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Related Experiment Videos

Cell responses to Hydron by a new in-vitro method.

J R McNamara1, G S Heithersay, O W Wiebkin

  • 1The University of Adelaide, South Australia.

International Endodontic Journal
|July 1, 1992
PubMed
Summary

This study developed an in-vitro biotoxicity test system to assess endodontic filling materials. Polymerizing Hydron showed significant cell inhibition, similar to Tubliseal, while AH26 was less cytotoxic.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Dental Materials

Background:

  • Endodontic filling materials require rigorous biotoxicity assessment.
  • Existing testing methods may not fully capture cellular responses to these materials.

Purpose of the Study:

  • To develop and validate an in-vitro biotoxicity test system for endodontic filling materials.
  • To evaluate the cellular responses of Hydron, AH26, and Tubliseal using this novel system.

Main Methods:

  • Utilized a stable L-cell line cultured on Millipore filters as indicator cells.
  • Exposed confluent cell cultures to endodontic materials (Hydron, AH26, Tubliseal) for 24 hours.
  • Measured cell division (3H-thymidine incorporation) and matrix synthesis (35S-sulphate) to assess biotoxicity.

Main Results:

  • Freshly mixed polymerizing Hydron significantly inhibited cell division (89%) and matrix synthesis (94%).
  • Prepolymerized Hydron showed less inhibition (59% and 56%, respectively).
  • Tubliseal exhibited similar cytotoxicity to polymerizing Hydron, while AH26 demonstrated lower toxicity, comparable to prepolymerized Hydron.

Conclusions:

  • The developed in-vitro system effectively differentiates the biotoxicity of endodontic filling materials.
  • Polymerizing Hydron and Tubliseal exhibit higher cytotoxicity compared to AH26.
  • Further investigation into material formulations and their long-term cellular effects is warranted.

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