Prediction of stress shielding around implant screws induced by three-point and four-point bending


  • Izzawati Basirom Universiti Malaysia Perlis (UniMAP)
  • Mohd Afendi Rojan Universiti Malaysia Perlis (UniMAP)
  • Mohd Shukry Abdul Majid Universiti Malaysia Perlis (UniMAP)
  • Nor Alia Md Zain Universiti Malaysia Perlis (UniMAP)
  • Mohd Yazid Bajuri Universiti Kebangsaan Malaysia



Stress shielding, biocompatibility, strain energy density, bone-implant interaction


Implant screws failure commonly occurs due to the load that constantly generated by the patient’s body to the fracture area. Bending load is often encountered in femur bone due to lateral impact which affected the bone and also the implants installed. Consequently, the load will lead to the failure of implants that can cause loosening or tightening of implants. Henceforth, in this manner, it is significant to study the bending behavior of bone implant in femur bone. The aim of this study was to analyze the stress shielding of bone implant on the internal fixator. 3D technique is able to show the overall deformation and stress distribution. The lower the biomechanical compatibility, the lower the STP value obtained. In addition, the variation of elastic modulus (E) of the screws materials, 200GPa (Stainless Steel) and 113.8GPa (Titanium) resulted in the increase of the total stress transferred (STP) between screw and bone interface. In this work, strain energy density (SED) was determined as a good indicator of stress shielding.

Author Biographies

Izzawati Basirom, Universiti Malaysia Perlis (UniMAP)

Mechanical Programme,
School of Mechatronic,
Universiti Malaysia Perlis (UniMAP),
Pauh Putra Campus,
02600 Arau Perlis

Mohd Afendi Rojan, Universiti Malaysia Perlis (UniMAP)

Mechanical Programme,
School of Mechatronic,
Universiti Malaysia Perlis (UniMAP),
Pauh Putra Campus,
02600 Arau Perlis

Mohd Shukry Abdul Majid, Universiti Malaysia Perlis (UniMAP)

Mechanical Programme,
School of Mechatronic,
Universiti Malaysia Perlis (UniMAP),
Pauh Putra Campus,
02600 Arau Perlis

Nor Alia Md Zain, Universiti Malaysia Perlis (UniMAP)

Institute of Mathematics

Mohd Yazid Bajuri, Universiti Kebangsaan Malaysia

UKM Medical Centre, Department of Orthopedics and Traumatology


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