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Journal of Medical and Biological Engineering

, Volume 37, Issue 6, pp 879–886 | Cite as

A Feasibility Study Regarding the Potential Use of Silica-Doped Calcium Sulfate Anhydrite as a Bone Void Filler

  • Man-Ping Chang
  • Hsiu-Ching Hsu
  • Wei-Hsing Tuan
  • Po-Liang Lai
Original Article

Abstract

In the present study, the feasibility of using calcium sulfate anhydrite (CaSO4) pellets as bone void filler is evaluated. The calcium sulfate anhydrite pellets are prepared by dry-pressing calcium sulfate hemihydrate powder, then sintering at elevated temperatures. The remaining porosity within anhydrite pellets is only 7% after sintering at 1000 °C. The growth of CaSO4 grains during sintering is very fast. The addition of a small amount of silica (SiO2), <1 wt%, can prevent the coarsening of anhydrite grains during sintering. The microstructure refinement may be related to the formation of CaSiO3 particles at the boundaries of the CaSO4 grains. The SiO2-doped anhydrite pellets thus exhibit higher compressive strength. Moreover, the degradation of SiO2-doped anhydrite pellets is slower than that of anhydrite pellets. The slow degradation rate is likely attributable to the dissolution of minute amounts of SiO2 in CaSO4.

Keywords

Bone void filler Calcium sulfate Degradation Sintering 

Notes

Acknowledgements

The present study was supported by the Ministry of Science and Technology and Chang Gung Memorial Hospital through contract numbers MOST 103-2221-E-002-077, CMRPG3E0681 and CMRPG3E0682. The technical assistance of Ms. Yi-Chun Tsung (NTU), Mr. Hao-Wei Wu (NTU), Dr. Shu-Ting Kuo (NTU) and Ms. Louisa Wu (CGMH) is greatly appreciated.

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Copyright information

© Taiwanese Society of Biomedical Engineering 2017

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringNational Taiwan UniversityTaipeiTaiwan
  2. 2.Department of Orthopedic Surgery, Bone and Joint Research Center, Chang Gung Memorial Hospital at Linkou, College of MedicineChang Gung UniversityTaoyuanTaiwan

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