Influence of thermal and thermomechanical stimuli on a molar tooth treated with resin-based restorative dental composites

Varghese, Jerrin Thadathil; Babaei, Behzad; Farrar, Paul; Prentice, Leon H.; Prusty, B. Gangadhara

doi:10.1016/j.dental.2022.04.010

Cited by 15 publications

(5 citation statements)

References 74 publications

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“…The elastic modulus from the flexural and compressive tests provides insight into the materials' rigidity. 29 A material with a higher elastic modulus has been shown to require more stress for the same degree of deformation, 30,31 thereby giving a more rigid property. The results from this study showed that there is a strong correlation between the elastic modulus and the filler content wt.…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of self‐cure and dual cure‐dental composites on their physico‐mechanical behaviour

Thadathil Varghese,

Raju,

Farrar

et al. 2023

Australian Dental Journal

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BackgroundClinical practitioners may have become familiar with the rapid transformation of dental composites. However, they may not scientifically understand the factors influencing the mechanical and physical properties. Scientific knowledge of filler‐resin interaction can significantly improve clinical understanding of resin composites. Several independent studies have examined the mechanical and physico‐mechanical properties of dental resin composites; however, no comprehensive study has examined the influence of fillers and resin materials on the physico‐mechanical properties of both self‐cure and dual‐cure composites.MethodsThis study performed investigations on the physico‐mechanical behaviour of four commercially available dual‐cure dental composites (Bioactive, Fill Up!, Surefil One, Cention N) and two commercially available self‐cure dental composites (Stela Capsule and Stela Automix). Test specimens for flexural and compressive strength, microhardness, fracture toughness, and hydrolytic behaviour were prepared and tested as per respective standards. The data sets were statistically analysed using one‐way ANOVA and Tukey's post‐hoc comparison.ResultsThere was a substantial variation in flexural strength and modulus values in this study, ranging from 32.0 to 113.4 MPa and 2.36 to 12.07 GPa, respectively. Similarly, there were significant differences in compressive strength between the materials in this study, ranging from 119.3 to 223.5 MPa. The highest fracture toughness value was found to be 1.41 MPa.m0.5, while the lowest value was 0.43 MPa.m0.5. Variations in surface microhardness were significant (24.11–68.0 N/mm2), which correlated with the filler content. Water sorption and solubility demonstrated high variations among materials, with Surefil One exceeding ISO 4049 thresholds significantly.ConclusionsA linear correlation can be established between surface microhardness (HV) and flexural and compressive moduli, as well as filler content (wt.%). However, both flexural and compressive strengths are impacted by the resin's constituent monomers and the resin‐filler matrix's cross‐linking capability. Additionally, factors such as filler size, shape, and the cross‐linking ability of the resin‐filler matrix play a crucial role in fracture toughness and the propagation of cracks within the restoration. Also, resin monomers and filler particle size affect the hydrolytic degradation characteristics of composites, which can also affect their mechanical properties. © 2023 Australian Dental Association.

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Section: Discussionmentioning

confidence: 99%

Comparative analysis of self‐cure and dual cure‐dental composites on their physico‐mechanical behaviour

Thadathil Varghese,

Raju,

Farrar

et al. 2023

Australian Dental Journal

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“…However, the maximum temperature that living tissue can withstand has been determined as 50 ˚C. In line with similar studies and information, the temperatures chosen to simulate both hot and cool oral environments were 25 and 50 ˚C [59,60]. To simulate acidic beverage environments, 0.9 wt% NaCl solutions at pH 3 and 5 were prepared using lemon juice.…”

Section: Methodsmentioning

confidence: 99%

Corrosion behavior of fiber laser welded Ti-6Al-4V alloy rods with different pH and temperature in 0.9 wt% NaCl medium

Yontar,

Çevik

2023

Res. Eng. Struct. Mat.

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The corrosion resistance of laser welded samples was carried out in a shaken incubator in body-simulated liquid environments and kept at pH3-5 and 25-50˚C conditions for 24 hours. It was determined that acicular α' martensite structures were formed in the fusion regions and these structures increased the hardness of the alloy by 20% compared to the base metal. The welded samples had the highest tensile strength of 144 MPa. Weight changes after the corrosion test were calculated and the highest weight loss was found to be 0.0025 g for the sample with an initial weight of 4.1394 g. TiO2 oxides and {1 0 0} and {1 1 1} chamber-shaped salt crystals were formed larger and more intensely in the fusion zones than the base metal. Dental metallic implant welding with fiber laser will have higher corrosion resistance in oral use with different temperature and pH environments compared to screw joints.

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“…Thermal changes are a significant factor in the dynamic behavior of dental materials and natural tooth structures within the oral environment. This phenomenon involves the expansion and contraction of these materials in response to temperature fluctuations, a process that can have implications for the integrity of dental restorations and the overall oral health of patients (11). Dental materials have specific coefficients of thermal expansion, which dictate how much they expand or contract in response to changes in temperature.…”

Section: Thermal Changesmentioning

confidence: 99%

“…These inherent properties mean that dental restorations and the surrounding tooth structure are not immune to the effects of temperature fluctuations. As temperatures rise and fall due to factors like hot and cold foods or beverages, ambient temperature changes, or even exposure to hot and cold air during breathing, dental materials and tooth structures undergo corresponding expansion and contraction (11). This thermal cycling can create stress at the interface between dental restorations and tooth tissues.…”

Section: Thermal Changesmentioning

confidence: 99%

Microleakage Among Different Dental Restorative Materials: Causes, Detection, and Impact on Marginal Integrity

Aljehani,

Almakinah,

Alshahri

et al. 2023

JOHS

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Dental restorative materials are essential components in the field of dentistry, serving as compounds or substances used to address a wide spectrum of dental concerns, including cavities, tooth decay, fractures, and cosmetic enhancements. These materials, encompassing amalgam, composite resins, glass ionomer cement, and compomers, are carefully selected based on their specific properties and the requirements of the restorative procedure. However, dental restorations are intricate processes influenced by patient factors and material behaviour, which can lead to various complications. Among these, microleakage emerges as a prevalent and multifaceted issue, with causes ranging from polymerization shrinkage during material curing to thermal changes, cyclic loading, and moisture contamination. The consequences of microleakage are far-reaching, encompassing clinical challenges such as the development of secondary caries, tooth sensitivity, aesthetic concerns, and the potential for restoration failure. The susceptibility to microleakage varies among different dental restoration materials, with amalgam typically exhibiting lower susceptibility compared to more modern alternatives like composite resins and compomers. Glass ionomer cement, when employed with appropriate moisture control, can demonstrate improved resistance to microleakage over time. Detecting microleakage necessitates various methods, including radiography, dye penetration tests, electron microscopy, and microcomputed tomography. Effective prevention and management strategies involve the use of modern adhesive systems, precise restoration techniques, and patient education on maintaining optimal oral hygiene. Continual advancements in dental materials and techniques further contribute to the ongoing efforts to mitigate the challenges posed by microleakage in the ever-evolving landscape of modern dentistry, ultimately enhancing patient outcomes and ensuring the longevity and success of dental restorations while prioritizing overall oral health.

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Influence of thermal and thermomechanical stimuli on a molar tooth treated with resin-based restorative dental composites

Cited by 15 publications

References 74 publications

Comparative analysis of self‐cure and dual cure‐dental composites on their physico‐mechanical behaviour

Comparative analysis of self‐cure and dual cure‐dental composites on their physico‐mechanical behaviour

Corrosion behavior of fiber laser welded Ti-6Al-4V alloy rods with different pH and temperature in 0.9 wt% NaCl medium

Microleakage Among Different Dental Restorative Materials: Causes, Detection, and Impact on Marginal Integrity

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