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Related Experiment Videos

A new polyisoprene-based light-curing denture soft lining material.

Iwao Hayakawa1, En-Sheng Keh, Masayuki Morizawa

  • 1Department of Complete Denture Prosthodontics Graduate School, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8549, Tokyo, Japan. i.hayakawa.ore@tmd.ac.jp

Journal of Dentistry
|May 9, 2003
PubMed
Summary

Clearfit LC, a new polyisoprene soft lining material, exhibits low water sorption, high stain resistance, and good bond strength. Its light-curing property offers clinicians valuable working time, making it a promising alternative reline material.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering

Background:

  • Soft lining materials are crucial for denture comfort and function.
  • Evaluating new materials like polyisoprene-based Clearfit LC is essential for improving denture care.

Purpose of the Study:

  • To assess the clinical properties of Clearfit LC, a novel polyisoprene-based light-curing soft lining material.
  • To compare Clearfit LC's performance against established plasticised acrylic and silicone soft lining materials.

Main Methods:

  • Five soft lining materials were tested: Clearfit LC, two plasticised acrylics, and two silicones.
  • Key properties evaluated included water sorption, solubility, staining resistance, Shore A hardness, and shear bond strength to denture base resin.
  • Statistical analysis involved one-way ANOVA and Scheffe's post-hoc test at alpha=0.05.

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Main Results:

  • Clearfit LC demonstrated intermediate water sorption and solubility.
  • It exhibited superior staining resistance against beta-carotene/olive oil and instant coffee solutions.
  • The material showed satisfactory shear bond strength (1.56MPa) with no adhesive failure and moderate Shore A hardness (56.2).

Conclusions:

  • The polyisoprene-based Clearfit LC offers a favorable combination of low water sorption, high stain resistance, and adequate bond strength.
  • Its light-curing capability provides clinicians with extended working time.
  • Clearfit LC presents a viable and attractive option for denture relining applications.