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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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 |
| _version_ |
1747822286537228288 |