Pengaruh Desain Kepala Miniscrew Berbahan PEEK Terhadap Bending Strength dan Bearing Strength

Putra, Giovrey Ernesto (2026) Pengaruh Desain Kepala Miniscrew Berbahan PEEK Terhadap Bending Strength dan Bearing Strength. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan miniscrew ortodontik sebagai Temporary Anchorage Device (TADs) menghadapi tantangan terkait stress shielding dan hipersensitivitas pada material logam konvensional seperti Titanium (Ti-6Al-4V). Polyetheretherketone (PEEK) muncul sebagai material alternatif yang memiliki modulus elastisitas mendekati tulang manusia, namun keterbatasan kekakuannya menuntut optimasi desain yang tepat. Penelitian ini bertujuan untuk mengobservasi nilai bending strength dan bearing strength pada miniscrew PEEK dan Titanium melalui variasi miniscrew, serta menentukan desain paling optimal untuk aplikasi klinis; Metode penelitian menggunakan simulasi numerik Finite Element Analysis (FEA) dengan beban ortodontik luar biasa sebesar 11,11 N lateral dan 2,97 N vertikal. Optimasi desain dilakukan menggunakan pendekatan parametrik dengan meningkatkan diameter dalam dan profil ulir dalam interval 0,1 mm (Variasi 1) hingga 0,2 mm (Variasi 2). Parameter yang diamati meliputi Equivalent Von-mises Stress, Total deformation untuk menganalisis bending strength, dan parameter Contact pressure, Maximum principal stress pada tulang mandibula untuk menganalisis Bearing Strength; Hasil penelitian menunjukkan bahwa desain standar PEEK memiliki keunggulan dalam aspek bearing strength dengan mereduksi Maximum principal stress pada tulang sebesar 29,5% dibandingkan Titanium, namun gagal memenuhi stabilitas klinis karena deformasi yang tinggi (0,143 mm) dan contact pressure. Melalui optimasi parametrik, Variasi 1 (+0,1 mm pada area kritis) terbukti paling efektif dalam meningkatkan bending strength, di mana nilai deformasi berhasil ditekan menjadi 0,045 mm (di bawah ambang batas klinis 0,05 mm). Sebaliknya, Variasi 2 (+0,2 mm pada area kritis) meskipun lebih kaku, menyebabkan lonjakan contact pressure ekstrem hingga 220,70 MPa yang berbahaya bagi jaringan biologis. Disimpulkan bahwa desain Variasi 1 merupakan desain paling optimal yang mampu menyeimbangkan kekuatan struktural dan performa penjangkaran tanpa mengorbankan keamanan biologis jaringan tulang mandibula.
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The use of orthodontic miniscrews as Temporary Anchorage Devices (TADs) faces challenges related to stress shielding and the risk of hipersensitivity in conventional metal materials such as Titanium (Ti-6Al-4V). Polyetheretherketone (PEEK) has emerged as an alternative material with a Young’s modulus closer to human bone, yet its limited stiffness necessitates precise design optimization. This study aims to observe the bending strength and bearing strength of PEEK and Titanium miniscrews through miniscrew variations and to determine the most optimal design for clinical applications; The research methodology employed numerical simulations using Finite Element Analysis (FEA) under functional orthodontic overloads of 11.11 N laterally and 2.97 N vertically. Design optimization was conducted using a parametric approach by increasing the inner diameter and thread profile in intervals of 0.1 mm (Variation 1) to 0.2 mm (Variation 2). Observed parameters included Equivalent Von-mises Stress, Total deformation, Contact pressure, and Maximum principal stress on the mandibular bone; The results indicated that the standard PEEK design excels in bearing strength by reducing the Maximum principal stress on the bone by 29.5% compared to Titanium, but fails to meet clinical stability requirements due to high deformation (0.143 mm). Through parametric optimization, Variation 1 (+0.1 mm) proved most effective in enhancing bending strength, where the deformation value was successfully suppressed to 0.045 mm (below the clinical threshold of 0.05 mm). Conversely, Variation 2 (+0.2 mm), while stiffer, caused an extreme surge in contact pressure up to 220.70 MPa, which is hazardous to biological tissues. It is concluded that Variation 1 is the most optimal design, capable of balancing structural strength and anchorage performance without compromising the biological safety of the mandibular bone tissue.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Miniscrew Ortodontik, PEEK, Bending Strength, Bearing Strength, Finite Element Analysis, Desain Parametrik Orthodontic Miniscrew, PEEK, Bending Strength, Bearing Strength, Finite Element Analysis, Parametric Design
Subjects:	R Medicine > R Medicine (General) R Medicine > R Medicine (General) > R857.M3 Biomedical materials. Biomedical materials--Testing. R Medicine > RK Dentistry
Divisions:	Faculty of medicine and health (MEDICS) > Medical Technology > 11503-(S1) Undergraduate Thesis
Depositing User:	Giovrey Ernesto Putra
Date Deposited:	02 Feb 2026 03:57
Last Modified:	02 Feb 2026 03:57
URI:	http://repository.its.ac.id/id/eprint/131532

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