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The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite
Dissertation (MSc)--University of Pretoria, 2015.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2016
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| _version_ | 1867613513840590848 |
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| access_status_str | Open Access |
| author2 | Brandt, Paul Dieter |
| author_browse | Brandt, Paul Dieter |
| author_facet | Brandt, Paul Dieter |
| collection | Thesis |
| dc_rights_str_mv | © 2016 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. |
| description | Dissertation (MSc)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/53057 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:20.986Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/53057 The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite Brandt, Paul Dieter dorette.kritzinger@up.ac.za Kritzinger, Dorette UCTD Health sciences theses SDG-03 Health sciences theses SDG-17 Dissertation (MSc)--University of Pretoria, 2015. Objectives: To evaluate the surface roughness of a nanocomposite and a microhybrid composite after polishing the composites with different polishing systems. Key words: Polishing, surface roughness, microhybrid composite, nanocomposite, Sof-Lex XT, Spiral Wheels, Enhance, Intensiv UniglossCellbrush, Zircon-Brite, Dura-White stones, Mylar strips Methods: The composites used in this study were Filtek Supreme XTE (3M ESPE, St Paul, USA) and Z100 (3M ESPE, St Paul, USA). Thirty-five composite samples were made from each of the two composites. Uncured composite was placed into an aluminium ring mould, 10mm X 2mm. Both the upper and lower surfaces of the composite were covered with Mylar strips and glass plates, before the specimens were cured for 40 seconds from both sides. Samples were randomly divided into seven groups. The groups were: 1. Mylar polyester strip (control) 2. Sof-Lex XT finishing and polishing discs (3M ESPE, St Paul, USA) 3. Sof-Lex Spiral Wheels (3M ESPE, St Paul, USA) 4. Dura-White stones (Shofu Inc, Kyoto, Japan) 5. Intensiv UniglossCellbrush (Intensiv SA, Montagnola, Switzerland) 6. Enhance finishing and polishing system (Dentsply, Milford, USA) 7. Sof-Lex Spiral Wheels combined with Zircon-Brite (Dental Ventures of America, Corona, USA) The polishing of the specimens was performed by a single operator according to manufacturer s instructions. The mean surface roughness of each specimen was determined using a profilometer (Surftest SJ 210, Mitutoyo, Tokyo, Japan). Three readings were collected from each specimen. Data was statistically analysed using ANOVA. Scanning Electron Microscope (JEOL JSM-5800 LV, Tokyo, Japan) photos were taken of the representative samples. Results: Statistically significant differences in surface roughness were observed between the following groups: Z100 and Filtek Supreme XTE with the polishing systems combined (p=0.005); Control group vs all the polishing systems; Sof-Lex XT finishing and polishing discs vs Dura-White stones, Intensiv UniglossCellbrush, Enhance finishing and polishing system (p < 0.0001); Sof-Lex Spiral Wheels vs Dura-White stones, Intensiv Unigloss Cellbrush, Enhance finishing and polishing system (p <0.0001); Dura-White stones vs Intensiv UniglossCellbrush, Enhance finishing and polishing system, Sof-Lex Spiral Wheels/Zircon-Brite (p <0.0001); Intensiv UniglossCellbrush vs. Spiral Wheels/Zircon-Brite (p<0.0001); Enhance finishing and polishing system vs. Spiral Wheels/Zircon-Brite (p <0.0001). Conclusion: Filtek Supreme XTE displayed significantly better polishability and lower surface roughness values after polishing than Z100. The composite samples cured against the Mylar polyester strip produced significantly smoother surface roughness values than all the polishing systems tested in this study. The following polishing systems led to the smoothest surfaces after polishing: Sof-lex Spiral Wheels in combination with Zircon-Brite, as well as the Sof-Lex Spiral Wheels and Sof-Lex finishing and polishing discs. These systems were significantly smoother than the Enhance system used in combination with Prisma Gloss polishing paste, and also the one-step polishing system Intensiv UniglossCellbrush. There was no statistically significant difference between Sof-Lex Spiral Wheels in combination with Zircon-Brite, the Sof-Lex Spiral Wheels and the Sof-Lex finishing and polishing discs. em2026 Odontology MSc Unrestricted SDG-03: Good health and well-being SDG-17: Partnerships for the goals 2016-06-10T07:22:50Z 2016-06-10T07:22:50Z 2016-04-08 2015 Dissertation Kritzinger, D 2015, The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/53057> A2016 http://hdl.handle.net/2263/53057 en © 2016 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Health sciences theses SDG-03 Health sciences theses SDG-17 The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite |
| title | The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite |
| title_full | The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite |
| title_fullStr | The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite |
| title_full_unstemmed | The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite |
| title_short | The effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite |
| title_sort | effect of different polishing systems on the surface roughness of a nanocomposite and a microhybrid composite |
| topic | UCTD Health sciences theses SDG-03 Health sciences theses SDG-17 |
| url | http://hdl.handle.net/2263/53057 |