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

5 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

Bibliographical note

Funding Information:
From the University of Minnesota, Minneapolis, MN. 1Assistant Professor, Division of Prosthodontics, Department of Restorative Sciences, School of Dentistry. 2Student, School of Dentistry. 3Senior Research Associate, Division of Biostatistics, School of Public Health. 4Professor, Department of Oral Science, School of Dentistry. From Lai Laboratories Inc, Burnsville, MN. 5President. 6Scientist. Accepted May 31, 2001. This study was supported by a grant from the University of Minnesota School of Dentistry Summer Research Fellowship Program NIH/NIDCR T35-DE07098, NIH/NIDCR 2R44DE11638-02, NIH/NIDCR P30- DE09737, and the Minnesota Dental Research Center for Biomaterials and Biomechanics. The substance of this report was delivered at the general session of the International Association for Dental Research, Washington, DC, April 2000. One of the resilient denture liners tested in this article was produced by Lai Laboratories. The author Juey Lai is the President of Lai Laboratories and Donald Schneider is an employee. The remaining authors have no financial interest in Lai Laboratories. Correspondence to: Igor J. Pesun, DMD, MS, 9-450B Malcolm Moos Health Sciences Tower, 515 Delaware Street, SE, Minneapolis, MN 55455. E-mail: [email protected] Copyright © 2001 by The American College of Prosthodontists 1059-941X/01/1002-0005$35.00/0 doi:10.1053/jpro.2001.26674

Keywords

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

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