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Jurnal Pendidikan Teknik Mesin
Published by Universitas Negeri Semarang
ISSN : -     EISSN : 25031759     DOI : https://doi.org/10.15294/jptm
Core Subject : Engineering,
Mechanical Engineering
First published in June 2001 and since then it is published biannually in June and December. Contains articles lifted from the results of research on field mechanical engineering and the idea of thinking (conceptual) for the development of education and teaching in the field of Mechanical Engineering, in particular at the Institute of Education Personnel (LPTK) and Vocational High School (SMK). The journal is also a means of communication between professors, teachers, instructors, practitioners in business / industry, as well as other related institutions.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 39 Documents
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THE EFFECT OF IMPLANT DIAMETER ON STRESS, STRAIN, AND SAFETY FACTOR IN SCREWS AND ABUTMENTS BASED ON FEA gunagung syahrul nizam sulkan; Kriswanto; Ruben Bayu Kristiawan; Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.29461

Abstract

The loss of anterior teeth has a significant impact on masticatory function and facial aesthetics, making dental implants a widely used rehabilitative solution. The success of implants is greatly influenced by geometric design, particularly the diameter of the fixture, which plays a role in distributing load. This study aims to analyze the influence of variations in implant diameter on stress distribution, strain, and safety factor in the screw and abutment areas using a three-dimensional Finite Element Analysis (FEA) approach. Three implant models with fixture diameters of 3.75 mm, 4.00 mm, and 5.00 mm were simulated using a vertical physiological load of 130.5 ± 73.6 N, assuming Ti-6Al-4V material and orthotropic properties of the mandibular bone. The results showed that Model 2 (4.00 mm diameter) had the most balanced stress distribution and the highest safety factor value at the abutment (12.251), while Model 3 exhibited the lowest stress and strain at the screw. Model 1 had the lowest biomechanical performance with the highest stress and strain and the lowest abutment safety factor (10.611). It can be concluded that variations in fixture diameter significantly affect the mechanical performance of the implant system, and a diameter of 4.00 mm is recommended as the most optimal design to support long-term strength and stability.
FINITE ELEMENT STUDY ON ANGULATED ABUTMENTS IN MAXILLARY POSTERIOR DENTAL IMPLANTS Fadhil Putra Ramadhan; Kriswanto; Kaleb Priyanto; Rahmat Doni Widodo; J. Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.29582

Abstract

Dental implants in the posterior maxilla often require angulated abutments due to anatomical limitations. However, increased abutment angulation may influence stress distribution and compromise mechanical integrity. This study aimed to evaluate the biomechanical behavior of implant components with 15°, 17°, and 20° abutment angulations using three-dimensional finite element analysis (FEA). A static vertical load of 276 N was applied to a D4-type bone block model. Results showed that higher abutment angles led to increased von Mises stress and strain, particularly on the abutment U-profile and the screw head. Despite the rising stress, all configurations maintained safety factors above 1.5. These findings indicate that angled abutments up to 20° are mechanically safe under axial loading conditions, supporting their use in clinically challenging posterior maxillary regions.
FIXTURE DIAMETER INFLUENCE ON BIOMECHANICAL PERFORMANCE OF DENTAL IMPLANT ABUTMENT AND SCREW: A 3D FEA STUDY Rachael Andika; Kriswanto; Khoirul Huda; Rahmat Doni Widodo; J. Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.29583

Abstract

Dental implant stability hinges on fixture design, particularly diameter, influencing biomechanical performance. This study evaluates the impact of fixture diameter on von Mises stress, strain, and factor of safety in the abutment and screw of posterior dental implants using finite element analysis. A three-dimensional model of a mandibular first molar implant was developed with fixture diameters of 3.75, 4.0, and 5.0 millimeters, using Ti-6Al-4V and static loading simulating maximum voluntary clenching (177.38 N). Results show that the 5.0-millimeter diameter with a wider abutment reduces stress by 23.7 percent in the abutment and 33.9 percent in the screw, strain by 23.7 and 33.1 percent, respectively, and improves factor of safety, compared to 3.75 millimeters. The 5.0-millimeter diameter optimizes biomechanical stability, enhancing long-term implant success in posterior mandibular applications.
Biomechanical Evaluation of Implant Angulation on the First Mandibular Premolar: A 3D Finite Element Study Andrean Rachman Rizaldy; Kriswanto; Septian Eko Cahyanto; Rahmat Doni Widodo; J. Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.29780

Abstract

The design and orientation of dental implant connections play a critical role in biomechanical success, particularly in the posterior mandibular region, which is subjected to high occlusal loads. This study aims to evaluate the effect of varying abutment angulations (0°, 15°, and 25°) on stress distribution, strain, and safety factor in a reverse-buttress implant system using the Finite Element Analysis (FEA) approach. A 3D implant model was simulated within an idealized bone block using ANSYS software, applying a physiological static load of 240 N. The results showed that increasing abutment angulation significantly elevated both maximum stress and strain, particularly in the screw component, which experienced a peak stress of 455.89 MPa at 15°. The safety factor, calculated based on the yield strength of titanium grade 5 (880 MPa), decreased from 14.18 (0° abutment) to 2.94 (25° abutment). Although all configurations remained within safe limits (>1.5), the axial (0°) configuration demonstrated the most stable load distribution and the highest safety margin. This study underscores the importance of considering abutment angulation in implant planning and supports the use of safety factor–based FEA as a predictive tool for assessing implant structural safety.
THREE-DIMENSIONAL FEA OF FIXTURE DIAMETER INFLUENCE ON ABUTMENT AND SCREW IN ANTERIOR MAXILLA BRIDGES Beni Aji Subekti; Kriswanto; Febri Budi Darsono; Rahmat Doni Widodo; J. Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.29860

Abstract

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.
Effect of Implant Diameter on Biomechanical Response of Straight Multi-Unit Abutments in Mandibular All-on-3: A 3D Finite Element Study Muhammad Iqbal Ramadhani; Kriswanto; Febri Budi Darsono; Rahmat Doni Widodo; J. Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.30115

Abstract

This study evaluates the biomechanical performance of varying implant fixture diameters in mandibular edentulous rehabilitation using the All-on-3 concept with straight multi-unit abutments. A three-dimensional finite element model of a mandible segment was constructed and subjected to static occlusal loading conditions derived from clinical bite force data. Three Brånemark-type implants with diameters of 3.75 mm, 4.0 mm, and 5.0 mm were analyzed using ANSYS Workbench to assess von Mises stress, equivalent strain, and factor of safety (FOS) in abutment and screw components. The results revealed that increasing the fixture diameter to 5.0 mm reduced von Mises stress by 12.8- 15.0% in abutments and 17-44.3% in screws across anterior and posterior positions. Similarly, strain decreased by up to 11.1% in abutments and 45.0% in screws. The highest FOS (37.48 for abutment, 25.09 for screw) was recorded at the 5.0 mm diameter, confirming enhanced safety margins. However, posterior implants experienced stress transfer from abutment to screw components as diameter increased, particularly due to local stiffness mismatch and cantilever effects. While all configurations remained below Ti-6Al-4V yield strength, the posterior 3.75 mm setup yielded the lowest FOS (1.45), suggesting a higher mechanical risk. These findings emphasize the need for careful diameter selection in posterior All-on-3 designs.
FIRST MANDIBULAR MOLAR IMPLANT SYSTEM UNDER ORTHOTROPIC BONE VARIATIONS: A FINITE ELEMENT SENSITIVITY ANALYSI Fatkhu Amanulloh; Kriswanto; Ruben Bayu Kristiawan; Jamari; Athanasius Priharyoto Bayuseno; Dhiaulhaque; Dzikra Adi Pratama; Mohd Syahmi Jamaludin
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.54256

Abstract

Physiological variability in bone mechanical properties may affect load transfer and biomechanical stability in dental implant systems. However, the influence of orthotropic elastic and shear properties on implant–bone biomechanics remains unclear. This study evaluated the sensitivity and robustness of a mandibular first molar implant system to variations in orthotropic bone properties using finite element analysis. A three-dimensional implant–bone model was analyzed under nine material configurations, including gradual orthotropic variations (±15% of baseline) and independent modifications of the elastic and shear modulus. Biomechanical responses were evaluated using von Mises stress, principal stresses, strains, and displacements. Stress concentrations were primarily located at the implant–abutment connection and crestal cortical bone, indicating the main load-transfer pathways. Increasing directional stiffness reduced peri-implant strain and displacement but increased cortical stress, revealing a trade-off between deformation reduction and local stress concentration. Elastic modulus predominantly influenced global stress redistribution, whereas shear modulus had a greater effect on local deformation and peri-implant stability. Strain and displacement were more sensitive to material variations than stress-based parameters. These findings emphasize the importance of orthotropic material representation for realistic biomechanical assessment of dental implant systems under physiological variations in bone quality.
COMPARATIVE BIOMECHANICAL ANALYSIS OF POSTERIOR MANDIBULAR PREMOLAR IMPLANTS: EFFECTS OF MATERIAL MODELING, CONTACT CONDITIONS, AND LOADING DIRECTION Dennis Andhara Putra; Kriswanto; Khoirul Huda; Jamari; Athanasius Priharyoto Bayuseno; Dhiaulhaque; Nurul Fatulloh; Mohd Syahmi Jamaludin
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.54363

Abstract

Posterior tooth loss in the mandibular region may reduce masticatory performance and compromise biomechanical stability, thereby requiring predictable and well-designed implant rehabilitation strategies. This study evaluates the mechanical behavior of an implant–bone system by considering variations in bone material representation (isotropic and orthotropic models), implant–bone interface conditions (fully bonded and frictional contact), and loading orientations (axial and oblique) through a validated three-dimensional finite element analysis (3D-FEA) framework. A full factorial design comprising eight simulation configurations was implemented to assess 15 biomechanical output parameters, including von Mises stress, principal strain, and displacement across implant components and surrounding cortical and cancellous bone tissues. The results indicate that the biomechanical response of the system is strongly dependent on both structural components and loading context. The orthotropic bone model tends to increase stress and deformation responses under specific conditions, whereas oblique loading generally produces higher peak mechanical responses than axial loading. Furthermore, the influence of contact conditions is not uniform but varies according to material assumptions and loading direction, suggesting that simplified fully bonded interfaces may not fully capture realistic implant–bone interactions. Overall, the findings highlight the importance of incorporating anisotropic bone behavior, realistic interface modeling, and clinically relevant loading directions to improve the accuracy of stress prediction around dental implants. This study provides numerical evidence that may support improved implant design strategies and enhance the reliability of future finite element–based biomechanical investigations. 
BIOMECHANICAL SENSITIVITY OF A THREE-IMPLANT MANDIBULAR REHABILITATION MODEL UNDER ORTHOTROPIC BONE PROPERTY VARIATIONS: A 3D FINITE ELEMENT STUDY Alifian Bagas Saputra; Kriswanto; Septian Eko Cahyono; Jamari; Athanasius Priharyoto Bayuseno; Dhiaulhaque; Hastaka Juan Pratama Putra
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.54368

Abstract

Achieving clinical effectiveness depends on an awareness of the mechanical features of implanted supported mandibular prosthesis. This study used three-dimensional finite element analysis to assess how sensitive a three-implant mandibular arrangement is to changes in the properties of cortical and cancellous bone. Using Ti-6Al-4V material, implants were shown; the bone was defined with orthotropic linear-elastic properties. Young's modulus and shear modulus were systematically changed by 5–15%. Under a 100 N axial load, biomechanical reactions including von Mises stress, principal strain, and displacement were studied with variation coefficients employed to evaluate their consistency. The results showed that stress had minimal changes while strain, particularly in cortical and cancellous bone, was quite sensitive to changes in material characteristics. Young's modulus had a greater influence than shear modulus, and increasing stiffness reduced total displacement. Still, the three-implant system showed consistent load distribution patterns, which suggested strong biomechanical stability. These findings underline how important bone flexibility is for the dynamics of peri-implant tissue and support the application of strain-related metrics for estimating implant placements.

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