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The disinfection of impression materials by using microwave irradiation and hydrogen peroxide

Authors
 Yu-Ri Choi  ;  Kyoung-Nam Kim  ;  Kwang-Mahn Kim 
Citation
 JOURNAL OF PROSTHETIC DENTISTRY, Vol.112(4) : 981-987, 2014 
Journal Title
JOURNAL OF PROSTHETIC DENTISTRY
ISSN
 0022-3913 
Issue Date
2014
MeSH
Bacterial Load/drug effects ; Bacterial Load/radiation effects ; Bacteriological Techniques ; Calcium Sulfate/chemistry ; Dental Disinfectants/therapeutic use* ; Dental Impression Materials/chemistry* ; Dental Impression Materials/radiation effects ; Dental Stress Analysis/instrumentation ; Disinfection/methods* ; Escherichia coli/drug effects ; Escherichia coli/radiation effects ; Humans ; Hydrogen Peroxide/therapeutic use* ; Materials Testing ; Microwaves/therapeutic use* ; Polyvinyls/chemistry ; Polyvinyls/radiation effects ; Radiation Dosage ; Siloxanes/chemistry ; Siloxanes/radiation effects ; Streptococcus mutans/drug effects ; Streptococcus mutans/radiation effects ; Stress, Mechanical ; Surface Properties ; Temperature ; Tensile Strength ; Time Factors ; Wettability
Abstract
STATEMENT OF PROBLEM:
Microwave irradiation and immersion in solutions have been recommended for denture disinfection. However, the effect of dry conditions and impression materials has not been completely evaluated.
PURPOSE:
The purpose of this study was to evaluate the effectiveness of microwave irradiation and hydrogen peroxide for the disinfection of dental impression materials.
MATERIAL AND METHODS:
Specimens (diameter 10 mm, thickness 2 mm) were made with polyvinyl siloxane. Experimental groups were treated with hydrogen peroxide (group H), microwave irradiation (group M), and a combination of both hydrogen peroxide and microwave irradiation (group MH) for 1 minute, 2 minutes, and 3 minutes. The control group was untreated. The total sample size was 120. The specimens were divided into 2 groups, those exposed to Streptococcus mutans and those exposed to Escherichia coli. The disinfection effect and physical properties (contact angle, compatibility with gypsum, strain in compression, tear strength) were evaluated.
RESULTS:
All 3 groups (H, M, MH) were effective in reducing the number of colony forming units (CFU) per unit volume (mL) for both S mutans and E coli compared with the control. The most significant reduction in the CFU/mL of both bacteria was noted in the MH group and was used to compare either treatment alone (P<.05). No statistically significant difference was noted between the control and treatment groups in terms of all of the physical properties tested (P>.05).
CONCLUSIONS:
Microwave irradiation was identified as a useful disinfection method against S mutans and E coli, especially when combined with H2O2, without adversely affecting the physical properties of dental impression materials.
Full Text
http://www.sciencedirect.com/science/article/pii/S0022391314001127
DOI
10.1016/j.prosdent.2013.12.017
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyoung Nam(김경남)
Kim, Kwang Mahn(김광만) ORCID logo https://orcid.org/0000-0002-5235-0294
Choi, Yu Ri(최유리)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/100082
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