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Light-weight ocular prosthesis

R Brito Edias1, J R Rezende, J C Carvalho

  • 1Disciplina de Protese Buco-Maxilo-Facial, Universidade de Sao Paulo, Brasil.

Brazilian Dental Journal
|January 1, 1994
PubMed
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This study introduces a lighter ocular prosthesis by adding styrofoam to acrylic resin, improving patient mobility and aesthetics. The new method also offers faster manufacturing and easier material handling.

Area of Science:

  • Ophthalmology
  • Biomaterials Science
  • Prosthetics Engineering

Background:

  • Ocular prostheses are used to replace eyes in large ophthalmic cavities.
  • Current prostheses can be heavy, impacting patient comfort, mobility, and aesthetics.
  • Existing manufacturing techniques for hollow ocular prostheses have limitations.

Purpose of the Study:

  • To present a modified technique for creating ocular prostheses for large cavities.
  • To reduce the weight of ocular prostheses using expanded polystyrene (styrofoam).
  • To evaluate the physical properties of prostheses made with the new technique.

Main Methods:

  • A novel technique incorporating expanded polystyrene into acrylic resin during sclera fabrication was developed.
  • Prostheses were fabricated using the proposed technique and compared to traditional hollow ocular prosthesis techniques.

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  • Key properties assessed included weight, water absorption, and resistance to rupture under hydrostatic pressure.

    • Main Results:

    • The proposed technique resulted in significantly lighter ocular prostheses compared to conventional methods.
    • Prostheses manufactured using the new technique demonstrated comparable or improved resistance to rupture.
    • The study found advantages in reduced manufacturing time and improved material handling with the styrofoam-enhanced acrylic resin.

    Conclusions:

    • The incorporation of expanded polystyrene into acrylic resin is a viable method for producing lighter ocular prostheses.
    • This innovation enhances patient comfort, mobility, and aesthetic outcomes.
    • The modified technique offers practical benefits for prosthetists, including efficiency and ease of use.