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Basic studies on hydroxy apatite cement: I. Setting reaction

Y Fukase1, S Wada, H Uehara

  • 1Department of Dental Materials, Nihon University School of Dentistry, Tokoyo, Japan.

Journal of Oral Science
|July 29, 1998
PubMed
Summary
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New calcium phosphate cements, alpha D-Cement and alpha DT-Cement, set and harden to form hydroxyapatite. These bone-like materials show promise for oral surgery applications.

Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Calcium Phosphate Chemistry

Background:

  • Calcium phosphates are key mineral components of teeth and bones.
  • Development of biocompatible and bioresorbable bone-filling materials is crucial for regenerative medicine.
  • Self-setting cements offer advantages in surgical applications due to their ease of use.

Purpose of the Study:

  • To prepare and characterize novel self-setting calcium phosphate cements, alpha D-Cement and alpha DT-Cement.
  • To evaluate the setting properties and reaction products of these cements.
  • To assess their potential utility as bone-filling materials in oral surgery.

Main Methods:

  • Preparation of alpha D-Cement and alpha DT-Cement using specific calcium phosphate powders (alpha-TCP, TTCP, DCPA).

Related Experiment Videos

  • Assessment of cement reaction and hardening in a moist environment at 37°C.
  • Powder X-ray diffraction (XRD) analysis to monitor reaction conversion over time.

    • Main Results:

    • Both alpha D-Cement and alpha DT-Cement successfully reacted and hardened, producing hydroxyapatite.
    • Optimal powder/liquid ratios were determined: 2.0 for alpha D-Cement and 1.8 for alpha DT-Cement.
    • Initial setting times were recorded as 87.5 minutes for alpha D-Cement and 107.5 minutes for alpha DT-Cement.

    Conclusions:

    • Alpha D-Cement and alpha DT-Cement are effective self-setting calcium phosphate cements.
    • The formation of hydroxyapatite, a mineral found in natural bone and teeth, is a key reaction product.
    • These cements demonstrate significant potential for use as biocompatible bone-filling materials in oral surgery.