Rifky Ismail, Deni Fajar Fitriyana, Athanasius Priharyoto Bayuseno, Baharudin Priwintoko, Yusuf Subagyo, Muhammad Afrizal, Jamari Jamari, Januar Parlaungan Siregar, Tezara Cionita, Jamiluddin Jaafar
The Interference screws are one type of device that is often used in ACL reconstruction surgery. These devices are made of strong materials such as titanium or bioabsorbable materials. However, the use of PMMA (polymethyl methacrylate) as a material for the production of interference screws has not been widely explored. PMMA is commonly used in biomedical applications such as orthopedics and bone tissue engineering. Therefore, the aim of this study was to assess the structural integrity and performance characteristics of PMMA-based interference screws fabricated by utilizing three-dimensional (3D) printing techniques. The interference screw fabrication was carried out by adjusting the nozzle temperature, bed temperature, and print speed on the 3D printing machine to 240oC, 100oC, and 30 mm/s, respectively. The tests conducted in this study include torque, density, and fracture surface analysis. This study found that the density of the PMMA and commercial interference screws met the density requirements for cortical bone. However, the PMMA interference screw had a lower density than the commercial interference screw. The PMMA and commercial interference screws had densities (g/cm3) of 1.10 and 1.31, respectively. The mechanical properties of interference screws increase with increasing density. The PMMA interference screw achieved only 41% of the PFT (peak failure torque) exhibited by the commercial interference screw. In addition, the PMMA interference screw only meets the clamping criteria, while the commercial interference screw has met the good clamping criteria. The results of surface fracture analysis showed that the PMMA and commercial interference screws had ductile and brittle properties. © 2025, Semarak Ilmu Publishing. All rights reserved.
Department of Mechanical Engineering, Faculty of Engineering, Diponegoro University, Jawa Tengah, Semarang, 50275, Indonesia; Department of Mechanical Engineering, Universitas Negeri Semarang, Kampus Sekaran, Gunungpati, Semarang, 50229, Indonesia; Faculty of Mechanical and Automotive Engineering Technology, Universiti of Malaysia Pahang Al-Sultan Abdullah (UMPSA), Pahang, Gambang, 26300, Malaysia; Faculty of Engineering and Quantity Surveying, INTI International University, Negeri Sembilan, Nilai, 71800, Malaysia; Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Johor, Parit Raja, 86400, Malaysia
