENT AND SCREW IN ANTERIOR MAXILLA BRIDGES

Beni Aji Subekti (Semarang State University)
Kriswanto (Semarang State University)
Febri Budi Darsono (Semarang State University)
Rahmat Doni Widodo (Semarang State University)
J. Jamari (Diponegoro University)
Athanasius Priharyoto Bayuseno (Diponegoro University)

Jurnal Pendidikan Teknik Mesin
Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"

Numerical simulation-based biomechanical evaluation was used to analyze the effect of implant diameter variation on stress and strain on the abutment and screw using the Finite Element Method (FEM). Modeling was performed based on CBCT data and simulated in ANSYS Workbench 2023 R1. Three implant diameters were tested (3.75 mm, 4.3 mm, and 5.0 mm), each subjected to a force of 204.1 N at a 45° angle to mimic anterior functional conditions. The 4.3 mm diameter produced the highest stress on the abutment (213.62 MPa), while the 5.0 mm diameter showed the lowest stress (192.5 MPa) and minimum strain (0.00178). The 5.0 mm diameter also reduced the load on the screw, indicating a more stable load distribution. Therefore, this diameter is recommended as the optimal biomechanical configuration for anterior implant bridges, while considering anatomical limitations.