Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating Sensors
Polymerization shrinkage is a major concern to the clinical success of direct composite resin restorations. The aim of this study was to compare the effect of polymerization shrinkage strain of two resin composites on cuspal movement based on the use of fiber Bragg grating (FBG) sensors. Twenty stan...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | International Journal of Biomaterials |
| Online Access: | http://dx.doi.org/10.1155/2016/7134283 |
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| author | Alexandra Vinagre João Ramos Sofia Alves Ana Messias Nélia Alberto Rogério Nogueira |
| author_facet | Alexandra Vinagre João Ramos Sofia Alves Ana Messias Nélia Alberto Rogério Nogueira |
| author_sort | Alexandra Vinagre |
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| description | Polymerization shrinkage is a major concern to the clinical success of direct composite resin restorations. The aim of this study was to compare the effect of polymerization shrinkage strain of two resin composites on cuspal movement based on the use of fiber Bragg grating (FBG) sensors. Twenty standardized Class II cavities prepared in upper third molars were allocated into two groups (n=10). Restorations involved the bulk fill placement of conventional microhybrid resin composite (Esthet•X® HD, Dentsply DeTrey) (Group 1) or flowable “low-shrinkage” resin composite (SDR™, Dentsply DeTrey) (Group 2). Two FBG sensors were used per restoration for real-time measurement of cuspal linear deformation and temperature variation. Group comparisons were determined using ANCOVA (α=0.05) considering temperature as the covariate. A statistically significant correlation between cuspal deflection, time, and material was observed (p<0.01). Cuspal deflection reached 8.8 μm (0.23%) and 7.8 μm (0.20%) in Groups 1 and 2, respectively. When used with bulk fill technique, flowable resin composite SDR™ induced significantly less cuspal deflection than the conventional resin composite Esthet•X® HD (p=0.015) and presented a smoother curve slope during the polymerization. FBG sensors appear to be a valid tool for accurate real-time monitoring of cuspal deformation. |
| format | Article |
| id | doaj-art-d6480ff6501d4651b6c85face15c035e |
| institution | Kabale University |
| issn | 1687-8787 1687-8795 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Biomaterials |
| spelling | doaj-art-d6480ff6501d4651b6c85face15c035e2025-02-03T06:12:55ZengWileyInternational Journal of Biomaterials1687-87871687-87952016-01-01201610.1155/2016/71342837134283Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating SensorsAlexandra Vinagre0João Ramos1Sofia Alves2Ana Messias3Nélia Alberto4Rogério Nogueira5Faculty of Medicine, University of Coimbra, Avenida Bissaya Barreto, Blocos de Celas, 3000-075 Coimbra, PortugalFaculty of Medicine, University of Coimbra, Avenida Bissaya Barreto, Blocos de Celas, 3000-075 Coimbra, PortugalFaculty of Medicine, University of Coimbra, Avenida Bissaya Barreto, Blocos de Celas, 3000-075 Coimbra, PortugalFaculty of Medicine, University of Coimbra, Avenida Bissaya Barreto, Blocos de Celas, 3000-075 Coimbra, PortugalInstituto de Telecomunicações (IT), Campus Universitário de Santiago, 3810-193 Aveiro, PortugalInstituto de Telecomunicações (IT), Campus Universitário de Santiago, 3810-193 Aveiro, PortugalPolymerization shrinkage is a major concern to the clinical success of direct composite resin restorations. The aim of this study was to compare the effect of polymerization shrinkage strain of two resin composites on cuspal movement based on the use of fiber Bragg grating (FBG) sensors. Twenty standardized Class II cavities prepared in upper third molars were allocated into two groups (n=10). Restorations involved the bulk fill placement of conventional microhybrid resin composite (Esthet•X® HD, Dentsply DeTrey) (Group 1) or flowable “low-shrinkage” resin composite (SDR™, Dentsply DeTrey) (Group 2). Two FBG sensors were used per restoration for real-time measurement of cuspal linear deformation and temperature variation. Group comparisons were determined using ANCOVA (α=0.05) considering temperature as the covariate. A statistically significant correlation between cuspal deflection, time, and material was observed (p<0.01). Cuspal deflection reached 8.8 μm (0.23%) and 7.8 μm (0.20%) in Groups 1 and 2, respectively. When used with bulk fill technique, flowable resin composite SDR™ induced significantly less cuspal deflection than the conventional resin composite Esthet•X® HD (p=0.015) and presented a smoother curve slope during the polymerization. FBG sensors appear to be a valid tool for accurate real-time monitoring of cuspal deformation.http://dx.doi.org/10.1155/2016/7134283 |
| spellingShingle | Alexandra Vinagre João Ramos Sofia Alves Ana Messias Nélia Alberto Rogério Nogueira Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating Sensors International Journal of Biomaterials |
| title | Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating Sensors |
| title_full | Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating Sensors |
| title_fullStr | Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating Sensors |
| title_full_unstemmed | Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating Sensors |
| title_short | Cuspal Displacement Induced by Bulk Fill Resin Composite Polymerization: Biomechanical Evaluation Using Fiber Bragg Grating Sensors |
| title_sort | cuspal displacement induced by bulk fill resin composite polymerization biomechanical evaluation using fiber bragg grating sensors |
| url | http://dx.doi.org/10.1155/2016/7134283 |
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