Effect of denture cleanser containing longan-extract granules on color stability, surface roughness and hardness of a polymeric denture base material.
Objective: To investigate the change of color, surface roughness and surface hardness of a PMMA denture base material after immersion in solution prepared from longan-extract granules compared with denture cleanser without longan-extract granules and distilled water. Materials and methods: Circu...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://repository.li.mahidol.ac.th/handle/123456789/1093 |
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| Institution: | Mahidol University |
| Language: | English |
| Summary: | Objective: To investigate the change of color, surface roughness and surface
hardness of a PMMA denture base material after immersion in solution
prepared from longan-extract granules compared with denture cleanser
without longan-extract granules and distilled water.
Materials and methods: Circular discs of SR Triplex Hot with 30 mm. in
diameter and 3 mm. in thickness (n=10) were immersed in denture
cleanser containing longan-extract granules, denture cleanser without
longan-extract granules or distilled water for 10 cycles of 30 minutes.
Color stability, surface roughness and hardness were measured before and
after immersion in those solutions for 5th and 10th cycles by using colorimeter,
profilometer and Knoop hardness tester, respectively. Split-Plot
ANOVA was used for analyzing the influence of denture cleanser solutions
and storage times on the surface color stability, surface roughness and
hardness of PMMA denture base material at a 0.05 significant level.
Results and conclusions: The type of denture cleansers and immersion
cycle had no influence on the color change and surface roughness. Also
the result of surface hardness test of between-subjects effects (solution)
and the interaction of both effects were not significant different (p>0.05),
but the tests of within-subjects effects (immersion cycle) was significant
different (p<0.05). So, Knoop hardness test was not modified by any
solutions but decreased over time. The values of NBS ratings which is
the way color changes evaluated by the human eye showed that the color
change of all specimens after immersion in all solutions at 5th and 10th
cycles were çtrace to slighté. |
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