Development of a nondestructive compliance test for resilient denture liners

Igor J. Pesun, Anamaria Villar, James S. Hodges, Ralph DeLong, Juey H. Lai, Donald Schneider

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Purpose: Resilient denture liners are prescribed for patients who cannot adjust to hard-based dentures because of a thin mucosa or severe alveolar ridge resorption. A nondestructive test to evaluate compliance of new soft liner materials will be useful in clinical trials. The purpose of this study was to evaluate a nondestructive compliance testing technique designed to characterize long-term, silicone-based resilient denture liner materials. Materials and Methods: Samples of thicknesses of 1.1, 2.2, 3.3, and 4.4 mm of 2 materials (MPDS-SL [Lai Laboratories, Inc, Burnsville, MN] and Molloplast-B [Buffalo Dental, New York, NY]) were assessed for compliance using a closed-loop servohydraulic testing system, applying a 3 lb force following a squarewave pattern; force and position values were recorded using a storage oscilloscope. The oscilloscope values were analyzed using computer software to determine compliance values. The effect of material thickness was examined by testing wedges of the 2 materials. Results: The testing technique used showed that differing thicknesses had significantly different compliance values (p < .0001). In the materials used to evaluate the technique, MPDS-SL behaved more elastically than did Molloplast-B (p < .0001). Material thicknesses beyond 2.2 mm did not increase compliance, although MPDS-SL had a steeper thickness-compliance curve than Molloplast-B. Conclusions: The method used to test compliance proved to be sufficiently sensitive to distinguish between 2 materials and between varying thicknesses. The sensitivity and nondestructive nature of this test show its suitability for clinical evaluation of resilient denture liners.

Original languageEnglish (US)
Pages (from-to)91-96
Number of pages6
JournalJournal of Prosthodontics
Volume10
Issue number2
DOIs
StatePublished - Jun 2001

Keywords

  • Acrylic-based resilient denture liners
  • Complete mandibular dentures
  • Compliance testing
  • Elasticity
  • Silicone-based resilient denture liners
  • Viscoelasticity

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