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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.
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.
Co-Authors Alifian Bagas Saputra Athanasius Priharyoto Bayuseno Athanasius Priharyoto Bayuseno Dhiaulhaque Dhiaulhaque Dzikra Adi Pratama Fatkhu Amanulloh Hastaka Juan Pratama Putra Kriswanto Mohd Syahmi Jamaludin Ruben Bayu Kristiawan Septian Eko Cahyono