Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models
OBJECTIVE: The aim of this in vitro study was to evaluate the microtensile bond strength (µTBS) to dentin of two different restorative systems: silorane-based (P90), and methacrylate-based (P60), using two cavity models. MATERIAL AND METHODS: Occlusal enamel of 40 human third molars was removed to...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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University of São Paulo
2013-09-01
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| Series: | Journal of Applied Oral Science |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000500452&lng=en&tlng=en |
| _version_ | 1811273015635214336 |
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| author | Stephano Zerlottini Isaac Ana Claudia Pietrobom Bergamin Cecilia Pedroso Turssi Flavia Lucisano Botelho do Amaral Roberta Tarkany Basting Fabiana Mantovani Gomes Franca |
| author_facet | Stephano Zerlottini Isaac Ana Claudia Pietrobom Bergamin Cecilia Pedroso Turssi Flavia Lucisano Botelho do Amaral Roberta Tarkany Basting Fabiana Mantovani Gomes Franca |
| author_sort | Stephano Zerlottini Isaac |
| collection | DOAJ |
| description | OBJECTIVE: The aim of this in vitro study was to evaluate the microtensile bond strength (µTBS) to dentin of two different restorative systems: silorane-based (P90), and methacrylate-based (P60), using two cavity models. MATERIAL AND METHODS: Occlusal enamel of 40 human third molars was removed to expose flat dentin surface. Class I cavities with 4 mm mesial-distal width, 3 mm buccal-lingual width and 3 mm depth (C-factor=4.5) were prepared in 20 teeth, which were divided into two groups (n=10) restored with P60 and P90, bulk-filled after dentin treatment according to manufacturer's instructions. Flat buccal dentin surfaces were prepared in the 20 remaining teeth (C-factor=0.2) and restored with resin blocks measuring 4x3x3 mm using the two restorative systems (n=10). The teeth were sectioned into samples with area between 0.85 and 1.25 mm2 that were submitted to µTBS testing, using a universal testing machine (EMIC) at speed of 0.5 mm/min. Fractured specimens were analyzed under stereomicroscope and categorized according to fracture pattern. Data were analyzed using ANOVA and Tukey Kramer tests. RESULTS: For flat surfaces, P60 obtained higher bond strength values compared with P90. However, for Class I cavities, P60 showed significant reduction in bond strength (p<0.05). No statistical difference between restorative systems was shown for Class I cavity model (p>0.05), or between Class I Cavity and Flat Surface group, considering P90 restorative system (p>0.05). Regarding fracture pattern, there was no statistical difference among groups (p=0.0713) and 56.3% of the fractures were adhesive. CONCLUSION: It was concluded that methacrylate-based composite µTBS was influenced by cavity models, and the use of silorane-based composite led to similar bond strength values compared to the methacrylate-based composite in cavities with high C-factor. |
| first_indexed | 2024-04-12T22:51:36Z |
| format | Article |
| id | doaj.art-c0550432c17a4bf596cb30c9c6c74df8 |
| institution | Directory Open Access Journal |
| issn | 1678-7765 |
| language | English |
| last_indexed | 2024-04-12T22:51:36Z |
| publishDate | 2013-09-01 |
| publisher | University of São Paulo |
| record_format | Article |
| series | Journal of Applied Oral Science |
| spelling | doaj.art-c0550432c17a4bf596cb30c9c6c74df82022-12-22T03:13:20ZengUniversity of São PauloJournal of Applied Oral Science1678-77652013-09-0121545245910.1590/1679-775720130120S1678-77572013000500452Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity modelsStephano Zerlottini IsaacAna Claudia Pietrobom BergaminCecilia Pedroso TurssiFlavia Lucisano Botelho do AmaralRoberta Tarkany BastingFabiana Mantovani Gomes FrancaOBJECTIVE: The aim of this in vitro study was to evaluate the microtensile bond strength (µTBS) to dentin of two different restorative systems: silorane-based (P90), and methacrylate-based (P60), using two cavity models. MATERIAL AND METHODS: Occlusal enamel of 40 human third molars was removed to expose flat dentin surface. Class I cavities with 4 mm mesial-distal width, 3 mm buccal-lingual width and 3 mm depth (C-factor=4.5) were prepared in 20 teeth, which were divided into two groups (n=10) restored with P60 and P90, bulk-filled after dentin treatment according to manufacturer's instructions. Flat buccal dentin surfaces were prepared in the 20 remaining teeth (C-factor=0.2) and restored with resin blocks measuring 4x3x3 mm using the two restorative systems (n=10). The teeth were sectioned into samples with area between 0.85 and 1.25 mm2 that were submitted to µTBS testing, using a universal testing machine (EMIC) at speed of 0.5 mm/min. Fractured specimens were analyzed under stereomicroscope and categorized according to fracture pattern. Data were analyzed using ANOVA and Tukey Kramer tests. RESULTS: For flat surfaces, P60 obtained higher bond strength values compared with P90. However, for Class I cavities, P60 showed significant reduction in bond strength (p<0.05). No statistical difference between restorative systems was shown for Class I cavity model (p>0.05), or between Class I Cavity and Flat Surface group, considering P90 restorative system (p>0.05). Regarding fracture pattern, there was no statistical difference among groups (p=0.0713) and 56.3% of the fractures were adhesive. CONCLUSION: It was concluded that methacrylate-based composite µTBS was influenced by cavity models, and the use of silorane-based composite led to similar bond strength values compared to the methacrylate-based composite in cavities with high C-factor.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000500452&lng=en&tlng=enComposite resinsDental cavity preparationTensile strength |
| spellingShingle | Stephano Zerlottini Isaac Ana Claudia Pietrobom Bergamin Cecilia Pedroso Turssi Flavia Lucisano Botelho do Amaral Roberta Tarkany Basting Fabiana Mantovani Gomes Franca Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models Journal of Applied Oral Science Composite resins Dental cavity preparation Tensile strength |
| title | Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models |
| title_full | Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models |
| title_fullStr | Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models |
| title_full_unstemmed | Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models |
| title_short | Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models |
| title_sort | evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models |
| topic | Composite resins Dental cavity preparation Tensile strength |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000500452&lng=en&tlng=en |
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