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ABSTRACT
Anterior cruciate ligament (ACL) reconstruction frequently employs the bioabsorbable interference screw, which is 3D printed with biocomposite filaments. The purpose of this research was to construct interference screws using 3D printing filaments (HA, PLA, and PCL) at different nozzle temperatures. In this experiment, nozzle temperatures of 190, 195, 200, and 205°C were used. Density tests, torsion tests, fracture analysis, and biodegradable tests were also used to characterize interference screws. A simple finite element model (FEM) of tibial screw fixation in hamstring ACL reconstruction was also presented. The interference screw was also compared to a commercial one. Within the maximum and minimum values of cortical bone density, the density of the interference screw prepared in this study is the best fit for implants. The current model can predict stress in tunnel wall regions caused by screw fixation. However, the clamping quality of the commercial screw in the clamping failure area for torque efficiency was better than that of the interference screw produced in this study. Commercial interference screws deteriorated the most quickly. The method has shown the ability to manufacture interference screw components with improved biodegradability.
Acknowledgment
The authors would like to express their gratitude to the Faculty of Engineering at Diponegoro University in Indonesia for providing financial support through the Strategic Research Grant 2022 under contract No. 3178/S/mesin and 1/UN7.5.3.2/PP/2022 under Directorate of Research and Community Services (DRPM), Indonesian Ministry of Education, Culture, Research, and Technology for PDUPT Research Grant in the Year of 2022.
Disclosure statement
No potential conflict of interest was reported by the author(s).