한국결정성장학회지 (Journal of the Korean Crystal Growth and Crystal Technology)

  • 제32권5호
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  • Pages.191-198
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  • 2022
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  • 1225-1429(pISSN)
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  • 2234-5078(eISSN)
한국결정성장학회 (The Korea Association of Crystal Growth)
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고상반응법에 의한 아커마나이트 분말의 합성 및 생체활성도 평가

Synthesis of akermanite bioceramics by solid-state reaction and evaluation of its bioactivity

  • 고재은 (조선대학교 첨단소재공학과) ;
  • 이종국 (조선대학교 첨단소재공학과)
  • Go, Jaeeun (Department of Advanced Materials and Engineering, Chosun University) ;
  • Lee, Jong Kook (Department of Advanced Materials and Engineering, Chosun University)
  • 투고 : 2022.09.27
  • 심사 : 2022.10.07
  • 발행 : 2022.10.31
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초록

치과용 임플란트 재료로 주로 사용되는 지르코니아 및 티타늄 합금은 생체불활성 특징으로 인하여 골유착 및 골형성 능력이 떨어진다. 이러한 문제를 쉽고 간단하게 해결하기 위한 방법으로는 생체활성 물질을 표면에 코팅하여 생체 활성을 높이는 방법이 있다. 본 연구에서는 우수한 골결합 능력을 가진 실리케이트계 세라믹인 아커마나이트(Ca2MgSi2O7)를 고상반응법으로 합성하고, SBF 용액 내 침적실험을 통하여 합성 아커마나이트 분말의 생체활성을 분석하였다. 고상반응 출발원료로는 탄산칼슘(CaCO3), 탄산마그네슘(MgCO3), 이산화규소(SiO2) 분말을 사용하였다. 분말을 혼합 및 건조한 후, 가압 성형하여 디스크 형태로 만든 후, 고상반응 온도를 변화시키며 아커마나이트 상의 합성을 유도하였다. 합성된 아커마나이트 펠릿의 용해 및 생체활성 분석을 위하여 SBF 용액 내 침적 시키고, 침적시간에 따라 아커마나이트의 표면 용해 및 하이드록시아파타이트 석출을 분석하였다. 합성반응 온도가 높아질수록 아커마나이트 상이 뚜렷하게 나타난 반면에, SBF 용액 내 용해는 천천히 진행되었다. 합성된 아커마나이트 분말의 생체활성도는 대체적으로 우수하였으나, 그 중에서도 1100℃에서 고상반응 하여 합성한 분말에서 적절한 용해 및 하이드록시아파타이트 입자의 석출이 잘 일어나는 것으로 분석되었다.

Zirconia and titanium alloys, which are mainly used for dental implant materials, have poor osseointegration and osteogenesis abilities due to their bioinertness with low bioactivity on surface. In order to improve their surface bioinertness, surface modification with a bioactive material is an easy and simple method. In this study, akermanite (Ca2MgSi2O7), a silicate-based bioceramic material with excellent bone bonding ability, was synthesized by a solid-state reaction and investigated its bioactivity from the analysis of surface dissolution and precipitation of hydroxyapatite particles in SBF solution. Calcium carbonate (CaCO3), magnesium carbonate (MgCO3), and silicon dioxide (SiO2) were used as starting materials. After homogeneous mixing of starting materials by ball milling and the drying of at oven, uniaxial pressing was performed to form a compacted disk, and then heat-treated at high temperature to induce the solid-state reaction to akermanite. Bioactivity of synthesized akermanite disk was evaluated with the reaction temperature from the immersion test in SBF solution. The higher the reaction temperature, the more pronounced the akermanite phase and the less the surface dissolution at particle surface. It resulted that synthesized akermanite particles had high bioactivity on particle surface, but it depended on reacted temperature and phase composition. Moderate dissolution occurred at particle surfaces and observed the new precipitated hydroxyapatite particles in synthetic akermanite with solid-state reaction at 1100℃.

키워드

과제정보

본 연구는 2021년도 조선대학교 연구비 지원에 이루어졌음.

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