The effect of chewing simulation on surface roughness of resin composite when opposed by zirconia ceramic and lithium disilicate ceramic

Background: Repair bonding to lithium disilicate ceramic (LDS) remains an issue. This study examined whether the adaptation of a resin composite to LDS can be improved by a silane pretreatment and warm air-drying. Methods: LDS blocks (IPS e.max CAD) with prefabricated tapered cavities were bonded using a silane-containing universal adhesive (Clearfil Universal Bond Quick ER; UBQ) or the bonding agent of a two-step self-etch adhesive (Clearfil SE Bond 2), with and without a silane pretreatment (Clearfil Ceramic Primer; CP). CP and the adhesives were air-dried with normal air (23 ± 1 °C) or warm air (60 ± 5 °C), light-cured, and the cavities were filled with a flowable composite. Interfacial gap formation was evaluated using swept-source optical coherence tomography immediately after filling, after 24 h, 5000 and 10,000 thermal cycles, and an additional 1 year of water storage. Results: Without the silane pretreatment, all specimens soon detached from the cavities. Warm air-drying significantly decreased gap formation compared to normal air-dried groups (p < 0.001) and improved long-term stability (p < 0.001). The lowest gap formation was observed with UBQ when the silane pretreatment was combined with warm air-drying. Conclusions: Composite adaptation to LDS was insufficient without silanization, but it was stable in the long term if the silane pretreatment and warm air-drying were combined.

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Effects of surface roughness on the time-dependent wear performance of lithium disilicate glass ceramic for dental applications

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2021.104638 ◽

2021 ◽

pp. 104638

Author(s):

M. Meng ◽

X.S. Wang ◽

K.Y. Li ◽

Z.X. Deng ◽

Z.Z. Zhang ◽

...

Keyword(s):

Surface Roughness ◽

Glass Ceramic ◽

Lithium Disilicate ◽

Time Dependent ◽

Wear Performance ◽

Dental Applications

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Influence of Post and Resin Cement on Stress Distribution of Maxillary Central Incisors Restored with Direct Resin Composite

Operative Dentistry ◽

10.2341/08-73 ◽

2009 ◽

Vol 34 (2) ◽

pp. 223-229 ◽

Cited By ~ 39

Author(s):

A. O. Spazzin ◽

D. Galafassi ◽

A. D. de Meira-Júnior ◽

R. Braz ◽

C. A. Garbin

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Elastic Modulus ◽

Resin Composite ◽

Resin Cement ◽

Zirconia Ceramic ◽

Element Analysis ◽

Fiber Posts ◽

Stress Levels ◽

Glass Fiber Posts

Clinical Relevance According to finite element analysis, the zirconia ceramic post created higher stress levels in the post and slightly less in dentin compared with glass fiber posts. Resin cement with a high elastic modulus created higher stress levels in the cement layer. The different film thicknesses of cement did not create significant changes in stress levels.

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Surface Roughness of Two CAD/CAM Restorative Materials as Affected by Chewing Simulation v1

10.17504/protocols.io.b3jiqkke ◽

2022 ◽

Author(s):

eaeldwakhly not provided

Keyword(s):

Surface Roughness ◽

Computer Aided Design ◽

Surface Characteristics ◽

Ceramic Materials ◽

Study Groups ◽

Significance Level ◽

Chewing Simulation ◽

Computer Aided ◽

Cad Cam ◽

The Individual

This study was conducted to assess the surface characteristics in terms of roughness of two CAD/CAM (Computer-Aided-Design/Computer-Aided Manufacturing)restorative material spre and post chewing simulation exposure. Methods: Specimens were prepared from two CAD/CAM ceramic materials: Cerec Blocs C and IPS e-max ZirCAD. A total of 10 disks were prepared for each study group. 3D optical noncontact surface profiler was used to test the surface roughness (ContourGT, Bruker, Campbell, CA, USA). A silicone mold was used to fix the individual samples using a self-curing resin. Surface roughness (SR) was examined pre and post exposure to chewing simulation. 480,000 simulated chewing cycles were conducted to mimic roughly two years of intraoral clinical service. The results data was first tested for normality and equal variance (Levene’s test >0.05) then examined with paired and independent sample t-test at a significance level of (p < 0.05). Results:The two CAD-CAM materials tested exhibited increased surface roughness from baseline. The highest mean surface roughness was observed in Cerec blocs C group after chewing simulation (2.34 µm± 0.62 µm). Whereas the lowest surface roughness was observed in IPS e.max ZirCAD group before chewing simulation (0.42 µm± 0.16 µm). Both study groups exhibited significantly different surface roughness values (p< 0.05). There was a statistically higher surface roughness values after the chewing simulation in Cerec blocs C when compared to IPS e.max ZirCAD groups (p = 0.000).Conclusion:Even though both tested CAD/CAM materials differ in recorded surface roughness values, results were within clinically accepted values.

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The Effects of Surface Roughness of Composite Resin on Biofilm Formation of Streptococcus mutans in the Presence of Saliva

Operative Dentistry ◽

10.2341/11-371-l ◽

2012 ◽

Vol 37 (5) ◽

pp. 532-539 ◽

Cited By ~ 36

Author(s):

JW Park ◽

CW Song ◽

JH Jung ◽

SJ Ahn ◽

JL Ferracane

Keyword(s):

Surface Roughness ◽

Silicon Carbide ◽

Streptococcus Mutans ◽

Biofilm Formation ◽

Composite Resin ◽

Resin Composite ◽

Fluid Phase ◽

Confocal Laser ◽

Carbohydrate Source ◽

Effect Of Surface

SUMMARY The purpose of this study was to investigate the effects of surface roughness of resin composite on biofilm formation of Streptococcus mutans in the presence of saliva. To provide uniform surface roughness on composites, disks were prepared by curing composite against 400-grit silicon carbide paper (SR400), 800-grit silicon carbide paper (SR800), or a glass slide (SRGlass). The surface roughness was examined using confocal laser microscopy. For biofilm formation, S. mutans was grown for 24 hours with each disk in a biofilm medium with either glucose or sucrose in the presence of fluid-phase or surface-adsorbed saliva. The adherent bacteria were quantified via enumeration of the total viable counts of bacteria. Biofilms were examined using scanning electron microscopy. This study showed that SR400 had deeper and larger, but fewer depressions than SR800. Compared to SRGlass and SR800, biofilm formation was significantly increased on SR400. In addition, the differences in the effect of surface roughness on the amount of biofilm formation were not significantly influenced by either the presence of saliva or the carbohydrate source. Considering that similar differences in surface roughness were observed between SR400 and SR800 and between SR800 and SRGlass, this study suggests that surface topography (size and depth of depressions) may play a more important role than surface roughness in biofilm formation of S. mutans.

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Effects of Different Polishing Protocols on Lithium Disilicate Ceramics

Brazilian Dental Journal ◽

10.1590/0103-6440201300370 ◽

2015 ◽

Vol 26 (5) ◽

pp. 478-483 ◽

Cited By ~ 3

Author(s):

Tânia Mara da Silva ◽

Ana Carolina Rodrigues Danzi Salvia ◽

Rodrigo Furtado de Carvalho ◽

Eduardo Galera da Silva ◽

Clóvis Pagani

Keyword(s):

Surface Roughness ◽

Lithium Disilicate ◽

Sem Analysis ◽

Surface Treatments ◽

Control Group ◽

Morphological Pattern ◽

Tukey Test ◽

Polishing Procedures ◽

Diamond Paste

Abstract: The aim of this study was to evaluate the effect of different polishing protocols on surface roughness and morphology of lithium disilicate ceramics (IPS e.max CAD). Fifty ceramic bars (2.0x3.0x2.5 mm) were produced and randomly divided into five groups (n=10), according to surface treatments: C: Control; Cer: Ceramaster (60 s); CW: cloth wheel with large-grit diamond (30 s) + cloth wheel with fine-grit diamond paste (30 s); E: grey Exa-Cerapol (20 s) + pink Exa-Cerapol (20 s) + Cerapol Super (20 s); F: Felt wheel with large-grit diamond paste (30 s) + Felt wheel with fine-grit diamond paste (30 s). The samples were evaluated quantitatively for surface roughness (Ra) and qualitatively by SEM, at different moments: initial (prior to roughening), after roughening and after polishing procedures. Ra means were submitted to two-way ANOVA and Tukey test (p<0.05). After the different polishing protocols, no statistically significant differences were observed between the Cer and E groups (p=0.6347), E and CW groups (p=0.1366), and CW and FW groups (p=0.5433). Comparing different stages in the same group, it was possible to observe that CW (p<0.0001) and FW groups (p<0.0001) showed significant differences. SEM analysis revealed that both Cer and E groups exhibited a surface morphological pattern similar to that of control group. All polishing systems were effective in reducing the surface roughness of the studied ceramic type.

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The Influence of Different Surface Cleansing Agents on Shear Bond Strength of Contaminated Lithium Disilicate Ceramic: An In Vitro Study

International Journal of Dentistry ◽

10.1155/2021/7112400 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Taksid Charasseangpaisarn ◽

Pattarawadee Krassanairawiwong ◽

Chanidapa Sangkanchanavanich ◽

Atima Kurjirattikan ◽

Kanyarak Kunyawatyuwapong ◽

...

Keyword(s):

Bond Strength ◽

Shear Bond Strength ◽

Sodium Hydroxide Solution ◽

Resin Composite ◽

In Vitro Study ◽

Lithium Disilicate ◽

Surface Element ◽

Similar Amount ◽

Modes Of Failure

Background and Purpose. Contamination of the lithium disilicate (LDS) during the try-in procedure is unavoidable and may weaken the bond strength of restoration. The purpose of this study was to investigate the efficacy of different surface cleansing agents on the shear bond strength (SBS) of contaminated LDS. Materials and Methods. Seventy LDS specimens were randomly divided into seven groups. The first group was noncontaminated surface (PC). The six other groups were contaminated with the saliva and silicone disclosing medium and treated with no surface cleansing agent (NC); phosphoric acid (PO); Ivoclean (IV); sodium hydroxide solution (NA); Restorative Cleansing Agent (RC); and hydrofluoric acid (HF). Then, LDS specimens were cementated with Panavia V5 to resin composite rod. Each specimen was subjected to an SBS test. The modes of failure was inspected under light microscope. The surface element of each group was examined by SEM-EDS. Results. The results were analyzed with one-way ANOVA and Tamhane’s T2. The mean SBS value of NC was significantly lower than others ( p < 0.05 ), and HF was significantly higher than others ( p < 0.05 ). However, PC, PO, IV, NA, and RC were not significantly different from each other ( p > 0.05 ). The mode of failure was mostly adhesive failure in every group. The surface showed similar amount of elements in every group. Conclusions. The SBS of LDS was reduced by saliva and silicone disclosing medium contamination which can be restored using acid- and alkaline-based surface cleansing agents before the cementation procedure.

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Lubricated Wear of Machinable Lithium Disilicate Glass Ceramic

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.739.18 ◽

2017 ◽

Vol 739 ◽

pp. 18-22

Author(s):

Laura Elbourne-Binns ◽

Juan Carlos Baena ◽

Ling Yin ◽

Zhong Xiao Peng

Keyword(s):

Surface Roughness ◽

Glass Ceramic ◽

Sliding Friction ◽

Surface Preparation ◽

Lithium Disilicate ◽

Wear Volume ◽

Oral Environment ◽

Dry Conditions ◽

Applied Forces ◽

Lubrication Conditions

An experimental investigation was performed to study the wear of a promising dental ceramic, i.e., machinable lithium disilicate glass ceramic, under lubrication conditions, in particular, to examine effects of the surface finish and applied load on wear. Our previous work has shown that a fine finish in a dry condition did not necessarily translate to the lowest wear volume due to changes in the dominant wear mechanisms. This study tested the ceramic specimens with four average surface roughness values of Sa = 143 nm, 217 nm, 353 nm, and 692 nm on a reciprocating sliding friction rig against alumina balls with two applied forces of 5 N and 25 N in a bath of distilled water. Comparing with the results obtained in the dry conditions, this study shows that surface roughness of approximately 200 nm may be suitable for surface preparation of crowns made from the material in the wet and dry wear conditions in the oral environment.

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Comparative evaluation of surface roughness and texture of polished nanofill and nanohybrid composites using profilometer and scanning electron microscope: in - vitro study

RGUHS Journal of Dental Sciences ◽

10.26715/rjds.9_2_3 ◽

2017 ◽

Vol 9 (2) ◽

pp. 4-10

Author(s):

Krishna Prasada L ◽

Jyothsna S Jathanna ◽

Naveen Kumar ◽

Ramya M.K ◽

Elizabeth Issac

Keyword(s):

Surface Roughness ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Resin Composite ◽

In Vitro Study ◽

Average Value ◽

Three Samples ◽

Group B ◽

Scanning Electron

BACKGROUND: To determine the effectiveness of three polishing systems on three different composite materials by evaluating surface roughness using a Profilometer and Scanning electron microscope. METHODOLOGY: A total of Sixty-three resin composite disks were prepared in rectangular acrylic mould of 8×2mm dimension, with 4mm thickness. Specimens were made of light activated resin composite Filtek Z-250-XT, Tetric-N-Ceram bulkfill, Ceram X Duo. The sixty-three samples were divided into three groups of twenty-one samples each i.e. Group A (Filtek Z-250-XT), Group B (TetricN-Ceram bulkfill) and Group C (Ceram-X-Duo).Out of 21 samples of each of the material, 7 specimens were polished with multi enhance polishing agents, 7 specimens were polished with super snap polishing agents and 7 specimens were polished with sof-lexdiscs.Surface roughness of each sample after polishingwasevaluatedusingProfilometer and Scanning electron microscope. RESULTS: One-way anova and kruskalwallis test was used for statistical analysis. Ceram-X-Duo gave least roughness average value with Super snap polishing system when compared to multi enhance and sof-lex polishing system. CONCLUSION: Super snap polishing system is a better polishing system than multi enhance and soflex and Ceram-X-Duo composite material offers better polishability compared to Filtek Z-250-XT and Tetric-N-Ceram bulk fill.

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