Carbonated Hydroxyapatite-Based Honeycomb Scaffold Coatings on a Titanium Alloy for Bone Implant Application—Physicochemical and Mechanical Properties Analysis

• Main Authors: Mona Sari, Nicholas Adi Kristianto, Chotimah, Ika Dewi Ana, Yusril Yusuf
• Format: Article
• Language: English
• Published: MDPI AG 2021-08-01
• Series: Coatings
• Subjects: carbonated hydroxyapatite; scaffold; titanium alloy; electrophoretic deposition dip coating (EP2D); bone implant application
• Online Access: https://www.mdpi.com/2079-6412/11/8/941

In this work, carbonated hydroxyapatite (CHA) based on abalone mussel shells (<i>Haliotis asinina)</i> is synthesized using the co-precipitation method. The synthesized CHA was mixed with honeycomb (HCB) 40 wt.% for the scaffold fabrication process. CHA and scaffold CHA/HCB 40 wt.% were used for coating a Titanium (Ti) alloy using the electrophoretic deposition dip coating (EP2D) method with immersion times of 10, 20, and 30 min. The synthesized B-type CHA with a stirring time of 45 min could have lower transmittance values and smaller crystallite size. Energy dispersive X-ray spectroscopy (EDS) showed that the Ca/P molar ratio was 1.79. The scaffold CHA/HCB 40 wt.% had macropore size, micropore size, and porosity of 102.02 ± 9.88 μm, 1.08 ± 0.086 μm, and 66.36%, respectively, and therefore it can also be applied in the coating process for bone implant applications due to the potential scaffold for bone growth. Thus, it has the potential for coating on Ti alloy applications. In this study, the compressive strength for all immersion time variations was about 54–83 MPa. The average compression strengths of human cancellous bone were about 0.2–80 MPa. The thickness obtained was in accordance with the thickness parameters required for a coating of 50–200 μm.