Events The 1st International Online Conference on Functional Biomaterials

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Published

This submission belongs to the session A. Dental Biomaterials of the event The 1st International Online Conference on Functional Biomaterials

Published date

08 Jul, 2024

Academic Editor

Gianrico Spagnuolo

Citation

Rasha M. Abdelraouf, Tamer M Hamdy, Abdulaziz Alhotan, Sahar Ahmed Abdalbary, An Innovative Surface Treatment Technique for Coating 3D-Printed Polyamide 12 using Hydroxyapatite, in Proceedings of The 1st International Online Conference on Functional Biomaterials, 10 July–12 July 2024, MDPI: Basel, Switzerland

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An Innovative Surface Treatment Technique for Coating 3D-Printed Polyamide 12 using Hydroxyapatite

Rasha M. Abdelraouf ¹

Sahar Ahmed Abdalbary ²

Abdulaziz Alhotan ³

Tamer M Hamdy ⁴

1. Biomaterials Department, Faculty of Dentistry, Cairo University, Egypt., Egypt

2. Department of Orthopaedic Physical Therapy, Faculty of Physical Therapy, Nahda University, Beni Suef, Egypt, Egypt

3. Department of Dental Health, College of Applied Medical Sciences, King Saud University, Riyadh , Saudi Arabia, Saudi Arabia

4. Restorative and Dental Materials Department, Oral and Dental Research Institute, National Research Centre (NRC), El Bohouth St., Dokki, Giza, Egypt, Egypt

Abstract

Introduction: Polymer 3D printing has gained wide applications in the medical field. Polyamide 12 has been used to reconstruct bony defects. Coating its surface with calcium phosphate compounds, as hydroxyapatite, could enhance its bonding with bone. In this study, a simple innovative surface treatment was introduced by applying light-cured cement to coat 3D-printed polyamide 12 specimens with hydroxyapatite.

Methods: Polyamide 12 powder was printed by selective laser sintering to produce 40 disc-shaped specimens (15 mm diameter x 1.5 mm thickness). The specimens were divided randomly into two main groups: 1) a control (untreated) group, where the surface of the specimens was left without any modifications; and 2) a treated group, where the surface of the specimens was coated with hydroxyapatite by a new method using a light-cured dental cement. Each group was further subdivided into two subgroups according to the immersion in simulated body fluid (SBF). The first subgroup was not immersed in SBF and was left as printed, while the second subgroup was immersed in SBF for 15 days (n = 10/subgroup). The surfaces of the control and treated specimens were examined using an environmental scanning electron microscope (SEM) and energy-dispersive X-ray analysis (EDXA) before and after immersion in SBF.

Results: The SEM micrographs of the control 3D-printed polyamide 12 specimens illustrated the agglomerated 3D-printed particles with minimal porosity. Their EDXA revealed the presence of carbon, nitrogen, and oxygen. This surface was not affected by immersion in SBF, as detected by SEM and EDXA. The microstructure of the coated specimens showed deposited clusters of calcium and phosphorus on the surface, in addition to carbon, nitrogen, and oxygen. This coat was stable after immersion, as detected by SEM and EDXA.

Conclusions: Using light-cured cement could be considered a simple method to coat the 3D-printed polyamide 12 with hydroxyapatite.

Keywords

Polyamide

3D Printing

Hydroxyapatite

Coating

Surface Treatment Technique

Oral Presentation

Rasha_Biomaterials_ ppt.pptx

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