In Vitro Study on Changes in the Stress Behavior under Simulated Mucosa Exposed to Denture Bases with Different Resilient Denture Liners

• Yamamoto Shiro

  Department of Gnatho-Oral Prosthetic Rehabilitation, School of Dentistry at Matsudo, Nihon University, Research Institute of Oral Science, School of Dentistry at Matsudo, Nihon University

• Kimoto Suguru

  Department of Gnatho-Oral Prosthetic Rehabilitation, School of Dentistry at Matsudo, Nihon University, Research Institute of Oral Science, School of Dentistry at Matsudo, Nihon University

• Saeki Hiroyuki

  Department of Gnatho-Oral Prosthetic Rehabilitation, School of Dentistry at Matsudo, Nihon University, Research Institute of Oral Science, School of Dentistry at Matsudo, Nihon University

• So Kunio

  Department of Gnatho-Oral Prosthetic Rehabilitation, School of Dentistry at Matsudo, Nihon University, Research Institute of Oral Science, School of Dentistry at Matsudo, Nihon University

• Shinomiya Mayako

  Department of Gnatho-Oral Prosthetic Rehabilitation, School of Dentistry at Matsudo, Nihon University, Research Institute of Oral Science, School of Dentistry at Matsudo, Nihon University

• Kobayashi Kihei

  Department of Research Center, Nihon University

Bibliographic Information

Other Title

• 軟質リライン材の違いによる床下疑似粘膜下の圧力動態の変化に関する研究

Abstract

Purpose: The aim of the current study was to reveal the stress behavior under simulated mucosa exposed to dentures fitted with resilient denture liners as well as to explain, at least in part, the cause of the prolonged occluding phase observed in edentulous patients who wear complete dentures fitted with resilient denture liners.<br>Materials and Methods: A cylindrical metal rod weighing 100 g was dropped perpendicularly onto the samples from a height of 3 cm. The samples were placed on simulated mucosa constructed from a silicone impression material; they were 1.5 mm-thick and contained a pressure sensor of diameter 2 mm in their lower regions. Samples of diameter 6 mm and thickness 2 mm were prepared from conventional denture base resin and fitted with 2-mm-thick resilient denture liners. A total of one acrylic-based (PSR) and two silicone-based (SLT and SLMS) resilient denture liners were used. Output signals were transmitted by the stress sensor through a sensor interface to a personal computer. The signals were sampled at a rate of 1 kHz. The following three parameters were used for assessing the observed stress behavior: maximum stress, time required to reach maximum stress, and stress-propagation speed. MANOVA, ANOVA, and Bonferroni post hoc test were used for statistical analysis (α = 0.05).<br>Results: The relationships of the magnitudes of the abovementioned parameters were as follows: maximum stress, control: PSR ⟩ SLT ⟩ SLMS; time required to reach maximum stress: SLT, SLMS ⟩ control, PSR; and stress-propagation speed: control, PSR ⟩ SLT, SLMS.<br>Conclusion: On being subjected to the shock load, the silicone-based resilient denture liners showed lower maximum stress, took longer to reach maximum stress, and exhibited slower stress-propagation speeds compared to the findings obtained using the acrylic-based resilient denture liners.

Journal

• Annals of Japan Prosthodontic Society

  Annals of Japan Prosthodontic Society 1 (3), 277-283, 2009

  Japan Prosthodontic Society

Keywords

• complete denture
• resilient denture liner
• stress behavior

Details

• CRID: 1390282680275940480
• NII Article ID: 10029764697
• NII Book ID: AA12374568
• DOI: 10.2186/ajps.1.277
• ISSN: 18836860
• ISSN: 18834426
• Web Site: http://www.jstage.jst.go.jp/article/ajps/1/3/1_3_277/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2009299280
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed