Art Original

International Journal on Advanced Science, Engineering and Information Technology (IJASEIT) Vol.16, No.4, Aug 2026 | Evaluation of the Mechanical Strength of Cortical Screw Threads through Torsion and Shear Tests in Bone Fixation

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In the field of orthopedics, the tightness of screws in bone fixation is generally unknown. Improper fixation may affect fracture healing. The purpose of this study was to determine the torsional and shear strengths during bone fixation and to analyze bone damage induced by torsional and shear loads. The method used in this study was experimental, consisting of torsion and shear tests. Two bone plates were joined using cortical screws of titanium alloy with a diameter of 4.5 mm. The torsion test of the bone joint was conducted using a torque wrench, while the shear test was performed by applying tensile force until bone damage occurred. The results showed that the torque generated in cortical screw fixation was 4.16 Nm, with no damage observed in the internal thread of the hole and a sufficiently tight contact between the screw head and the bone surface. In the shear test, the applied load was 1.96 MPa, under which no bone damage was observed, and the minimum shear displacement was 2 mm. Further testing indicated that at a maximum torque of 5.04 Nm and a maximum shear load of 2.45 MPa, bone damage occurred in the form of cracks, oval deformation of the screw hole, and fractures on the upper bone surface. Therefore, it can be concluded that the maximum allowable shear load in bone fixation is 1.96 MPa to avoid damage.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

050

Penerbit

: International Journal on Advanced Science, Engineering and Information Technology (IJASEIT)., 2026

Deskripsi Fisik

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Bahasa

English

ISBN/ISSN

2088-5334

Klasifikasi

050

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

JURNAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

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Versi lain/terkait

Lampiran Berkas

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