Flexural Strength of Preheated Resin Composites and Bonding Properties to Glass-Ceramic and Dentin

Kramer, Matthias Richard; Edelhoff, Daniel; Stawarczyk, Bogna

doi:10.3390/ma9020083

Cited by 21 publications

(27 citation statements)

References 42 publications

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“…The results of the study of Young's modulus dependence on temperature confirm the conclusion that the physical properties of the composite material significantly improve after heating [32] that accepts the second null hypothesis. There is an increase in the rate of Young's modulus by 15% for samples with preliminary pre-polymerization heating.…”

supporting

confidence: 72%

The Substantiation of the Pre-Polymerization Heating Efficiency of the Dental Nanocomposite Material

Khabadze

Kulíková

Abdulkerimova

et al. 2020

Pesqui. Bras. Odontopediatria Clín. Integr.

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To evaluate the effect of pre-polymerization heating of nanocomposite filling materials on their strength properties within one manufacture group. Material and Methods: Two nanocomposite filling materials Enamel Plus HRi Universal Dentin ® and Universal Enamel ® were used. The linear thermal expansion coefficient (LTEC), Young's modulus and penetration depth were determined during the tests. Changes in the structure of materials were evaluated using electron scanning microscopy. Results: Dentin nanocomposite samples after pre-heating and polymerization have higher LTEC after 30°C compared to dentine nanocomposite untreated samples with statistically significance started at 62°C (p<0.05) and higher temperature. Pre-polymerization heated samples had a statistically higher LTEC (p<0.05) at 57°С. It was revealed that Young's modulus of the dentin nanocomposite samples after thermal processing at 55°C was higher in total after the first heating cycle by 15% compared to the untreated dentin nanocomposite samples (p<0.05). The volume of total porosity after pre-heating decreased to 5-7% (p<0.05). Conclusion: The material that has undergone preliminary heat processing is significantly less deformed under load than the material that does not have thermal processing during the research was established and also has a denser structure.

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supporting

confidence: 72%

The Substantiation of the Pre-Polymerization Heating Efficiency of the Dental Nanocomposite Material

Khabadze

Kulíková

Abdulkerimova

et al. 2020

Pesqui. Bras. Odontopediatria Clín. Integr.

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“…24 Compared to RMGIC based sealants, resin based sealants exhibited low microleakage scores. This could be attributed to the fact that flowable resins have a low contact angle at substrate 25 and hence adapt well to enamel at the walls of fissures. Fig- 1 Moreover, compared to RMGIC, the flowable resin forms a stronger micromechanical bond with the tooth structure.…”

Section: Discussionmentioning

confidence: 99%

Ameloplasty is counterproductive in reducing microleakage around Resin Modified Glass Ionomer and Resin based fissure sealants

Khan

Abidi

2020

Pak J Med Sci

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Objective: To compare the microleakage around resin modified glass ionomer cement (RMGIC) based sealants and flowable resin based sealants placed with or without ameloplasty in extracted human teeth. Methods: This in-vitro experimental study was conducted at the Operative Dentistry Department, Dow University of Health Sciences, Karachi, Pakistan from June 2017 to December 2018. Sixty extracted human molars and premolars were assigned to four groups (n=15) each, according to the type of fissure sealant (flowable resin based sealant or resin modified glass ionomer based sealant) used and either placed with or without ameloplasty. Specimens were thermocycled and then immersed in 1% methylene blue for 24 hours. Specimens were then sectioned and examined using stereo-microscope (50X) for microleakage that was scored on an ordinal scale. Mann-Whitney U test and Ordinal regression were applied. Level of significance kept at 0.05. Results: There was a statistically significant difference (p-value <0.001) between the two sealant types for the microleakage scores. Sealants placed with ameloplasty demonstrated significantly higher microleakage values (p-value <0.001). Conclusion: Microleakage was found to be more pronounced in RMGIC based sealants compared to the resin based sealants. Ameloplasty resulted in higher leakage around the sealants irrespective of the chemistry of material. doi: https://doi.org/10.12669/pjms.36.3.1268 How to cite this:Khan TN, Khan FR, Abidi SYA. Ameloplasty is counterproductive in reducing microleakage around Resin Modified Glass Ionomer and Resin based fissure sealants. Pak J Med Sci. 2020;36(3):---------. doi: https://doi.org/10.12669/pjms.36.3.1268 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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“…Resin composite has several advantages over amalgam, such as esthetics and biosafety; it also has a reasonable price compared to gold alloy, which makes this material popular among dentists [2]. However, there are some issues with mechanical properties and high polymerization shrinkage that limit the success of the restoration [3,4]. Conventional resin composites have inadequate mechanical properties that will lead to restoration deformation and body fracture under occlusal load [5].…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical characteristics of short fiber-reinforced resin composite in comparison with bulk-fill composites

et al. 2021

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Purpose: The objective of this study was to evaluate the physical and mechanical properties of a short fiber-reinforced resin composite: everX-Posterior and compare it with two bulk-fill composites, namely, Filtek Bulk-fill and Beautifil-Bulk, which are intended for large posterior restorations. Methods: Investigated properties were flexural strength, flexural modulus, surface roughness, volumetric shrinkage and depth of cure. Scanning electron microscopy images of each specimen after the flexural test were used for cross-sectional comparison. Results were analyzed using ANOVA following Tukey post-hoc test. Results: Flexural strength of everX-Posterior was comparable with two other resin composites, showing higher flexural modulus. EverX-Posterior showed the highest surface roughness after polishing and the lowest volumetric shrinkage (2.29%) among all composites used in this study. Data also showed that the everX-Posterior depth of cure was 4.24 mm, which was the highest among the three groups. Conclusion:Based on the results of this study, it was concluded that everX-Posterior as a short fiber-reinforced composite showed improvements and satisfactory performance in mechanical and physical properties, which make it a reliable base material candidate for large posterior restorations.

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Flexural Strength of Preheated Resin Composites and Bonding Properties to Glass-Ceramic and Dentin

Cited by 21 publications

References 42 publications

The Substantiation of the Pre-Polymerization Heating Efficiency of the Dental Nanocomposite Material

The Substantiation of the Pre-Polymerization Heating Efficiency of the Dental Nanocomposite Material

Ameloplasty is counterproductive in reducing microleakage around Resin Modified Glass Ionomer and Resin based fissure sealants

Physical and mechanical characteristics of short fiber-reinforced resin composite in comparison with bulk-fill composites

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