Effects of aging and light-curing unit type on the volume and internal porosity of bulk-fill resin composite restoration

Al-Zain, Afnan O.; Alboloshi, Elaf A.; Amir, Walaa A.; Alghilan, Maryam A.; Münchow, Eliseu Aldrighi

doi:10.1016/j.sdentj.2022.01.004

Cited by 4 publications

(5 citation statements)

References 29 publications

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“…This may also have had an influence on the lower degree of conversion values produced by the Bluephase light source (F2). This lack of spatial and spectral homogeneity in the emission of light is a source of concern because some resins use photoinitiators that demand shorter wavelengths of light, which have an influence on the degree of conversion (Price et al, 2010;Al-Zain et al, 2022). This suggested the need to include the smaller short wavelengths in the LED curing lights used for curing Bulk Fill resins, and agrees with Sampaio et al (2017), in stating that the quantity of violet light was insufficient for curing Bulk Fill resins at deeper depths.…”

Section: (Ds) 4 M M ( D M ) 6 M M ( D P )mentioning

confidence: 88%

“…When there is reduced penetration of light and increased distance from the irradiated surface, a reduction in the degree of conversion would be expected, therefore, a reduction in the hardness values, which could also influence the lower microhardness values produced by the other light sources (Al-Zain et al, 2022).…”

Section: (Ds) 4 M M ( D M ) 6 M M ( D P )mentioning

confidence: 99%

“…In the present study, the factor light source was statistically significant, in which Source F2 showed lower mean values than those of F1 and F3. According to the literature, radiant exposure (irradiance x duration of exposure) in light polymerization may influence the degree of conversion (Lempel et al, 2019) and the efficacy of light polymerization sources may be evaluated by the degree of conversion by various methods, such as Fourier Transform Infrared spectroscopy (FTIR) and microhardness tests (Algamaiah et al, 2021;Al-Zain et al, 2022).…”

Section: (Ds) 4 M M ( D M ) 6 M M ( D P )mentioning

confidence: 99%

“…The LED sources may be divided into the single-peak blue LED emitting units, producing a very narrow band of wavelengths centralized between 450 and 470 nm; and the polywave (blue /violet) light-polymerization units. These use a combination of LED chips with different wavelengths of emission to produce a spectral output that covers the band of 440 and 470 nm, and the shorter wavelengths of below 420 nm (Shimokawa et al, 2017;Lempel et al, 2021;Al-Zain et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Effects of LED Lights on Bulk Fill Resin Polymerization

Arnez,

Almeida,

Dotta

et al. 2023

Int. J. Odontostomat.

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The present study analyzed the microhardness and degree of conversion of three Bulk Fill resins (M1 -Filtek Bulk Fill; M2 -Tetric N-Ceram Bulk Fill and M3 -Opus Bulk Fill) polymerized by single peak and polywave Light-emitting Diode Curing Lights. A total 90 test specimens (n=10) were obtained using a Teflon matrix for the purpose of testing microhardness; and for degree of conversion: 135 specimens (n=5) by using a 2 x 6 cm matrix. The specimens were light polymerized using 3 light sources (L1 -Optilight Max, L2 -Bluephase, L3 -VALO). They were kept in artificial saliva om an oven at 37±1°C during the experiment. The degree of conversion was measured by FTIR 24 h after obtaining each test specimen. The microhardness readouts were performed with a microdurometer at the time intervals of 48 hours (T0), 7 days (T1), 14 days (T2) and 21 days (T3). M1L3 was found to show the highest microhardness values in T2, and M1 showed the lowest degree of conversion in the deep third with L1. It was concluded that Filtek Bulk Fill resin showed the best results in comparison with the other resins.

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Section: (Ds) 4 M M ( D M ) 6 M M ( D P )mentioning

confidence: 88%

Section: (Ds) 4 M M ( D M ) 6 M M ( D P )mentioning

confidence: 99%

Section: (Ds) 4 M M ( D M ) 6 M M ( D P )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of LED Lights on Bulk Fill Resin Polymerization

Arnez,

Almeida,

Dotta

et al. 2023

Int. J. Odontostomat.

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“…The voids' location could affect the restoration's success and longevity if they are found close to the occlusal surface or at the bonding interface. Previous work showed that aging by thermocycling and cyclic loading impacts the number, volume, and total percentage porosity within bulk-ll RBC restorations but not signi cantly, regardless of the light-curing unit used [15]. A previous study suggested three bulk-ll application techniques based on the manufacturers' placement recommendation: the monoblock-two steps, the monoblock with sonic activation, or the monoblock-one step [16].…”

Section: Introductionmentioning

confidence: 99%

Assessment of internal porosities for different placement techniques of bulk-fill resin-based composites: a micro-computed tomography study

Al-Zain,

Baeesa,

Jassoma

et al. 2023

Clin Oral Invest

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Purpose: The aim was to compare the porosity of different bulk-ll resin-based composites (RBCs) placement techniques to the conventional incremental technique using microcomputed tomography (μ-CT).Methods: Occlusal cavities were prepared on extracted human molars that were allocated into ve placement technique groups (n=10): Monoblock-two-step technique: SureFil SDR ow+Ceram.X; Monoblock with sonic activation technique: SonicFill2; Monoblock-one-step technique: Tetric EvoCeram Bulk-Fill; Monoblock-two-step technique: Tetric EvoFlow Bulk-Fill+Tetric EvoCeram Bulk-Fill, and incremental technique: Filtek Z250. The number, volume of closed pores, and the total porosity was evaluated (μ-CT). Data were analyzed with analysis of variance on ranks (Student-Newman-Keuls method and Mann-Whitney rank-sum test) to verify the RBC viscosity and the socination placement technique signi cance. Porosity characteristics correlation was performed (Spearman correlation) (α= 0.05).Results: The SonicFill2 group presented a higher number of closed pores than the other groups (p<0.05).The volume and total porosity characteristics were similar among all groups (p>0.05). The overall porosity within the restoration bulk seemed greater in the following order: Filtek Z250>SonicFill2>Tetric EvoFlow Bulk-Fill+Tetric EvoCeram Bulk-Fill>Tetric EvoCeram Bulk-Fill>SureFil SDR Flow+Ceram.X.Sonication tended to increase the number (p=0.005) and volume (p=0.036) of closed pores. Increased viscosity of the materials tended to increase the closed pores volume (p=0.036). There was a strong correlation between the number and volume of closed pores (R 2 =0.549, p<001).Conclusions: The different placement techniques resulted in signi cantly less internal porosity than the monoblock with sonic activation technique (SonicFill2). Sonication during application contributed to the higher number and volume of closed pores than the passive bulk-ll RBCs application.

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Investigating the implant position reproducibility of optical impressions obtained using an intraoral scanner and 3D-printed models fabricated using an intraoral scanner

Iwamoto¹,

Atsuta²,

Kaneko³

et al. 2023

Int J Implant Dent

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Purpose This study aims to examine the effect of the size of the intraoral scanning area on implant position reproducibility and compare the implant position reproducibility of plaster models fabricated using the silicone impression technique, the digital model of an intraoral scanner, and three-dimensional (3D)-printed models fabricated using an intraoral scanner. Methods Scanbodies were attached to an edentulous model with six implants (master model) and were scanned using a dental laboratory scanner to obtain basic data. The plaster model was fabricated using the open-tray method (IMPM; n = 5). The master model was then scanned in various implant areas using an intraoral scanner to obtain data (IOSM; n = 5); the scanning data of six scanbodies were used to fabricate the 3D-printed models (3DPM; n = 5) using a 3D printer. Scanbodies were attached to the implant analogs of the IMPM and 3DPM models and data were obtained using a dental laboratory scanner. The basic data and IMPM, IOSM, and 3DPM data were superimposed to calculate the concordance rate of the scanbodies. Results The concordance rate of intraoral scanning decreased as the number of scanbodies increased. Significant differences were observed between the IMPM and IOSM data, and between the IOSM and 3DPM data; however, the IMPM and 3DPM data did not differ significantly. Conclusions The implant position reproducibility of the intraoral scanner decreased with an increase in the scanning area. However, ISOM and 3DPM may provide higher implant position reproducibility than plaster models fabricated using IMPM.

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Effects of aging and light-curing unit type on the volume and internal porosity of bulk-fill resin composite restoration

Cited by 4 publications

References 29 publications

Effects of LED Lights on Bulk Fill Resin Polymerization

Effects of LED Lights on Bulk Fill Resin Polymerization

Assessment of internal porosities for different placement techniques of bulk-fill resin-based composites: a micro-computed tomography study

Investigating the implant position reproducibility of optical impressions obtained using an intraoral scanner and 3D-printed models fabricated using an intraoral scanner

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