Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different Materials
Objectives: Heat-polymerized acrylic resin has been the most commonly used denture base material for over 60 years. However, the mechanical strength of acrylic resin is not adequate for long-term clinical performance of dentures. Consequently, fracture is a com- mon clinical occurrence, which often...
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
2016-02-01
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| Series: | Frontiers in Dentistry |
| Subjects: | |
| Online Access: | https://jdt.tums.ac.ir/index.php/jdt/article/view/304 |
| _version_ | 1819027768660197376 |
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| author | Bijan Heidari Farnaz Firouz Alireza Izadi Shahbaz Ahmadvand Pegah Radan |
| author_facet | Bijan Heidari Farnaz Firouz Alireza Izadi Shahbaz Ahmadvand Pegah Radan |
| author_sort | Bijan Heidari |
| collection | DOAJ |
| description | Objectives: Heat-polymerized acrylic resin has been the most commonly used denture base material for over 60 years. However, the mechanical strength of acrylic resin is not adequate for long-term clinical performance of dentures. Consequently, fracture is a com- mon clinical occurrence, which often occurs in the midline of denture base.This study aimed to evaluate the efficacy of cold cure and heat cure acrylic resins, rein- forced with glass fibers, polyethylene fibers, and metal wire for denture base repair.
Materials and Methods: Ninety specimens were prepared and allocated to nine groups. Ten specimens were included in the control group, and 80 were allocated to 8 experi- mental groups. In the experimental groups, the specimens were sectioned into two halves from the middle, and were then divided into two main groups: one group was repaired with heat cure acrylic resin, and the other with cold cure acrylic resin. Each group was di- vided into 4 subgroups: unreinforced, reinforced with glass fibers, polyethylene fibers, and metal wire. All specimens were then subjected to a 3-point bending test, and the flexural strength was calculated.
Results: The group repaired with heat cure acrylic resin and reinforced with glass fiber showed the highest flexural strength; however, the group repaired with cold cure acrylic resin and reinforced with polyethylene fibers had the lowest flexural strength. There was no significant difference between the groups repaired with heat cure and cold cure acrylic resins without reinforcement.
Conclusion: Repairing denture base with heat cure acrylic resin, reinforced with glass fi- bers increases the flexural strength of denture base. |
| first_indexed | 2024-12-21T05:47:43Z |
| format | Article |
| id | doaj.art-6ff7e366ef614016bf42b6cca3b10e84 |
| institution | Directory Open Access Journal |
| issn | 2676-296X |
| language | English |
| last_indexed | 2024-12-21T05:47:43Z |
| publishDate | 2016-02-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Frontiers in Dentistry |
| spelling | doaj.art-6ff7e366ef614016bf42b6cca3b10e842022-12-21T19:14:05ZengTehran University of Medical SciencesFrontiers in Dentistry2676-296X2016-02-01125286Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different MaterialsBijan Heidari0Farnaz Firouz1Alireza Izadi2Shahbaz Ahmadvand3Pegah Radan4Assistant Professor, Department of Prosthodontic Dentistry, Hamadan University of Medical Sciences, Hamadan, IranAssistant Professor, Department of Prosthodontic Dentistry, Hamadan University of Medical Sciences, Hamadan, IranAssistant Professor, Department of Prosthodontic Dentistry, Hamadan University of Medical Sciences, Hamadan, IranPrivate Practice, Hamadan, IranPostgraduate Student, Department of Prosthodontic Dentistry, Hamadan University of Medical Sciences, Hamadan, IranObjectives: Heat-polymerized acrylic resin has been the most commonly used denture base material for over 60 years. However, the mechanical strength of acrylic resin is not adequate for long-term clinical performance of dentures. Consequently, fracture is a com- mon clinical occurrence, which often occurs in the midline of denture base.This study aimed to evaluate the efficacy of cold cure and heat cure acrylic resins, rein- forced with glass fibers, polyethylene fibers, and metal wire for denture base repair. Materials and Methods: Ninety specimens were prepared and allocated to nine groups. Ten specimens were included in the control group, and 80 were allocated to 8 experi- mental groups. In the experimental groups, the specimens were sectioned into two halves from the middle, and were then divided into two main groups: one group was repaired with heat cure acrylic resin, and the other with cold cure acrylic resin. Each group was di- vided into 4 subgroups: unreinforced, reinforced with glass fibers, polyethylene fibers, and metal wire. All specimens were then subjected to a 3-point bending test, and the flexural strength was calculated. Results: The group repaired with heat cure acrylic resin and reinforced with glass fiber showed the highest flexural strength; however, the group repaired with cold cure acrylic resin and reinforced with polyethylene fibers had the lowest flexural strength. There was no significant difference between the groups repaired with heat cure and cold cure acrylic resins without reinforcement. Conclusion: Repairing denture base with heat cure acrylic resin, reinforced with glass fi- bers increases the flexural strength of denture base.https://jdt.tums.ac.ir/index.php/jdt/article/view/304StrengthDenture repairAcrylic resinsReinforcement |
| spellingShingle | Bijan Heidari Farnaz Firouz Alireza Izadi Shahbaz Ahmadvand Pegah Radan Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different Materials Frontiers in Dentistry Strength Denture repair Acrylic resins Reinforcement |
| title | Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different Materials |
| title_full | Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different Materials |
| title_fullStr | Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different Materials |
| title_full_unstemmed | Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different Materials |
| title_short | Flexural Strength of Cold and Heat Cure Acrylic Resins Reinforced with Different Materials |
| title_sort | flexural strength of cold and heat cure acrylic resins reinforced with different materials |
| topic | Strength Denture repair Acrylic resins Reinforcement |
| url | https://jdt.tums.ac.ir/index.php/jdt/article/view/304 |
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