Time-related wettability characteristic of acrylic resin surfaces treated by glow discharge

Date
1999-12
Advisor
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Co-Advisor
Co-Supervisor
Instructor
Source Title
Journal of Prosthetic Dentistry
Print ISSN
0022-3913
Electronic ISSN
Publisher
Elsevier
Volume
82
Issue
6
Pages
680 - 684
Language
English
Type
Article
Journal Title
Journal ISSN
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Abstract

STATEMENT OF PROBLEM: Adhesion and cohesion have important roles in denture retention, and attempts have been made to improve the wettability of the acrylic resin material by surface treatments. PURPOSE: This study examined the initial and subsequent wettability of an acrylic resin denture base material treated under air or argon plasma atmosphere before and after exposure to air or distilled water. MATERIAL AND METHODS: Acrylic resin specimens were treated with plasma under air or argon atmosphere and were either exposed to air or distilled water for up to 60 days. Wettability characteristics of the acrylic resin specimens were determined by contact-angle measurements after 2 hours and after 60 days. Surface composition of the specimens also was analyzed with x-ray photoelectron spectroscopic (XPS) measurements. RESULTS: Statistically significant difference was found between control and each of the plasma treatment groups (P <.05). Although the storage condition and storage period caused statistically significant difference on contact angle values (P <.05), atmosphere type did not have any effect on the results (P >.05). XPS spectra of the plasma-treated specimens differed from control specimens only in the O1s region with a narrower and more intense peak that could be assigned to -COH groups. During 60 days of exposure, the O/C atomic ratios decreased within the first 2 weeks but settled to 0.40 and 0. 32 up to 60 days compared with 0.26 for untreated control specimens. CONCLUSION: Glow discharge plasma altered the surfaces of the acrylic resin and increased thc wettability as shown both by XPS and contact-angle measurements, and plasma treatment seemed to offer a durable (at least up to 60 days) wettability.

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Keywords
Acrylic acid resin, Argon, Air, Analysis of variance, Chemistry, Comparative study, Denture, Electrochemistry, Electron probe microanalysis, Materials testing, Time, Wettability
Citation
Published Version (Please cite this version)