The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh
Purpose: This in-vitro study was carried out to evaluate the effect of a denture cleanser on the color stability, surface roughness, and the flexural modulus of a flexible polyamide thermoplastic denture base material, following immersion in a commercially available neutral peroxide enzymatic den...
| Main Author: | |
|---|---|
| Format: | Thesis |
| Published: |
2019
|
| Subjects: | |
| Online Access: | http://studentsrepo.um.edu.my/11536/ http://studentsrepo.um.edu.my/11536/4/hazem.pdf |
| _version_ | 1848774410864951296 |
|---|---|
| author | Hazem Mofreh, Altarawneh |
| author_facet | Hazem Mofreh, Altarawneh |
| author_sort | Hazem Mofreh, Altarawneh |
| building | UM Research Repository |
| collection | Online Access |
| description | Purpose: This in-vitro study was carried out to evaluate the effect of a denture cleanser
on the color stability, surface roughness, and the flexural modulus of a flexible polyamide
thermoplastic denture base material, following immersion in a commercially available
neutral peroxide enzymatic denture cleanser. Materials and methods: Sixty (60)
rectangular specimens (64mm x 10mm x 3.3mm) of polyamide thermoplastic denture
base material (Vertex™ ThermoSens) were prepared and immersed in distilled water
(n=25) as control, and a denture cleanser (Polident 3 min™), simulating 180 days of usage
(n=25), 10 specimens were not immersed in any solution for baseline measurements.
Color measurements (∆E) were obtained using Spectrophotometer. The surface
roughness (Ra) was determined using an optical 3-dimensional (3D) surface analyzer.
Three-point bending test executed using a universal testing machine to measure the
flexural modulus∆E values were submitted to statistical analysis by means of One-sample
test, then the Paired sample test was used to compare the color parameters (L*, a*, b*).
The Ra values were analyzed using the Paired sample test. The flexural modulus values
were submitted to One-way ANOVA test. All the statistics were done at a significant
level of P=0.05 with the aid of the statistical program SPSS 20.0 (SPSS Inc., Chicago,
IL,USA). Results: Following the immersion in the denture cleanser, the mean of the color
changes (∆E) (0.75±0.47) showed statistically significant difference (p<0.05) compared
to the control group (0.27±0.21), however, it was classified as slight (0.5-1.5) when
quantified by the National Bureau of Standards (NBS). There was a significant increase
(p<0.05) in the surface roughness (Ra) was detected after the immersion. However, there
was no significant difference in the flexural modulus (p<0.05) between the control, the
test and non-immersed groups. Conclusion: The use of the neutral peroxide enzymatic
vi
denture cleanser Polident 3 min™ significantly increases the surface roughness of the
polyamide thermoplastic denture base material (Vertex™ ThermoSens), however, the
color changes were within the clinically accepted range, and the changes in the flexural
modulus of the material were not significant. |
| first_indexed | 2025-11-14T13:57:52Z |
| format | Thesis |
| id | um-11536 |
| institution | University Malaya |
| institution_category | Local University |
| last_indexed | 2025-11-14T13:57:52Z |
| publishDate | 2019 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | um-115362022-01-02T23:15:56Z The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh Hazem Mofreh, Altarawneh RK Dentistry Purpose: This in-vitro study was carried out to evaluate the effect of a denture cleanser on the color stability, surface roughness, and the flexural modulus of a flexible polyamide thermoplastic denture base material, following immersion in a commercially available neutral peroxide enzymatic denture cleanser. Materials and methods: Sixty (60) rectangular specimens (64mm x 10mm x 3.3mm) of polyamide thermoplastic denture base material (Vertex™ ThermoSens) were prepared and immersed in distilled water (n=25) as control, and a denture cleanser (Polident 3 min™), simulating 180 days of usage (n=25), 10 specimens were not immersed in any solution for baseline measurements. Color measurements (∆E) were obtained using Spectrophotometer. The surface roughness (Ra) was determined using an optical 3-dimensional (3D) surface analyzer. Three-point bending test executed using a universal testing machine to measure the flexural modulus∆E values were submitted to statistical analysis by means of One-sample test, then the Paired sample test was used to compare the color parameters (L*, a*, b*). The Ra values were analyzed using the Paired sample test. The flexural modulus values were submitted to One-way ANOVA test. All the statistics were done at a significant level of P=0.05 with the aid of the statistical program SPSS 20.0 (SPSS Inc., Chicago, IL,USA). Results: Following the immersion in the denture cleanser, the mean of the color changes (∆E) (0.75±0.47) showed statistically significant difference (p<0.05) compared to the control group (0.27±0.21), however, it was classified as slight (0.5-1.5) when quantified by the National Bureau of Standards (NBS). There was a significant increase (p<0.05) in the surface roughness (Ra) was detected after the immersion. However, there was no significant difference in the flexural modulus (p<0.05) between the control, the test and non-immersed groups. Conclusion: The use of the neutral peroxide enzymatic vi denture cleanser Polident 3 min™ significantly increases the surface roughness of the polyamide thermoplastic denture base material (Vertex™ ThermoSens), however, the color changes were within the clinically accepted range, and the changes in the flexural modulus of the material were not significant. 2019 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/11536/4/hazem.pdf Hazem Mofreh, Altarawneh (2019) The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh. Masters thesis, Universiti Malaya. http://studentsrepo.um.edu.my/11536/ |
| spellingShingle | RK Dentistry Hazem Mofreh, Altarawneh The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh |
| title | The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh |
| title_full | The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh |
| title_fullStr | The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh |
| title_full_unstemmed | The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh |
| title_short | The effect of a denture cleanser on the properties of a flexible thermoplastic resin / Hazem Mofreh Altarawneh |
| title_sort | effect of a denture cleanser on the properties of a flexible thermoplastic resin / hazem mofreh altarawneh |
| topic | RK Dentistry |
| url | http://studentsrepo.um.edu.my/11536/ http://studentsrepo.um.edu.my/11536/4/hazem.pdf |