Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro Study
Statement of the Problem: Different materials can be used to reconstruct the core foundation in all-ceramic restorations. Bond strength of the core material to zirconia is an important factor in long-term restoration success. Purpose: The aim of this study was to assess shear bond strength (SBS) o...
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| Format: | Article |
| Language: | English |
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Shiraz University of Medical Sciences
2021-07-01
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| Series: | Journal of Dentistry |
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| Online Access: | https://dentjods.sums.ac.ir/article_46878_007a8a14d54292be9a9e785cdfbe2549.pdf |
| _version_ | 1798022825170173952 |
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| author | Sara Tavakolizadeh Mohamad Dehghan Rahab Ghoveizi Anahita Fayyazi |
| author_facet | Sara Tavakolizadeh Mohamad Dehghan Rahab Ghoveizi Anahita Fayyazi |
| author_sort | Sara Tavakolizadeh |
| collection | DOAJ |
| description | Statement of the Problem: Different materials can be used to reconstruct the core foundation in all-ceramic restorations. Bond strength of the core material to zirconia is an important factor in long-term restoration success.
Purpose: The aim of this study was to assess shear bond strength (SBS) of zirconia to four different core materials.
Materials and Method: In this experimental in vitro study, 40 zirconia ceramic disks (10×3 mm) were prepared and divided to four groups based on core material. Cylinder shaped core specimens (3×4 mm) of non-precious gold alloy (NPG), zirconia ceramic, natural dentin, and composite resin were prepared and bonded perpendicularly to the zirconia disks using Gillmore Needle Apparatus and dual cure resin cement. All samples were thermocycled for 2000 cycles. To evaluate SBS, the specimens were tested by universal testing machine. Data were analyzed using Kruskal-Wallis test followed by Dunn's test with Bonferroni correction. Statistical significance was set at p< 0.05.
Results: The highest values for SBS were achieved in composite resin group (11.58±1.74 MPa) followed by NPG (10.32±0.94 MPa), zirconia (7.3±1.11 MPa) and dentin group (6.53±0.56 MPa). SBS in composite resin and NPG core materials were significantly higher than other core materials (p< 0.05).
Conclusion: Composite resin and NPG cores showed significant higher bond strength to zirconia in comparison to dentine and zirconia core materials. |
| first_indexed | 2024-04-11T17:37:28Z |
| format | Article |
| id | doaj.art-1dab86a36eae405fa15eb1b5a689d3f9 |
| institution | Directory Open Access Journal |
| issn | 2345-6485 2345-6418 |
| language | English |
| last_indexed | 2024-04-11T17:37:28Z |
| publishDate | 2021-07-01 |
| publisher | Shiraz University of Medical Sciences |
| record_format | Article |
| series | Journal of Dentistry |
| spelling | doaj.art-1dab86a36eae405fa15eb1b5a689d3f92022-12-22T04:11:35ZengShiraz University of Medical SciencesJournal of Dentistry2345-64852345-64182021-07-0122213814310.30476/DENTJODS.2020.86215.1176Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro StudySara Tavakolizadeh 0Mohamad Dehghan 1Rahab Ghoveizi 2Anahita Fayyazi3Dept. of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.Dept. of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.Dept. of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.Post Graduate Student of Prosthodontics, Dept. of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.Statement of the Problem: Different materials can be used to reconstruct the core foundation in all-ceramic restorations. Bond strength of the core material to zirconia is an important factor in long-term restoration success. Purpose: The aim of this study was to assess shear bond strength (SBS) of zirconia to four different core materials. Materials and Method: In this experimental in vitro study, 40 zirconia ceramic disks (10×3 mm) were prepared and divided to four groups based on core material. Cylinder shaped core specimens (3×4 mm) of non-precious gold alloy (NPG), zirconia ceramic, natural dentin, and composite resin were prepared and bonded perpendicularly to the zirconia disks using Gillmore Needle Apparatus and dual cure resin cement. All samples were thermocycled for 2000 cycles. To evaluate SBS, the specimens were tested by universal testing machine. Data were analyzed using Kruskal-Wallis test followed by Dunn's test with Bonferroni correction. Statistical significance was set at p< 0.05. Results: The highest values for SBS were achieved in composite resin group (11.58±1.74 MPa) followed by NPG (10.32±0.94 MPa), zirconia (7.3±1.11 MPa) and dentin group (6.53±0.56 MPa). SBS in composite resin and NPG core materials were significantly higher than other core materials (p< 0.05). Conclusion: Composite resin and NPG cores showed significant higher bond strength to zirconia in comparison to dentine and zirconia core materials.https://dentjods.sums.ac.ir/article_46878_007a8a14d54292be9a9e785cdfbe2549.pdfcomposite resins; corerestore; shear strength; yttria stabilized tetragonal zirconia |
| spellingShingle | Sara Tavakolizadeh Mohamad Dehghan Rahab Ghoveizi Anahita Fayyazi Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro Study Journal of Dentistry composite resins; corerestore; shear strength; yttria stabilized tetragonal zirconia |
| title | Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro Study |
| title_full | Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro Study |
| title_fullStr | Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro Study |
| title_full_unstemmed | Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro Study |
| title_short | Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An in vitro Study |
| title_sort | shear bond strength of zirconia ceramic to four different core materials an in vitro study |
| topic | composite resins; corerestore; shear strength; yttria stabilized tetragonal zirconia |
| url | https://dentjods.sums.ac.ir/article_46878_007a8a14d54292be9a9e785cdfbe2549.pdf |
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