Challenges in the use of zinc and its alloys as biodegradable metals: Perspective from biomechanical compatibility

An experiment was performed to determine the effects of stiffness of cruciate ligament prostheses upon joint function and degeneration. Twenty four sheep were allocated into four groups. One group had the ligament excised with no replacement and subsequent groups underwent substitution procedures with either a stiff, matched, or lax prosthesis. After six months the animals with a stiff or matched prosthesis were significantly less lame than those with a lax prosthesis or no prosthesis. However, at post mortem examination the animals with a stiff prosthesis or no prosthesis showed significantly more widespread cartilage damage than the matched or lax groups. The results indicate that either a stiff or matched prosthesis may restore functional activity, but that the stiff prosthesis may predispose to increased degenerative changes.

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Biodegradable Metals

Metals ◽

10.3390/met8100804 ◽

2018 ◽

Vol 8 (10) ◽

pp. 804 ◽

Cited By ~ 2

Author(s):

Eli Aghion

Keyword(s):

Mechanical Properties ◽

Biodegradable Polymers ◽

Metal Implants ◽

Biodegradable Metals

Over the last two decades, significant scientific efforts have been devoted to developingbiodegradable metal implants for orthopedic and cardiovascular applications, mainly due to theirimproved mechanical properties compared to those of biodegradable polymers [...]

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Comparative mechanical and corrosion studies on magnesium, zinc and iron alloys as biodegradable metals

Materiali in tehnologije ◽

10.17222/mit.2014.129 ◽

2015 ◽

Vol 49 (6) ◽

pp. 877-882 ◽

Cited By ~ 18

Author(s):

Dalibor Vojtěch ◽

Jiří Kubásek ◽

Jaroslav Čapek

Keyword(s):

Iron Alloys ◽

Corrosion Studies ◽

Biodegradable Metals

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

Malaysian Journal of Fundamental and Applied Sciences ◽

10.11113/mjfas.v15n4.1049 ◽

2019 ◽

Vol 15 (4) ◽

pp. 548-554

Author(s):

Izzawati Basirom ◽

Mohd Afendi Rojan ◽

Mohd Shukry Abdul Majid ◽

Nor Alia Md Zain ◽

Mohd Yazid Bajuri

Keyword(s):

Strain Energy ◽

Stress Shielding ◽

Lateral Impact ◽

Bone Implant ◽

Femur Bone ◽

Four Point Bending ◽

Biomechanical Compatibility ◽

Bending Load ◽

Fracture Area ◽

Bending Behavior

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.

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