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The bulk compressive creep and recovery behavior of human dentine and resin-based dental materials
X. Wang, J. Zhou, D. Kang, MV. Swain, J. Menčík, Y. Jian, K. Zhao,
Language English Country Great Britain
Document type Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Dental Stress Analysis MeSH
- Dentin MeSH
- Humans MeSH
- Elasticity MeSH
- Composite Resins * MeSH
- Materials Testing MeSH
- Dental Materials * MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
OBJECTIVE: To evaluate and compare the viscoelastic properties of dentine and resin-based dental materials by bulk compressive test and the Burgers model. MATERIALS AND METHODS: Sound dentine, three resin composites as well as a resin-based cement were prepared into cylindrical specimens (n = 8). A bulk compressive creep test was applied with a constant load of 300 N (23.9 MPa) for 2 h, followed by another 2 h recovery. The maximum strain, creep stain, percentage of recovery and permanent set was measured using a linear variable displacement transducer. The viscoelastic properties were characterized via the Burgers model, and the instantaneous elastic, viscous as well as elastic delayed deformation were separated from the total strain. Data were analysed via ANOVA (or Welch's Test) and Tukey (or Games-Howell Test) with a significance level of 0.05. RESULTS: Sound dentine presented the lowest maximum strain, creep strain, permanent set and the highest percentage of recovery, followed by 3 resin composites with comparable parameters, while the cement showed a significantly higher maximum strain, permanent set and lower percentage of recovery (p < 0.001). The Burgers model presented acceptable fits for characterization viscoelastic processes of both dentine and resin-based dental materials. Viscous and elastic delayed strain of dentine was significantly lower than those for tested materials (p < 0.001) with the highest instantaneous elastic strain percentage. Similar viscous and delayed strain was found among the 4 resin-based materials (p > 0.05). SIGNIFICANCE: Sound dentine exhibited superior creep stability compared to resin-based dental materials. The viscous deformation in sound dentine could be ignored when loading parallel to dentine tubules.
References provided by Crossref.org
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- $a Wang, Xiaodong $u Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Engineering Research Center of Technology and Materials for Oral Reconstruction, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China. Electronic address: wangxd33@mail.sysu.edu.cn.
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- $a The bulk compressive creep and recovery behavior of human dentine and resin-based dental materials / $c X. Wang, J. Zhou, D. Kang, MV. Swain, J. Menčík, Y. Jian, K. Zhao,
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- $a OBJECTIVE: To evaluate and compare the viscoelastic properties of dentine and resin-based dental materials by bulk compressive test and the Burgers model. MATERIALS AND METHODS: Sound dentine, three resin composites as well as a resin-based cement were prepared into cylindrical specimens (n = 8). A bulk compressive creep test was applied with a constant load of 300 N (23.9 MPa) for 2 h, followed by another 2 h recovery. The maximum strain, creep stain, percentage of recovery and permanent set was measured using a linear variable displacement transducer. The viscoelastic properties were characterized via the Burgers model, and the instantaneous elastic, viscous as well as elastic delayed deformation were separated from the total strain. Data were analysed via ANOVA (or Welch's Test) and Tukey (or Games-Howell Test) with a significance level of 0.05. RESULTS: Sound dentine presented the lowest maximum strain, creep strain, permanent set and the highest percentage of recovery, followed by 3 resin composites with comparable parameters, while the cement showed a significantly higher maximum strain, permanent set and lower percentage of recovery (p < 0.001). The Burgers model presented acceptable fits for characterization viscoelastic processes of both dentine and resin-based dental materials. Viscous and elastic delayed strain of dentine was significantly lower than those for tested materials (p < 0.001) with the highest instantaneous elastic strain percentage. Similar viscous and delayed strain was found among the 4 resin-based materials (p > 0.05). SIGNIFICANCE: Sound dentine exhibited superior creep stability compared to resin-based dental materials. The viscous deformation in sound dentine could be ignored when loading parallel to dentine tubules.
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- $a Zhou, Jing $u Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Engineering Research Center of Technology and Materials for Oral Reconstruction, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China. Electronic address: zhouj355@mail2.sysu.edu.cn.
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- $a Kang, Dehua $u Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China. Electronic address: kangdh@mail.sysu.edu.cn.
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- $a Swain, Michael V $u AMME, University of Sydney, NSW 2006, Australia; Don State Technical University, Rostov-on Don, Russia. Electronic address: michael.swain@sydney.edu.au.
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- $a Menčík, Jaroslav $u Department of Mechanics, Materials and Machine Parts, Faculty of Transport Sciences, University of Pardubice, Czech Republic. Electronic address: jaroslav.mencik@upce.cz.
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- $a Jian, Yutao $u Institute of Stomatological Research, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China. Electronic address: jianyt@mail.sysu.edu.cn.
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- $a Zhao, Ke $u Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Engineering Research Center of Technology and Materials for Oral Reconstruction, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China. Electronic address: zhaoke@mail.sysu.edu.cn.
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