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Related Experiment Videos

Development of novel elastomer/methacrylate monomer soft lining materials.

P D Riggs1, S Parker, M Braden

  • 1Department of Biomaterials in Relation to Dentistry, St. Bartholomew's and the Royal London School of Medicine and Dentistry, Queen Mary and Westfield College, Mile End Road, London, E1 4NS, UK.

Journal of Materials Science. Materials in Medicine
|September 7, 2004
PubMed
Summary

This study evaluated new denture soft lining materials, comparing butadiene/styrene (PBS) and isoprene/styrene (SIS) elastomers. SIS5+ showed superior tensile strength and lower oxidation, making it promising for denture applications.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Polymer Chemistry

Background:

  • A previous butadiene/styrene copolymer (PBS) formulation showed promise as a denture soft lining material.
  • High water uptake due to a separating agent limited its clinical applicability.
  • The need for improved denture soft lining materials necessitates investigation into alternative elastomers.

Purpose of the Study:

  • To compare the tensile and water absorption properties of four novel elastomers (three butadiene/styrene: HBS, EBS, SBS; one isoprene/styrene: SIS) without separating agents.
  • To evaluate these elastomers using the 5+ formulation for denture soft lining applications.
  • To identify elastomers with optimal mechanical properties, low water uptake, and resistance to oxidation.

Main Methods:

Related Experiment Videos

  • Four elastomers (HBS, EBS, SBS, SIS) were formulated with ethyl hexyl methacrylate (5+ formulation) without separating agents.
  • Tensile properties and water absorption were measured for all formulations, including a reference PBS5+.
  • Polymerization methods (emulsion vs. solution) and signs of oxidation were assessed.

    • Main Results:

    • Isoprene/styrene (SIS5+) exhibited superior tensile properties compared to other formulations.
    • Hydrophilic groups in solution-polymerized elastomers (EBS, EBS, SIS) led to higher water uptake than PBS5+.
    • Emulsion-polymerized HBS5+ showed the lowest water uptake but was deemed less suitable for medical use.
    • All tested materials displayed some degree of oxidation.

    Conclusions:

    • SIS5+ demonstrates the most favorable combination of mechanical properties and oxidation resistance among the evaluated elastomers.
    • While HBS5+ had low water uptake, its emulsion polymerization process is less desirable for medical applications.
    • SIS5+ is identified as the most suitable candidate for further development as a denture soft lining material.