Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer

Silicone elastomers are extensively used in maxillofacial prosthesis fabrication to rehabilitate craniofacial defects. The exposure to local weather conditions can influence the average service life of a silicone elastomer. It is observed in clinical practice that hot and humid weather further af...

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主要作者: Amin, Mehedi
格式: Thesis
語言:English
出版: 2021
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在線閱讀:http://eprints.usm.my/54517/1/MEHEDI%20AMIN%20-FINAL%20THESIS%20P-SGM002217%28R%29%20PWD_-24%20pages.pdf
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spelling my-usm-ep.545172022-09-07T01:39:10Z Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer 2021-10 Amin, Mehedi RK Dentistry Silicone elastomers are extensively used in maxillofacial prosthesis fabrication to rehabilitate craniofacial defects. The exposure to local weather conditions can influence the average service life of a silicone elastomer. It is observed in clinical practice that hot and humid weather further affects the durability of silicone material in terms of surface degradation and tear, thus requiring regular prosthesis replacement. Therefore, this study aimed to evaluate the surface roughness, tensile strength, and percentage elongation of different pigmented silicone elastomers subjected to outdoor weathering in the Malaysian environment. An in-vitro experimental study was performed on 120 type-II dumbbell-shaped specimens (non-weathered=60, weathered=60) made from three room temperature vulcanized (A-2000, A-2006) (Factor II, Inc., AZ, USA) materials. For 6 months, weathered specimens were subjected to outdoor weathering in customized exposure rack, while the non-weathered specimens were kept in a dehumidifier at 25°C ± 1°C and 50 ± 5% relative humidity. Afterward, surface roughness was measured using a profilometer (Surfcom Flex, Tokyo, Japan) whilst tensile strength and percentage elongation was determined using Universal Testing Machine (Shimadzu, Japan). Independent t-test was performed to compare the means of the tested 2021-10 Thesis http://eprints.usm.my/54517/ http://eprints.usm.my/54517/1/MEHEDI%20AMIN%20-FINAL%20THESIS%20P-SGM002217%28R%29%20PWD_-24%20pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Pergigian
institution Universiti Sains Malaysia
collection USM Institutional Repository
language English
topic RK Dentistry
spellingShingle RK Dentistry
Amin, Mehedi
Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer
description Silicone elastomers are extensively used in maxillofacial prosthesis fabrication to rehabilitate craniofacial defects. The exposure to local weather conditions can influence the average service life of a silicone elastomer. It is observed in clinical practice that hot and humid weather further affects the durability of silicone material in terms of surface degradation and tear, thus requiring regular prosthesis replacement. Therefore, this study aimed to evaluate the surface roughness, tensile strength, and percentage elongation of different pigmented silicone elastomers subjected to outdoor weathering in the Malaysian environment. An in-vitro experimental study was performed on 120 type-II dumbbell-shaped specimens (non-weathered=60, weathered=60) made from three room temperature vulcanized (A-2000, A-2006) (Factor II, Inc., AZ, USA) materials. For 6 months, weathered specimens were subjected to outdoor weathering in customized exposure rack, while the non-weathered specimens were kept in a dehumidifier at 25°C ± 1°C and 50 ± 5% relative humidity. Afterward, surface roughness was measured using a profilometer (Surfcom Flex, Tokyo, Japan) whilst tensile strength and percentage elongation was determined using Universal Testing Machine (Shimadzu, Japan). Independent t-test was performed to compare the means of the tested
format Thesis
qualification_level Master's degree
author Amin, Mehedi
author_facet Amin, Mehedi
author_sort Amin, Mehedi
title Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer
title_short Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer
title_full Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer
title_fullStr Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer
title_full_unstemmed Effects of Malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer
title_sort effects of malaysian outdoor weather on physical and mechanical properties of pigmented maxillofacial prosthetic silicone elastomer
granting_institution Universiti Sains Malaysia
granting_department Pusat Pengajian Sains Pergigian
publishDate 2021
url http://eprints.usm.my/54517/1/MEHEDI%20AMIN%20-FINAL%20THESIS%20P-SGM002217%28R%29%20PWD_-24%20pages.pdf
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