J Adv Prosthodont.  2009 Mar;1(1):1-5. 10.4047/jap.2009.1.1.1.

Wettability of denture relining materials under water storage over time

• Jin NY
• Lee HR
• Lee H
• Pae A

• KMID: 2176330
• DOI: http://doi.org/10.4047/jap.2009.1.1.1

Abstract

STATEMENT OF PROBLEM: Poor wettability of denture relining materials may lead to retention problems and patient discomfort. PURPOSE: Purpose of this study is to compare and evaluate wettability of nine denture relining materials using contact angle measurements under air and water storage over time. MATERIAL AND METHODS: Nine denture relining materials were investigated in this study. Two heat-curing polymethyl-methacrylate (PMMA) denture base materials: Vertex RS, Lang, one self-curing polyethyl-methacrylate (PEMA) chairside reline resin: Rebase II, six silicone relining materials: Mucopren soft, Mucosoft, Mollosil(R) plus, Sofreliner Touch, GC Reline(TM) Ultrasoft, Silagum automix comfort were used in this experiment. Contact angles were measured using high-resolution drop shape analysis system (DSA 10-MK2, KRUESS, Germany) under three conditions (in air after setting, 1 hour water storage, and 24 hours water storage). Nine materials were classified into three groups according to material composition (Group 1: PMMA, Group 2: PEMA, Group 3: Silicone). Mean values of contact angles were compared using independent samples t-test and one-way ANOVA, followed by a Scheffe's post hoc analysis (alpha= 0.01). RESULTS: Contact angles of materials tested after air and water storage increased in the following order: Group 1 (PMMA), Group 2 (PEMA), Group 3 (Silicone). Heat-cured acrylic denture base resins had more wettability than silicone relining materials. Lang had the highest wettability after 24 hours of water storage. Silicone relining materials had lower wettability due to their hydrophobicity. Wettability of all denture relining materials, except Rebase II and Mollosil(R) plus, increased after 24 hours of water storage. CONCLUSIONS: Conventional heat-cured resin showed the highest wettability, therefore, it can be suggested that heat-cured acrylic resin is material of choice for denture relining materials.

Keyword

Denture relining materials; Wettability; Contact angle; Drop shape analysis

MeSH Terms

Denture Bases
Denture Rebasing
Dentures
Humans
Hydrophobic and Hydrophilic Interactions
Polymethyl Methacrylate
Retention (Psychology)
Silicones
Water
Wettability
Polymethyl Methacrylate
Silicones
Water

Figure

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  Fig. 1 Schematic illustration of high-resolution Drop Shape Analysis System. A. Table, B. Specimen, C. Liquid Syringe System, D. Liquid Container, E. Light, F. High-resolution Video Camera, G. Computer, H. Monitor.

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  Fig. 2 Bar graph of contact angles of denture relining materials.

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  Fig. 3 Line graph of contact angles of denture relining materials over time.

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