Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite
The aim of this study was to evaluate the effect of different photoactivation methods and base materials on the stress generated by the polymerization shrinkage of composites. The evaluated groups for the base material were: (G1) 1 coat of adhesive; (G2) 3 coats of adhesive, and (G3) flowable compos...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidade Estadual de Campinas
2015-11-01
|
| Series: | Brazilian Journal of Oral Sciences |
| Subjects: | |
| Online Access: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641776 |
| _version_ | 1818619450694303744 |
|---|---|
| author | Leonardo Gonçalves Cunha Roberta Caroline Bruschi Alonso Mario Alexandre Coelho Sinhoreti Mario Fernando Goes Lourenço Correr Sobrinho |
| author_facet | Leonardo Gonçalves Cunha Roberta Caroline Bruschi Alonso Mario Alexandre Coelho Sinhoreti Mario Fernando Goes Lourenço Correr Sobrinho |
| author_sort | Leonardo Gonçalves Cunha |
| collection | DOAJ |
| description | The aim of this study was to evaluate the effect of different photoactivation methods and base materials on the stress generated by the polymerization shrinkage of composites. The evaluated groups for the base material were: (G1) 1 coat of adhesive; (G2) 3 coats of adhesive, and (G3) flowable composite as a liner. The groups were divided in agreement with the photoactivation method: Continuous light (CL); Stepped Light (SL); Intermittent Light (IL); LED and Xenon Plasma Arc (XP). The generated stress was measured in a universal testing machine 5 minutes after the end of the photoactivation. The results were submitted to ANOVA and the averages values compared by Tukey test (5%). Inside of G1 group the mean values varied between 1.62 MPa (XP) to 2.22 MPa (CL), in which the XP method presented statistically inferior values to the other appraised methods. The values inside of G2 and G3 varied from 1.64 MPa (LED) to 2.15 MPa (CL) and 1.24 MPa (IL) to 1.92 MPa (SL), respectively, and the methods LED and IL presented statistically inferior values comparatively to the method CL inside of G2 and CL and SL inside of G3. The use of base materials was shown efficient in the reduction of the stress level generated by the polymerization shrinkage of restorative composites when LED or Intermittent light photoactivation methods are used. |
| first_indexed | 2024-12-16T17:37:41Z |
| format | Article |
| id | doaj.art-010afaa533714690ae58517d04e0bd96 |
| institution | Directory Open Access Journal |
| issn | 1677-3225 |
| language | English |
| last_indexed | 2024-12-16T17:37:41Z |
| publishDate | 2015-11-01 |
| publisher | Universidade Estadual de Campinas |
| record_format | Article |
| series | Brazilian Journal of Oral Sciences |
| spelling | doaj.art-010afaa533714690ae58517d04e0bd962022-12-21T22:22:41ZengUniversidade Estadual de CampinasBrazilian Journal of Oral Sciences1677-32252015-11-0131110.20396/bjos.v3i11.8641776Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin compositeLeonardo Gonçalves Cunha0Roberta Caroline Bruschi Alonso1Mario Alexandre Coelho Sinhoreti2Mario Fernando Goes3Lourenço Correr Sobrinho4Department of Restorative Dentistry – Piracicaba Dental SchoolDepartment of Restorative Dentistry – Piracicaba Dental SchoolDepartment of Restorative Dentistry – Piracicaba Dental SchoolDepartment of Restorative Dentistry – Piracicaba Dental SchoolDepartment of Restorative Dentistry – Piracicaba Dental SchoolThe aim of this study was to evaluate the effect of different photoactivation methods and base materials on the stress generated by the polymerization shrinkage of composites. The evaluated groups for the base material were: (G1) 1 coat of adhesive; (G2) 3 coats of adhesive, and (G3) flowable composite as a liner. The groups were divided in agreement with the photoactivation method: Continuous light (CL); Stepped Light (SL); Intermittent Light (IL); LED and Xenon Plasma Arc (XP). The generated stress was measured in a universal testing machine 5 minutes after the end of the photoactivation. The results were submitted to ANOVA and the averages values compared by Tukey test (5%). Inside of G1 group the mean values varied between 1.62 MPa (XP) to 2.22 MPa (CL), in which the XP method presented statistically inferior values to the other appraised methods. The values inside of G2 and G3 varied from 1.64 MPa (LED) to 2.15 MPa (CL) and 1.24 MPa (IL) to 1.92 MPa (SL), respectively, and the methods LED and IL presented statistically inferior values comparatively to the method CL inside of G2 and CL and SL inside of G3. The use of base materials was shown efficient in the reduction of the stress level generated by the polymerization shrinkage of restorative composites when LED or Intermittent light photoactivation methods are used.https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641776Base materials. Photoactivation methods. Resin composite. Shrinkage stress |
| spellingShingle | Leonardo Gonçalves Cunha Roberta Caroline Bruschi Alonso Mario Alexandre Coelho Sinhoreti Mario Fernando Goes Lourenço Correr Sobrinho Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite Brazilian Journal of Oral Sciences Base materials. Photoactivation methods. Resin composite. Shrinkage stress |
| title | Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite |
| title_full | Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite |
| title_fullStr | Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite |
| title_full_unstemmed | Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite |
| title_short | Effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite |
| title_sort | effect of photoactivation methods and base materials on the stress generated by the polymerization shrinkage of a resin composite |
| topic | Base materials. Photoactivation methods. Resin composite. Shrinkage stress |
| url | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641776 |
| work_keys_str_mv | AT leonardogoncalvescunha effectofphotoactivationmethodsandbasematerialsonthestressgeneratedbythepolymerizationshrinkageofaresincomposite AT robertacarolinebruschialonso effectofphotoactivationmethodsandbasematerialsonthestressgeneratedbythepolymerizationshrinkageofaresincomposite AT marioalexandrecoelhosinhoreti effectofphotoactivationmethodsandbasematerialsonthestressgeneratedbythepolymerizationshrinkageofaresincomposite AT mariofernandogoes effectofphotoactivationmethodsandbasematerialsonthestressgeneratedbythepolymerizationshrinkageofaresincomposite AT lourencocorrersobrinho effectofphotoactivationmethodsandbasematerialsonthestressgeneratedbythepolymerizationshrinkageofaresincomposite |