The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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The effect of different crystallization temperature of the hydroxyapatite coating produced by ion beam-assisted deposition on anodizing-treated titanium disks on human osteosarcoma cells

양극산화처리된 티타늄 표면에 이온빔보조증착방식을 이용한 수산화인회석 코팅시 소결온도의 차이가 조골세포에 미치는 영향

  • Pae, Ah-Ran (Department of Prosthodontics, School of Dentistry, Kyung Hee University) ;
  • Won, Hyun-Du (Department of Prosthodontics, School of Dentistry, Kyung Hee University) ;
  • Lee, Richard Sung-Bok (Department of Prosthodontics, School of Dentistry, Kyung Hee University) ;
  • Kim, Hyeong-Seob (Department of Prosthodontics, School of Dentistry, Kyung Hee University) ;
  • Woo, Yi-Hyung (Department of Prosthodontics, School of Dentistry, Kyung Hee University)
  • 배아란 (경희대학교 치의학전문대학원 보철학교실) ;
  • 원현두 (경희대학교 치의학전문대학원 보철학교실) ;
  • 이성복 (경희대학교 치의학전문대학원 보철학교실) ;
  • 김형섭 (경희대학교 치의학전문대학원 보철학교실) ;
  • 우이형 (경희대학교 치의학전문대학원 보철학교실)
  • Received : 2011.10.12
  • Accepted : 2011.10.24
  • Published : 2011.10.31
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Abstract

Purpose: The aim of this study was to study the effect of hydroxyapatite (HA) coating crystallinity on the proliferation and differentiation of human osteosarcoma cells. Materials and methods: Surface roughness of the titanium disks increased by anodizing treatment and then HA was coated using ion beam-assisted deposition (IBAD). HA coating was crystallized by heat-treated at different temperature ($100^{\circ}C$, $300^{\circ}C$, $500^{\circ}C$, $800^{\circ}C$). According to the temperature, disks were divided into four groups (HA100, HA300, HA500, HA800). With the temperature, crystallinity of the HA coating was different. Anodized disks were used as control group. The physical properties of the disk surface were evaluated by surface roughness tests, XRD tests and SEM. The effect of the crystallinity of HA coating on HOS cells was studied in proliferation and differentiation. HOS cells were cultured on the disks and evaluated after 1, 3, 5, and 7 days. Growth and differentiation kinetics were subsequently investigated by evaluating cell proliferation and alkaline phosphatase activity. Results: Regardless of the heat-treated temperature, there is no difference on the surface roughness. Crystallinity of the HA was appeared in the groups of HA500, HA800. HOS cells proliferation, ALP activity were higher in HA500 and HA800 group than HA100 and HA300. Conclusion: Within the results of this limited study, heat treatment at $500^{\circ}C$ of HA coating produced by IBAD has shown greater effect on proliferation and differentiation of HOS cells. It is considered that further in vivo study will be necessary.

연구 목적: 이 연구의 목적은 수산화인회석 코팅 결정도가 조골세포의 분화에 미치는 영향을 조사하기 위함이다. 연구 재료 및 방법: 제작된 모든 시편은 양극산화과정을 거치면서 티타늄 표면에서 산화막을 형성하여 표면 거칠기를 증가시켰고 각 시편의 표면을 IBAD (ion beam-assisted deposition) 시스템을 이용하여 HA (hydroxyapatite) 코팅하였다. HA의 코팅이 완료된 시편들은 전기가열로(AJ-SB3, AJEON Heating Industrial Co., Ltd, Seoul, Korea)에 넣어 각 실험군별로 $100^{\circ}C$, $300^{\circ}C$, $500^{\circ}C$, $800^{\circ}C$까지 온도를 상승시켜 열처리하였다. HA 코팅을 실시하지 않은 군은 대조군으로 설정하고(control) 소결된 각각의 그룹은 HA100, HA300, HA500, HA800으로 구분하여 설정하였다. 시편 표면의 물리적 성질은 표면 거칠기 테스트, XRD, SEM으로 평가되었다. 수산화인회석 코팅의 결정도의 효과는 조골세포의 분화에 의해 연구되었는데 1, 3, 5, 7일 후에 평가되었다. 성장과 분화 역학은 세포증식능평가, ALP (alkaline phosphatase) 활성능 평가에 의해 조사되었다. 결과: 표면 거칠기는 양극산화 처리 후 IBAD 방식으로HA를 코팅하여도 그 거칠기에는 별 다른 차이가 없음을 보였다. X선 회절분석 결과 $100^{\circ}C$와 $300^{\circ}C$에서 소결한 시편은 HA의 결정화가 없는 무정형상태이며 $500^{\circ}C$와 $800^{\circ}C$에서 소결한 시편의 HA에서는 결정화 상태가 나타났다. 표면에 배양된 조골 세포의 증식능을 측정한 결과 1일과 3일에서는 각 실험군간의 유의할만한 차이가 있었으나, 5일과 7일에는 각 대조군과 실험군 모두 유의성 있는 차이를 보이지 않았다. ALP 활성능은 HA100과 HA300보다 HA500과 HA800이 더 높았다. 결론: 본 연구의 결과에서 양극산화처리된 티타늄표면에 이온빔보조증착법을 이용하여 수산화인회석을 코팅 후 소결할 때 $500^{\circ}C$의 소결온도가 수산화인회석코팅층의 결정화와 HOS (human osteosarcoma cells) 세포의 증식과 분화에 효과가 좋은 것으로 나타났다.

Keywords

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