Modeling dental composite shrinkage by digital image correlation and finite element methods

Chen, Terry Yuan Fang; Huang, Po-Kai; Chuang, Shu Fen

doi:10.1016/j.optlaseng.2014.04.006

Cited by 15 publications

(7 citation statements)

References 36 publications

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“…The significant finding of this experiment was that interfacial debonding of restoration can be predicted from the difference between the measured and expected surface displacement of composite resin restoration. The above studies showed that the DIC technique can be effectively used to measure the polymerization shrinkage kinetics of restorations with different boundaries [57].…”

Section: Shrinkage Behavior Of Light-cured Dental Resin Compositesmentioning

confidence: 97%

“…5) [55]. They also studied the shrinkage behaviors, shrinkage stress, and microleakage of composite restorations under the different light-curing protocol, a DIC technique was combined with the FEA results [56,57]. The experimental results showed that the intensity and direction of light influenced the shrinkage and contraction of composite resin, and the degree of shrinkage strain and stress tended to decrease with an oblique irradiation direction in comparison with vertical direction during curing of composite restoration [56].…”

Section: Shrinkage Behavior Of Light-cured Dental Resin Compositesmentioning

confidence: 99%

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Digital image correlation in dental materials and related research: A review

et al. 2021

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Section: Shrinkage Behavior Of Light-cured Dental Resin Compositesmentioning

confidence: 97%

Section: Shrinkage Behavior Of Light-cured Dental Resin Compositesmentioning

confidence: 99%

Digital image correlation in dental materials and related research: A review

et al. 2021

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“…Shrinkage stress values can be accessed by several analytical techniques such as finite element analysis (FEA),[ 48 49 50 51 52 ] photoelastic analysis,[ 53 54 55 ] and more commonly, using an experimental setup known as “tensilometer,”[ 3 56 57 58 ] Bioman device,[ 59 60 ] and crack analyzing method. [ 46 61 62 ]…”

Section: Measurement Of Shrinkage-stressmentioning

confidence: 99%

“…Chen et al . [ 50 ] combined DIC and FEA to model the shrinkage behavior of a microhybrid composite under different light-curing regimens. In their study, composite fillings were placed under both unbonded and bonded conditions.…”

Section: Measurement Of Shrinkage-stressmentioning

confidence: 99%

Analytical methods for the measurement of polymerization kinetics and stresses of dental resin-based composites: A review

Ghavami-Lahiji

Hooshmand

2017

Dent Res J

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Resin-based composites are commonly used restorative materials in dentistry. Such tooth-colored restorations can adhere to the dental tissues. One drawback is that the polymerization shrinkage and induced stresses during the curing procedure is an inherent property of resin composite materials that might impair their performance. This review focuses on the significant developments of laboratory tools in the measurement of polymerization shrinkage and stresses of dental resin-based materials during polymerization. An electronic search of publications from January 1977 to July 2016 was made using ScienceDirect, PubMed, Medline, and Google Scholar databases. The search included only English-language articles. Only studies that performed laboratory methods to evaluate the amount of the polymerization shrinkage and/or stresses of dental resin-based materials during polymerization were selected. The results indicated that various techniques have been introduced with different mechanical/physical bases. Besides, there are factors that may contribute the differences between the various methods in measuring the amount of shrinkages and stresses of resin composites. The search for an ideal and standard apparatus for measuring shrinkage stress and volumetric polymerization shrinkage of resin-based materials in dentistry is still required. Researchers and clinicians must be aware of differences between analytical methods to make proper interpretation and indications of each technique relevant to a clinical situation.

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“…Due to the high percentage of resin matrix, bulk-fill flowable RBCs should achieve a high shrinkage. Several studies demonstrated that the lower shrinkage is achieved at the bottom of the cavity, because the light cure intensity decreases as the curing depth increases, thus generating a polymerization degree gradient through the composite [ 15 , 16 , 17 ]. A polymerization degree gradient through the whole bulk-fill composite thickness could involve a lower monomer-to-polymer conversion and a consequent genotoxicity release.…”

Section: Introductionmentioning

confidence: 99%

Cuspal Deflection and Temperature Rise of MOD Cavities Restored through the Bulk-Fill and Incremental Layering Techniques Using Flowable and Packable Bulk-Fill Composites

et al. 2020

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Background: The aim of this study was to investigate cuspal deflection caused by material shrinkage and temperature rise occurring in the pulp chamber during photopolymerization. The aim of this study was also to investigate the effect of flowable and packable bulk-fill composites on cuspal deflection occurring in mesio-occlusal–distal (MOD) cavities restored through the bulk-fill or through the incremental layering technique. Additionally, mechanical and thermal properties of bulk-fill composites were considered. Methods: Two bulk-fill composites (high-viscosity and low-viscosity), largely differing in material composition, were used. These composites were characterized through linear shrinkage and compressive test. Cuspal deformation during restoration of mesio-occlusal–distal cavities of human premolars was evaluated using both the bulk-fill and the incremental layering techniques. Temperature rise was measured through thermocouples placed 1 mm below the cavity floor. Results: Shrinkage of the flowable composite was significantly higher (p < 0.05) than that of packable composite, while mechanical properties were significantly lower (p < 0.05). For cusp distance variation, no significant difference was observed in cavities restored through both restorative techniques, while temperature rise values spanned from 8.2 °C to 11.9 °C. Conclusions: No significant difference in cusp deflection between the two composites was observed according to both the restorative techniques. This result can be ascribed to the Young’s modulus suggesting that the packable composite is stiffer, while the flowable composite is more compliant, thus balancing the cusp distance variation. The light curing modality of 1000 mW/cm2 for 20 s can be considered thermally safe for the pulp chamber.

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Modeling dental composite shrinkage by digital image correlation and finite element methods

Cited by 15 publications

References 36 publications

Digital image correlation in dental materials and related research: A review

Digital image correlation in dental materials and related research: A review

Analytical methods for the measurement of polymerization kinetics and stresses of dental resin-based composites: A review

Cuspal Deflection and Temperature Rise of MOD Cavities Restored through the Bulk-Fill and Incremental Layering Techniques Using Flowable and Packable Bulk-Fill Composites

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