Half pins stress shielding interaction behavior at implant-bone interface

Nur Fatin Izzati Ibrahim, Ruslizam Daud, Muhammad Khairul Ali Hassan, Noor Alia Md Zain, Mohd Yazid Bajuri

Research output: Contribution to journalArticle

Abstract

This paper presents the fixation stability of tapered conical half-pin and trocar-tip tapered half-pin due to self-pin loosening failure of uniaxial external fixator for femur diaphysis cortical bone. Clinical failure of external fixator is caused by the stress interaction between assembled pin, ring, rods and locking devices. Screw pins that used to hold the fixation stability are reported to fail due to screw loosening. This study aims to investigate the pin-bone stress interaction mechanism between tapered conical (TC) half-pin and trocar-tip tapered (TTT) half-pin based on stress transfer parameter (STP). Finite element (FE) analysis has been conducted and STP algorithm has been executed for TC and TTT half pin configuration. The effect of pin's types and materials on the load sharing with surrounding bone resorption were analysed. TC and TTT half pin models were analysed using four types of materials (titanium alloy Ti-6Al-4V, stainless steel 316L, magnesium alloy and carbon fiber) to determine the von-Mises stress and stress-strain shielding. It is found that the pins were yielded at the thread of pin near to hard-soft tissue interface which is agreed with the reported clinical screw implant fracture. A high value of von-Mises for TTT made by stainless steel shows that the pin material gives a good mechanical stimulus but TTT made by magnesium alloy possess the highest STP between the pin and the bone and at the same time increase the level of stability in order to starts the bone remodelling process.

Original languageEnglish
Pages (from-to)204-208
Number of pages5
JournalInternational Journal of Integrated Engineering
Volume10
Issue number5
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Shielding
Bone
Stainless Steel
Magnesium alloys
Stainless steel
Titanium alloys
Carbon fibers
Tissue
Finite element method

Keywords

  • Fixation stability
  • Screw loosening
  • Stress transfer parameter

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science (miscellaneous)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Half pins stress shielding interaction behavior at implant-bone interface. / Ibrahim, Nur Fatin Izzati; Daud, Ruslizam; Hassan, Muhammad Khairul Ali; Zain, Noor Alia Md; Bajuri, Mohd Yazid.

In: International Journal of Integrated Engineering, Vol. 10, No. 5, 01.01.2018, p. 204-208.

Research output: Contribution to journalArticle

Ibrahim, Nur Fatin Izzati ; Daud, Ruslizam ; Hassan, Muhammad Khairul Ali ; Zain, Noor Alia Md ; Bajuri, Mohd Yazid. / Half pins stress shielding interaction behavior at implant-bone interface. In: International Journal of Integrated Engineering. 2018 ; Vol. 10, No. 5. pp. 204-208.
@article{b043e050e0ca44f3861554537f1a168a,
title = "Half pins stress shielding interaction behavior at implant-bone interface",
abstract = "This paper presents the fixation stability of tapered conical half-pin and trocar-tip tapered half-pin due to self-pin loosening failure of uniaxial external fixator for femur diaphysis cortical bone. Clinical failure of external fixator is caused by the stress interaction between assembled pin, ring, rods and locking devices. Screw pins that used to hold the fixation stability are reported to fail due to screw loosening. This study aims to investigate the pin-bone stress interaction mechanism between tapered conical (TC) half-pin and trocar-tip tapered (TTT) half-pin based on stress transfer parameter (STP). Finite element (FE) analysis has been conducted and STP algorithm has been executed for TC and TTT half pin configuration. The effect of pin's types and materials on the load sharing with surrounding bone resorption were analysed. TC and TTT half pin models were analysed using four types of materials (titanium alloy Ti-6Al-4V, stainless steel 316L, magnesium alloy and carbon fiber) to determine the von-Mises stress and stress-strain shielding. It is found that the pins were yielded at the thread of pin near to hard-soft tissue interface which is agreed with the reported clinical screw implant fracture. A high value of von-Mises for TTT made by stainless steel shows that the pin material gives a good mechanical stimulus but TTT made by magnesium alloy possess the highest STP between the pin and the bone and at the same time increase the level of stability in order to starts the bone remodelling process.",
keywords = "Fixation stability, Screw loosening, Stress transfer parameter",
author = "Ibrahim, {Nur Fatin Izzati} and Ruslizam Daud and Hassan, {Muhammad Khairul Ali} and Zain, {Noor Alia Md} and Bajuri, {Mohd Yazid}",
year = "2018",
month = "1",
day = "1",
doi = "10.30880/ijie.2018.10.05.030",
language = "English",
volume = "10",
pages = "204--208",
journal = "International Journal of Integrated Engineering",
issn = "2229-838X",
publisher = "Penerbit UTHM",
number = "5",

}

TY - JOUR

T1 - Half pins stress shielding interaction behavior at implant-bone interface

AU - Ibrahim, Nur Fatin Izzati

AU - Daud, Ruslizam

AU - Hassan, Muhammad Khairul Ali

AU - Zain, Noor Alia Md

AU - Bajuri, Mohd Yazid

PY - 2018/1/1

Y1 - 2018/1/1

N2 - This paper presents the fixation stability of tapered conical half-pin and trocar-tip tapered half-pin due to self-pin loosening failure of uniaxial external fixator for femur diaphysis cortical bone. Clinical failure of external fixator is caused by the stress interaction between assembled pin, ring, rods and locking devices. Screw pins that used to hold the fixation stability are reported to fail due to screw loosening. This study aims to investigate the pin-bone stress interaction mechanism between tapered conical (TC) half-pin and trocar-tip tapered (TTT) half-pin based on stress transfer parameter (STP). Finite element (FE) analysis has been conducted and STP algorithm has been executed for TC and TTT half pin configuration. The effect of pin's types and materials on the load sharing with surrounding bone resorption were analysed. TC and TTT half pin models were analysed using four types of materials (titanium alloy Ti-6Al-4V, stainless steel 316L, magnesium alloy and carbon fiber) to determine the von-Mises stress and stress-strain shielding. It is found that the pins were yielded at the thread of pin near to hard-soft tissue interface which is agreed with the reported clinical screw implant fracture. A high value of von-Mises for TTT made by stainless steel shows that the pin material gives a good mechanical stimulus but TTT made by magnesium alloy possess the highest STP between the pin and the bone and at the same time increase the level of stability in order to starts the bone remodelling process.

AB - This paper presents the fixation stability of tapered conical half-pin and trocar-tip tapered half-pin due to self-pin loosening failure of uniaxial external fixator for femur diaphysis cortical bone. Clinical failure of external fixator is caused by the stress interaction between assembled pin, ring, rods and locking devices. Screw pins that used to hold the fixation stability are reported to fail due to screw loosening. This study aims to investigate the pin-bone stress interaction mechanism between tapered conical (TC) half-pin and trocar-tip tapered (TTT) half-pin based on stress transfer parameter (STP). Finite element (FE) analysis has been conducted and STP algorithm has been executed for TC and TTT half pin configuration. The effect of pin's types and materials on the load sharing with surrounding bone resorption were analysed. TC and TTT half pin models were analysed using four types of materials (titanium alloy Ti-6Al-4V, stainless steel 316L, magnesium alloy and carbon fiber) to determine the von-Mises stress and stress-strain shielding. It is found that the pins were yielded at the thread of pin near to hard-soft tissue interface which is agreed with the reported clinical screw implant fracture. A high value of von-Mises for TTT made by stainless steel shows that the pin material gives a good mechanical stimulus but TTT made by magnesium alloy possess the highest STP between the pin and the bone and at the same time increase the level of stability in order to starts the bone remodelling process.

KW - Fixation stability

KW - Screw loosening

KW - Stress transfer parameter

UR - http://www.scopus.com/inward/record.url?scp=85061666953&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061666953&partnerID=8YFLogxK

U2 - 10.30880/ijie.2018.10.05.030

DO - 10.30880/ijie.2018.10.05.030

M3 - Article

VL - 10

SP - 204

EP - 208

JO - International Journal of Integrated Engineering

JF - International Journal of Integrated Engineering

SN - 2229-838X

IS - 5

ER -