Publicação
Biomechanical Performance of Polyethylene Fiber, Glass Fiber and Short Fiber-Reinforced Composite Resins in Dental Restorations: A Pilot Study
| Resumo: | Introduction: The decline in the biomechanical properties of teeth due to structural loss drives the development of advanced materials and techniques for dental restorations. This pilot study aims to evaluate the influence of polyethylene fiber, glass fiber, and conventional and short fiber-reinforced composite resins on fracture resistance and failure mode of restored structurally compromised teeth.Materials and methods: Twenty-seven (27) intact premolars were collected and randomly divided into nine groups according to their crown volume (n=3). Two groups served as controls: the negative (Intact) and the positive (Unrestored). Standardized mesio-occluso-distal (MOD) cavities were prepared, followed by restoration with different materials. After the adhesive procedure, resin coating, and rebuilding of the missing interproximal walls with a conventional composite resin (CCR), the samples were restored using different studied materials according to the following groups: GæP - CCR only; EvXP and UnP - packable short fiber-reinforced composites; EvXF and UnF - flowable short fiber-reinforced composites; EvSN (glass fiber net) and RIB (polyethylene fiber) positioned bucco-lingually at the cavity base followed by a CCR restoration. Restorations were completed with an occlusal matrix-guided 2mm CCR restoration. Fracture resistance was tested using a universal testing machine, and fracture thresholds and patterns were analyzed.Results: Statistically significant differences in fracture resistance values were observed among the groups (p=0.034), with only the comparison between the Intact and Unrestored groups presenting statistically significant differences (p=0.025). The statistical power achieved was 83%. There was no statistically significant association between the groups regarding failure mode (p=0.152).Conclusion: Within the limitations of this study, no statistically significant differences were identified in the biomechanical performance among the various restorative materials tested. Keywords: Flexural strength; Composite resins; Short fiber-reinforced composite; Polyethylene fiber; Glass Fiber |
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| Autores principais: | Fernandes, Beatriz Paredes |
| Assunto: | Flexural strength Composite resins Short fiber-reinforced composite Polyethylene fiber Glass Fiber Resistência à flexão Resinas compostas Compósito reforçado com fibras curtas Fibra de polietileno Fibra de vidro |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Coimbra |
| Idioma: | inglês |
| Origem: | Estudo Geral - Universidade de Coimbra |
| Resumo: | Introduction: The decline in the biomechanical properties of teeth due to structural loss drives the development of advanced materials and techniques for dental restorations. This pilot study aims to evaluate the influence of polyethylene fiber, glass fiber, and conventional and short fiber-reinforced composite resins on fracture resistance and failure mode of restored structurally compromised teeth.Materials and methods: Twenty-seven (27) intact premolars were collected and randomly divided into nine groups according to their crown volume (n=3). Two groups served as controls: the negative (Intact) and the positive (Unrestored). Standardized mesio-occluso-distal (MOD) cavities were prepared, followed by restoration with different materials. After the adhesive procedure, resin coating, and rebuilding of the missing interproximal walls with a conventional composite resin (CCR), the samples were restored using different studied materials according to the following groups: GæP - CCR only; EvXP and UnP - packable short fiber-reinforced composites; EvXF and UnF - flowable short fiber-reinforced composites; EvSN (glass fiber net) and RIB (polyethylene fiber) positioned bucco-lingually at the cavity base followed by a CCR restoration. Restorations were completed with an occlusal matrix-guided 2mm CCR restoration. Fracture resistance was tested using a universal testing machine, and fracture thresholds and patterns were analyzed.Results: Statistically significant differences in fracture resistance values were observed among the groups (p=0.034), with only the comparison between the Intact and Unrestored groups presenting statistically significant differences (p=0.025). The statistical power achieved was 83%. There was no statistically significant association between the groups regarding failure mode (p=0.152).Conclusion: Within the limitations of this study, no statistically significant differences were identified in the biomechanical performance among the various restorative materials tested. Keywords: Flexural strength; Composite resins; Short fiber-reinforced composite; Polyethylene fiber; Glass Fiber |
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