Synthesis and Characterization of Silicon Substituted Hydroxyapatite

Si을 함유하는 Hydroxyapatite의 합성 및 특성 분석

  • 김수룡 (요업기술원 세라믹·건재부) ;
  • 김영희 (요업기술원 세라믹·건재부) ;
  • 정상진 (요업기술원 세라믹·건재부) ;
  • 류도형 (요업기술원 나노세라믹센터)
  • Published : 2001.12.01

Abstract

A silicon-substituted hydroxyapatite was prepared using tetraethylorthosilicate as a silicon source to obtain a biomaterial having an improved biocompatibility. From the XRD analysis, it was confirmed that a single-phase hydroxyapatite containing silicon was formed without revealing the presence of extra phases related to silicon oxide or other calcium phosphate species. Silicon content was up to 3.32% by weight. Through $\^$29/Si MAS NMR investigation we could confirm the presence of tetrahedral silicate in the framework of hydroxyapatite structure. Substitution of silicon into the hydroxyapatite framework (Ca$\_$10/(PO$_4$)$\_$6-x/(SiO$_4$)$\_$x/(OH)$\_$2-x/ reduced the amount of hydroxyl group to compensate for the extra negative charge of the silicate group, which is confirmed by FT-IR.

생체친화성이 증진된 생체재료를 얻기 위하여 실리콘 원료로 tetraethyl orthosilicate를 사용하여 실리콘이 치환된 hydroxyapatite를 합성하였다. XRD 분석결과 규산이나 다른 인산칼슘염을 포함하지 않는 순수한 hydroxyapatite상 만이 존재하는 것을 확인할 수 있었다. 성분분석 결과 3.32wt% 까지의 실리콘을 함유하였다. $^{29}$ Si MAS NMR 데이터 분석결과 실리콘은 수산화아파타이트의 결정 내에서 규산염 사면체구조를 가지는 것으로 확인할 수 있었다. FT-IR 분석결과 Si 치환 수산화아파타이트에서 수산기가 감소되는 것은 silicate group의 음전하를 보상하기위한 것으로 사료되었다.

Keywords

References

  1. J. Am. Ceram. Soc. v.81 no.7 Bioceramics L.L. Hench
  2. J. Mater. Sci.;Mater. in Med. v.11 Morphological Study of Hydroxyapatite Nanocrystal Suspension E. Bouyer;F.Gitzhofer;M.I. Boulos
  3. J. Eur. Ceram. Soc. v.17 A new Systhesis of Hydroxyapatite W. Weng;J. L. Baptista
  4. J. Biomed. Mater. Res. v.44 no.4 Chemical Characterization of Silicon-substituted Hydroxyapatite I.R. Gibson;S.M. Best;W. Bonfield
  5. J. Biomed. Mater. Res. v.42 no.4 Influence of Magnesium Substituted on a Collagen-apatite Biomaterial on the Production of a Calcifying Matrix by Human Osteoblasts C.M. Serre;M. Papillard;P. Chavassieux;J.C. Voegel;G. Boivin
  6. WO 98-08773 Sillicon-substituted Apatites and Process for the Preparation Thereof S.M. Best;W.Bonfield;I.R. Gibson;L.J. Jha
  7. Bioceramics v.7 Dependence of Bone like Hydroxy-apatite Formation on Structure of Silica Gel T. Kokubo;S.B. Cho;K. Nakanishi;C. Ohtsuki;T. Kitsugi;T. Yamamuro;T. Nakmura
  8. J. Am. Ceram. Soc. v.8 Mechanism of Apatite Formation on a Sodium Glass in a Simulated Body Fluid S. Hayakawa;K. Tsuru;C. Ohtsuki;A. Osaka
  9. Science v.167 Silicon;A Possible Factor in Bone Calcification E.M. Carlisle
  10. J. Solid State Chem. v.78 Synthesis and Thermal Behavior of Well- crystallized Calcium-deficent Phosphate Apatite A. Mortier;J. Lemaitre:L. Rodrique;P.G. Rouxhet
  11. J. Phys. Chem. v.75 The Nature of Deficiency in Nonstoichiomeric Hydroxyapatite. Ⅱ. Spectroscopic Studies of Calcium and Strontinum Hydroxyapatites S.J. Joris;C.H. Amberg