UTILISATION OF NATURAL HYDROXYAPATITE FROM LATES CALCARIFER SCALES TO INCREASE THE BIOACTIVITY IN SS 316L WITH THE DIP COATING METHOD FOR BONE IMPLANTS

Abstract

Hydroxyapatite (HA) from Lates calcarifer scales was used as a coating material for 316L Stainless Steel (SS 316L) to determine the influence of the thickness and withdrawal speed on the morphology of the layer. The dip coating method was used with variations in the mass of the HA in the coating suspension at a constant immersion time and carried out at 2 withdrawal speeds. The withdrawal speed used was 2 mm/s and 4 mm/s with variations in the HA content in the suspension of 4 g, 8 g, and 12 g at a constant immersion time of 10 seconds. Analysis of morphological characteristics and thickness were observed with a Stereo Microscope, Scanning Electron Microscopy (SEM) and a Sanfix Thickness Gauge. Based on the data obtained from this study, the optimal layer morphology is at a withdrawal speed of 2 mm/s with a mass of HA as much as 12 g in suspension because it has a uniform thickness value according to the biomedical standards and a coated surface area of 91.8%.

Keywords

• ss 316l
• hydroxyapatite
• lates calcarifer scales
• dip coating
• withdrawal speed