Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations.
Dissertation (MSc)--University of Pretoria, 2015.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2016
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613628707897345 |
|---|---|
| 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:2263/53053 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:10.429Z |
| 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:2263/53053 Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations. Brandt, Paul Dieter landas@lando.co.za De Wet, Francois A. Visser, Jacobus UCTD Health sciences theses SDG-03 Dissertation (MSc)--University of Pretoria, 2015. Objectives: This in vitro study investigated and compared the fracture strength and behaviour patterns of a conventional posterior composite resin, a composite resin reinforced with nano-scale electrospun glass-fibres and a conventional composite resin placed on a fibre substructure, all used in cusp-replacing posterior composite resin restorations. Methods: Seventy-five extracted, lower, left, first and second molars were prepared to accept standardized restorations replacing the mesio-lingual cusp. The specimens were randomly divided into 3 groups of 25 each: Group A (control) was restored with a conventional posterior composite resin, Group B was restored with the composite resin reinforced with nano-scale electrospun glass fibres and Group C was restored with a conventional posterior composite resin reinforced with a fibre substructure. All restored specimens were thermocycled for 500 cycles between 5° C and 55° C with a dwell time of 30 seconds, then imbedded in plastic cylinders in acrylic resin. The specimens were loaded at a 30° angle to the long axis of the tooth, using a jig mounted in a universal testing machine until fracture occurred. Fracture strength was recorded and specimens were then stained to highlight fracture patterns and subsequently studied under a microscope. Fractures were classified as restorable/non-restorable. Sub-classification included adhesive and cohesive failures. Results: Compared to Group A both techniques of fibre inclusion significantly strengthened the cusp-replacing composite restoration (ANOVA p = 0.05) Compared to Groups A and B the group of restorations placed on a fibre sub-structure (Group C) exhibited significantly more fractures that were classed as restorable. Compared to Group A and C the group restored with the composite resin reinforced with nano scale electrospun glass fibres (Group B) displayed significantly more fractures that were classed as non-restorable (Fisher s Exact Test p = 0.05). Conclusion: Both fibre inclusion techniques significantly strengthened cuspreplacing posterior composite restorations. Fracture behaviour patterns differed significantly between the two fibre-strengthening techniques. em2026 Odontology MSc Unrestricted SDG-03: Good health and well-being 2016-06-10T07:20:11Z 2016-06-10T07:20:11Z 2016-04-08 2015 Dissertation Visser, J 2015, Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations., MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/53053> A2016 http://hdl.handle.net/2263/53053 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 Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations. |
| title | Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations. |
| title_full | Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations. |
| title_fullStr | Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations. |
| title_full_unstemmed | Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations. |
| title_short | Fracture strength and fracture behaviour patterns of cusp-replacing fibre reinforced composite restorations. |
| title_sort | fracture strength and fracture behaviour patterns of cusp replacing fibre reinforced composite restorations |
| topic | UCTD Health sciences theses SDG-03 |
| url | http://hdl.handle.net/2263/53053 |