Fabrication and evaluation of the mechanical properties of reinforced biodegradable magnesium scaffolds using the space holder method | ||
| Alexandria Dental Journal | ||
| Article 61, Volume 50, Issue 1, April 2025, Pages 126-132 PDF (341.79 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/adjalexu.2024.290833.1507 | ||
| Authors | ||
| Omnia Ghabour* 1; Nahla Taha2; Salma Aboulgheit3; Mona Hussein Mohy El Din4 | ||
| 1Teaching Assistant of Dental Biomaterials, Department of Dental Biomaterials, College of Dentistry, Arab Academy for Science, Technology and Maritime Transport (AASTMT), El-Alamein, Egypt | ||
| 2Modeling and Simulation Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications, New Borg Al-Arab City, Alexandria, Egypt. | ||
| 3Lecturer of Dental Biomaterials, Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria, Egypt. | ||
| 4Professor of Dental Biomaterials Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria Egypt | ||
| Abstract | ||
| Introduction: Magnesium metallic biomaterials have drawn attention as a promising bone substitute material because they can degrade spontaneously and have mechanical properties similar to those of bone. Despite that, rapid degradation is a major disadvantage of magnesium. Therefore, different approaches such as reinforcing magnesium with other phases have been developed to overcome this problem. Objective: The aim of this study was to fabricate magnesium (Mg) scaffolds alloyed with zinc (Zn) and different concentrations of hydroxyapatite (HA) using powder metallurgy route, then porosity assessment, characterization and evaluation of the mechanical properties of these composites. Methods: Magnesium (Mg), zinc (Zn), hydroxyapatite (HA) and ammonium bicarbonate space holding agent powder particles were mixed. Mixtures were divided into 3 groups according to the hydroxyapatite percentage: Group A (Mg-4%Zn-0%HA), group B (Mg-4%Zn-5%HA) and group C (Mg-4%Zn-7.5%HA). To fabricate the scaffolds, powder metallurgy route was used. Porosity assessment and characterization using Scanning Electron Microscope (SEM) were done. Testing of mechanical properties was done. Results: Porosity assessment and SEM characterization showed that the scaffolds were highly porous with group B having the highest percentage of porosity. Mechanical testing showed that the specimens of group A had the highest strength and elastic modulus among all specimens and scaffolds of group C had higher values of strength and elastic modulus than group B. Conclusion: This work showed that fabrication of magnesium scaffolds alloyed with other elements using powder metallurgy route is feasible and the obtained scaffolds were found to be potential scaffold materials for bone tissue engineering. | ||
| Keywords | ||
| Scaffolds; Biodegradable metals; Magnesium composites; Powder metallurgy | ||
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