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All Journal Mechanical Engineering for Society and Industry
Athanasius Priharyoto Bayuseno
Universitas Diponegoro, Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Effect of sintering temperature and polyvinyl alcohol composition as binder on the formation of porous hydroxyapatite as bone graft using sponge replication method: A review Baharudin Priwintoko; Rifky Ismail; Deni Fajar Fitriyana; Yusuf Subagyo; Athanasius Priharyoto Bayuseno
Mechanical Engineering for Society and Industry Vol 3 No 3 (2023): Special Issue on Technology Update 2023
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.10397

Abstract

Hydroxyapatite (HA) is one of the inorganic components that has a role as a bone regeneration material. The potential for utilizing waste is one of the opportunities in HA commodities. Several waste materials that can be used as raw materials for HA include egg shells, beef bones, fish bones, limestone, and marine biota shells. Nowadays, the use of HA is not only limited to regeneration materials but also as a bone tissue scaffold. Porous HA is a form of HA that is in great demand today because it can be a good scaffold and regeneration material. One method that can be used to fabricate porous HA is the sponge replicated method. In its fabrication, the sponge replicated method is influenced by sintering temperature and binder composition. Polyvinyl alcohol (PVA) is a widely used binder because it can be evaporated without leaving traces and is biocompatible. This paper will examine the effect of sintering temperature and composition of PVA as a binder in pore HA fabrication. In particular, this paper compares the fabrication process with the characteristics of the resulting porous HA against commercial products and ISO 13379:2015 standards. According to the preliminary study, pore HA that conforms to the standard will have a good impact on the healing process of bone defects. The novelty of this research is to explore in depth related to the fabrication of HA pores using the sponge replicated method with sintering temperature parameters and the composition of PVA as a binder so that it is expected to be a literature for future researchers.
Design, fabrication, and performance testing of an energy storage and return (ESAR) foot prosthesis made of prepreg carbon composite Rifky Ismail; Murti Ayu Nursafitri; Akmal Putra Fardinansyah; Deni Fajar Fitriyana; Athanasius Priharyoto Bayuseno; Januar Parlaungan Siregar; Muji Setiyo; Alfiana Fitri Istiqomah; Sulistyo Sulistyo
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12652

Abstract

The high demand for prosthetics in Indonesia is not followed by the ability and quality of local production to fulfill the community's needs. There is a lack of comprehensive data regarding the specific challenges encountered by local prosthetic manufacturers in Indonesia, particularly in terms of technological limitations. This study aims to understand the effect of design parameters on the performance of the energy storage and return (ESAR) foot prosthesis prototype in normal walking activities for amputees. Three different designs were created according to commercial products, and a convergence test was conducted to ensure accurate results. Finite element method (FEM) analysis was used to determine the amount of deformation that occurred in each design made when applied with 824 N axial force. The ESAR foot prosthesis prototype made from carbon prepreg was fabricated using an out-of-autoclave method, and the mechanical testing was performed with a compressive test. The results indicated that the optimal design for the ESAR foot prosthesis determined by the decision matrix scoring criteria was Design 3. The final scores for Designs 1, 2, and 3 were 54, 53, and 77, respectively. Design 3 is the easiest to manufacture, has the slightest complexity, and the lightest mass, and undergoes the least deformation during simulation, although it is the least attractive. The study found a significant difference in displacement between the deflections obtained from simulation and experiment. This occurred because the prototype was found to have delamination, which decreased the load-bearing ability of the prototype during compressive testing. Compressive testing on the prototype yielded a deflection of 22.695 mm in heel strike and 18.065 mm in toe-off positions, while FEM analysis showed 16.377 mm and 3.912 mm. Therefore, strict quality control is essential, especially when using materials such as carbon prepreg, which are prone to delamination if not properly processed.
Stress distribution on the L1/L2 endplates under multiaxial loads: A finite element study Hasyid Ahmad Wicaksono; Muhammad Rafli; Muhamad Bilal; M. Danny Pratama Lamura; Mohamad Izzur Maula; Athanasius Priharyoto Bayuseno; Tri Indah Winarni; Jamari Jamari
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12843

Abstract

Understanding stress distribution on lumbar vertebral endplates is essential for predicting mechanical failure and guiding clinical interventions. Therefore, this study aims to investigate the von Mises stress patterns on the L1/L2 endplates under multiaxial loading using a 3-dimensional finite element (FE) model derived from CT imaging of a healthy 55-year-old male. Anatomical structures were reconstructed in Mimics 21.0, and simulations were conducted in ANSYS Workbench 2023 R2. Material properties for cortical bone, cancellous bone, and intervertebral disc were assigned based on validated biomechanical data. A compressive load of 500 N and multiaxial moments ranging from 2.5 to 10 N•m were applied to simulate physiological movements, while the inferior surface of L2 was fully constrained to reflect realistic boundary conditions. The results showed that the superior endplate experienced the highest von Mises stress, particularly during flexion and lateral bending, indicating increased vulnerability to mechanical overload. Extension loading significantly reduced stress on both endplates, with a 60.54% decrease on the superior endplate and 69.17% on the inferior endplate. Stress distribution was asymmetrical and was influenced by anatomical features, such as cortical thickness and trabecular alignment. These results show the superior endplate as a biomechanically critical region prone to degeneration, emphasizing its importance in implant design, preventive strategies, and risk assessment for microfracture in high-risk populations.
Co-Authors Akmal Putra Fardinansyah Alfiana Fitri Istiqomah Baharudin Priwintoko Fitriyana, Deni Fajar Hasyid Ahmad Wicaksono Jamari Jamari Januar Parlaungan Siregar M. Danny Pratama Lamura Mohamad Izzur Maula Muhamad Bilal Muhammad Rafli Muji Setiyo Murti Ayu Nursafitri Rifky Ismail Sulistyo Sulistyo Tri Indah Winarni Yusuf Subagyo