The Surface Characteristic Changes of Hydroxyapatite Coated Ti Disc When Immersed in NaCl Solution

NaCl 수용액에 담근 Hydroxyapatite 코팅된 타이타늄 시편의 표면 변화

  • Received : 2012.10.05
  • Accepted : 2012.12.25
  • Published : 2012.12.30

Abstract

In previous studies, methods for enhancing cellular response on the Hydroxyapatite coated implant surface were described. In this study, the changes of surface characteristics such as surface roughness, contact angle, surface energy and surface morphology were observed when Hydroxyapatite coated Ti discs were immersed in NaCl solution for various time. Hydroxyapatite coated Ti discs were immersed in 0.9% NaCl solution for 7, 14 and 21 days at $37^{\circ}C$. The control group comprises dry identical discs not immersed in a solution. (n=3) All discs were dried in air completely and the surface roughness was measured using confocal laser scanning microscopy(CLSM). Static contact angle was recorded by video contact angle analyzer after dropping distilled water on the surface. The surface energy was calculated from contact angles of the three liquids. Surface was observed using a field emission-scanning electron microscope(FE-SEM). As a result, the surface roughness of immersed Hydroxyapatite coated Ti discs increased significantly and the contact angle decreased comparing with control group discs. The surface energy of immersed discs increased except for discs immersed for 14 days.

Keywords

contact angle;hydrophilicity;Hydroxyapatite coated implant;surface energy;surface roughness

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Acknowledgement

Supported by : Ministry of Health and Welfare