scholarly journals Effect of Vital Tooth Bleaching on Surface Roughness and Streptococcal Biofilm Formation on Direct Tooth-Colored Restorative Materials

2018 ◽  
Vol 43 (1) ◽  
pp. 51-59 ◽  
Author(s):  
I Wongpraparatana ◽  
O Matangkasombut ◽  
P Thanyasrisung ◽  
M Panich
Keyword(s):  
Surface Roughness ◽  
Biofilm Formation ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
Tooth Bleaching ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Before And After ◽  
The Mean ◽  
Post Hoc

SUMMARY Objective: To compare the effect of simulated bleaching with a 10% carbamide peroxide (CP) or a 40% hydrogen peroxide (HP) system on surface roughness of resin composite and resin-modified glass ionomer cement (RMGI) and streptococcal biofilm formation on these surfaces. Methods and Materials: Streptococcus mutans , Streptococcus sanguinis , and trypticase soy broth control for 24 hours. Biofilm formation was quantified by crystal violet staining, and the structure was visualized by scanning electron microscopy. The differences between the mean changes in Ra between the 10% CP and 40% HP groups of each material were evaluated with an independent t -test. The quantity of biofilm formation on each material was analyzed with one-way analysis of variance with the post hoc Tukey test ( α =0.05).Specimens of nanofilled resin composite and RMGI (n=108 each) were randomly divided into three groups (n=36 each): no treatment control, 10% CP, and 40% HP. The surface roughness values (Ra) were measured before and after treatments. The specimens in each group were randomly divided into three subgroups (n=12) and incubated with Results: S. mutans biofilm formation, bleaching with 10% CP and 40% HP increased biofilm on both materials compared to controls. However, S. sanguinis biofilm formation was significantly higher on bleached resin composite but not on RMGI specimens.Surface roughness significantly increased after bleaching in all groups. There was no significant difference between the 10% CP and 40% HP groups of each material. For Conclusions: S. sanguinis biofilm on RMGI.Simulated bleaching with 10% CP or 40% HP increased both surface roughness and biofilm formation on resin composite and RMGI, except for

scholarly journals Effects of Incorporation of Marine Derived Hydroxyapatite on the Microhardness, Surface Roughness, and Fluoride Release of Two Glass-Ionomer Cements

2021 ◽  
Vol 11 (22) ◽  
pp. 11027
Author(s):  
Maja Bilić-Prcić ◽  
Ivan Šalinović ◽  
Sevil Gurgan ◽  
Uzay Koc Vural ◽  
Silvana Jukić Krmek ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Glass Ionomer Cement ◽  
Fluoride Release ◽  
Test Results ◽  
Glass Ionomer ◽  
Experimental Glass ◽  
Hardness Tester ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Post Hoc

Background: The aim of this study was to evaluate the effects of incorporation of hydroxyapatite (HA) derived from cuttlefish bone on the microhardness, surface roughness (SR), and fluoride release (FR) of conventional cure, and resin-modified glass-ionomer cement. Methods: There were four groups for each tested material; experimental glass-ionomer were made by addition and of 2, 5, and 10 wt % HA respectively to conventional glass-ionomers Fuji II LC and Fuji IX GP Extra. One group was prepared without the addition of HA particles. For SR and microhardness measurements sectional Teflon molds (5 mm in diameter and 2 mm deep) were used to prepare 10 samples per group (n = 80). The samples were stored in distilled water at 37 °C for 7 days prior to testing. The SR was measured using a contact type profilometer and the microhardness was determined using a Vickers micro-hardness tester at a load of 980 g for 15 s. For FR measurements, there were six samples per group (n = 48), prepared in Teflon molds (8 mm in diameter and 2 mm deep). The FR was measured with an ionoselective electrode in triplicates after 24 h, 7 days, and 45 days. Statistical analysis was performed using one-way ANOVA with Tukey post-hoc test. Results and Conclusion: Microhardness values obtained for Fuji II modified with 10 wt % HA were significantly higher compared to the other two groups tested. Comparison of materials with respect to SR showed significant difference between them (p < 0.0001) with Fuji II and Fuji IX modified with HA having higher SR values. Regarding FR, Fuji IX showed statistically significant higher results than Fuji II, independently of HA modification, and groups modified with 2 and 5 wt % HA showed significantly increased fluoride release in all three time points.

scholarly journals Effect of Toothbrushing-mouthrinse-cycling on Surface Roughness and Topography of Nanofilled, Microfilled, and Microhybrid Resin Composites

2014 ◽  
Vol 39 (5) ◽  
pp. 521-529 ◽  
Author(s):  
EM da Silva ◽  
CUF de Sá Rodrigues ◽  
DA Dias ◽  
S da Silva ◽  
CM Amaral ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Resin Composite ◽  
Artificial Saliva ◽  
Filler Particle ◽  
Three Dimensional ◽  
Resin Composites ◽  
Topographic Analysis ◽  
Before And After ◽  
Multifactor Analysis ◽  
Post Hoc

SUMMARY The purpose of this study was to evaluate the influence of toothbrushing-mouthrinse-cycling (TMC) on the surface roughness and topography of three resin composites with different filler particle systems (Z350, nanofilled [Nf]; Durafill, microfilled [Mf], and Empress Direct, microhybrid [Mh]). Twenty specimens of each resin composite (8.0 mm diameter and 2 mm height) were randomly divided into four groups (n=5) according to the mouthrinses: alcohol-free (Plax – P) and alcohol-containing (Listerine – L and Plax Fresh Mint – PM) and artificial saliva (control – AS). The specimens were submitted to TMC for nine weeks. A surface roughness tester and a three-dimensional profilometer were used to measure the roughness (Ra) and the topography (Sa) before and after TMC. The data were analyzed by multifactor analysis of variance and Tukey post hoc test (α=0.05). In all media, Mh presented greater roughness than Mf (p&lt;0.05). The highest value of roughness was presented by Mh immersed in L (p&lt;0.05). The lowest values of roughness were presented by Mf (p&lt;0.05). The three resin composites presented the highest roughness after immersion in mouthrinses containing alcohol (PM and L) (p&lt;0.05). For the three resin composites, the increase in roughness was noticeable after the fifth week. Topographic analysis showed that the smoothest surfaces were present after immersion in AS.

scholarly journals Evaluation of enamel roughness after the removal of brackets bonded with different materials: In vivo study

2021 ◽  
Vol 32 (5) ◽  
pp. 34-40
Author(s):  
Rodrigo Vieira Caixeta ◽  
Sandrine Bittencourt Berger ◽  
Murilo Baena Lopes ◽  
Eloisa Aparecida Carlesse Paloco ◽  
Élcio Mário Faria-Júnior ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Initial Conditions ◽  
Glass Ionomer Cement ◽  
Enamel Surface ◽  
In Vivo Study ◽  
Adhesive Remnant Index ◽  
Resin Modified Glass Ionomer ◽  
Before And After ◽  
Orthodontic Patients

Abstract The aims of this in vivo study were to evaluate the effect of bonding with resin-modified glass ionomer cement (RMGIC) and to assess enamel surface roughness before and after the removal of brackets bonded with composite or RMGIC from the maxillary central incisors. Fifteen orthodontic patients were selected for the study. For each patient, the teeth were rinsed and dried, and brackets were bonded with composite (Transbond XT) and RMGIC (Vitremer Core Buildup/Restorative). At the conclusion of orthodontic treatment, their brackets were removed. Dental replicas were made of epoxy resin in initial conditions (before bonded) and after polishing with an aluminum oxide disc system. Adhesive remnant index (ARI) and surface roughness was measured on the dental replicas and data were evaluated statistically by Mann-Whitney and paired t-test, respectively. No bracket debonding occurred during patients’ treatment periods. It was verified that the ARI values of the two maxillary central incisors were similar (p = 0.665). For both bonding materials, the ARI value of 3 was predominant. After polishing, surface roughness was similar in the composite and RMGIC groups (0.245 μm and 0.248 μm, respectively; p = 0.07). In both groups, enamel surface roughness values were significantly lower after polishing compared with the initial condition (p < 0.001). RMGIC promoted efficiency in cementing brackets without fail during treatment; the choice of composite or RMGIC materials was not a factor that influenced the roughness of the enamel surface, however, polishing led to smoother surfaces than those found at the beginning of the treatment.

Randomized Clinical Trial of Adhesive Restorations in Non Carious Cervical Lesions

2016 ◽  
Vol 695 ◽  
pp. 3-11 ◽  
Author(s):  
Sanda Mihaela Popescu ◽  
Mihaela Jana Ţuculină ◽  
Horia Octavian Manolea ◽  
Veronica Mercuţ ◽  
Monica Scrieciu
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Clinical Performance ◽  
Resin Composite ◽  
Survival Rates ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Cervical Lesions ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer

AIM: To evaluate the clinical performance of adhesive restorations of resin-modified glass-ionomer cements (RMGIC) compared with of resin composite (RC), and RMGIC liner base laminated with a resin composite in non carious cervical lesions (NCCL).METHODS: The randomized clinical trial included 45 patients (25-65 year-old), with at least two similar sized NCCL on premolars. After sample size calculation, 220 restorations were placed, according to one of the following groups: (G1) Resin-modified glass-ionomer cement (Vitremer); (G2) a resin composite and an adhesive layer (Versaflo); (G3) RMGIC liner base laminated with a resin composite (Vitremer and Versaflo). The restorations were clinically followed every 6 months for up to 24 months using the USPHS modified criteria for clinical evaluation. Survival estimates for restoration longevity were evaluated using the Kaplan-Meier method. Log-rank test (P< 0.05) was used to compare the differences in the success rate according to the type of the restorative material.RESULTS: At the end of 24 months, 172 restorations were evaluated in 37 patients, with a recall rate of 82.22%. The type of restorative material used did not influence the longevity of the restorations. The survival rates for the follow-up were similar regarding the number of restored surfaces and the tooth (upper or lower premolar). Estimated survival rates of the restorations were 100%, 100%, 98,25% and 90,69% at 6, 12, 18 and 24 months of clinical evaluations, respectively. A statistically significant difference was observed between RMGIC and RC or RMGIC laminated with RC for color match, but no other significant difference was observed among the three types of restorations.CONCLUSIONS: The survival rates were similar for the three types of restorations in NCCL. Different types of materials demonstrated acceptable clinical performance in non-carious cervical lesions.

scholarly journals Sealing ability of materials used as protective cervical barrier in internal tooth bleaching

RSBO ◽  
2017 ◽  
Vol 14 (2) ◽  
pp. 67-73
Author(s):  
Juan Fernando Ordoñéz-Aguilera ◽  
Rafael Massunari Maenosono ◽  
Denise Ferracioli Oda ◽  
Heitor Marques Honório ◽  
Rafael Francisco Lia Mondelli ◽  
...  
Keyword(s):  
Resin Composite ◽  
Glass Ionomer Cement ◽  
Rank Correlation ◽  
In Vitro Study ◽  
Tooth Bleaching ◽  
Glass Ionomer ◽  
Sealing Ability ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

The use of a protective cervical barrier (PCB) is very well established to perform a safe internal bleaching; however, there is still no consensus on which material has the best sealing ability. Objective: This in vitro study aimed to evaluate the apical and linear sealing of different PCB materials placed during internal bleaching. Material and methods: This study had two study factors: PCB positioning, divided at two levels (cement-enamel junction [CEJ] and 1mm above the cement enamel junction [CEJ+1]); and PCB material, divided at eight levels (resin composite [RC], glass ionomer cement [GIC], resin-modified glass ionomer cement liner [LRGIC], restorative resin-modified glass ionomer cement [RRGIC], zinc phosphate cement [ZPC], eugenol-free zinc oxide cement [ZOC], provisional filling resin [PFR] and gutta-percha as control [GUT]). Response variables were apical and linear sealing obtained through dye penetration and analyzed with a digital microscope. Data were subjected to two-way analysis of variance followed by Tukey test (p<0.05). Results: The main factor for both apical and linear sealing was the type of material (p<0.01) regardless of their position. RC and ZPC presented the worst sealing values (p<0.05). The Spearman rank correlation coefficient revealed a positive correlation between the apical and linear leakage. Conclusion: The results suggest that RC and ZPC must be avoided as a PCB during internal bleaching procedures.

scholarly journals Effect Fresh Milk on Surface Roughness of Resin Modified Glass Ionomer Cement

2019 ◽  
Vol 22 (1) ◽  
pp. 12-14
Author(s):  
Astrid Yudhit ◽  
Kholidina Imanda Harahap ◽  
Yuli Ratna Dewi
Keyword(s):  
Surface Roughness ◽  
Primary Teeth ◽  
Glass Ionomer Cement ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Fresh Milk ◽  
Resin Modified Glass Ionomer ◽  
Before And After ◽  
One Way Anova ◽  
Ionomer Cement

Resin modified glass ionomer cement as restorative material used in dentistry especially in primary teeth. Fresh milk is often consumed by children as daily drink and it contains lactic acid. The aim of this study was to evaluate surface roughness of resin modified glass ionomer cement after immersed in fresh milk for 2, 4, and 6 hours. Samples were disc shape resin modified glass ionomer cement with size 5 mm in diameter and 2 mm in thickness. Totally 24 samples were divided into 3 groups (n=8), group immersed for 2 hours, group immersed for 4 hours, and group immersed for 6 hours. Fresh milk was pure cow’s milk that harvest in the morning by the farmer. Surface roughness measurements was done before and after immersed using a profilometer (Surfcorder SE-300, Laboratory Ltd, Japan). Results showed surface roughness change were 0.0217 ± 0.005 μm for groups A, 0.0366 ± 0.006 μm for groups B, and 0.0555 ± 0.004μm for groups of 6 hours. One Way Anova test showed significant differences between groups (p <0.05). It can be concluded that there was significant increased on surface roughness of modified resin ionomer cement after immersed in fresh milk for 2, 4 and 6 hours.    

scholarly journals Evaluation of Solubility of Luting Cements in Different Solutions

2020 ◽  
Vol 49 (1) ◽  
pp. 57
Author(s):  
Alma Gavranović-Glamoč ◽  
Muhamed Ajanović ◽  
Lejla Kazazić ◽  
Sanela Strujić-Porović ◽  
Selma Zukić ◽  
...  
Keyword(s):  
Ph Value ◽  
Artificial Saliva ◽  
Glass Ionomer Cement ◽  
Three Solutions ◽  
Resin Cements ◽  
Luting Cements ◽  
Significant Difference ◽  
Before And After ◽  
Post Hoc ◽  
Nonparametric Statistical

<p><strong>Objective. </strong>To evaluate and compare the solubility of three luting cements in three different solutions: distilled water and artificial saliva with different pH values (7.4 and 3.0).</p><p><strong>Materials and Methods</strong>. Resin-modified glass-ionomer cement (GC Fuji Plus) and two resin cements (Multilink Automix and Variolink II) were used. A total of 45 specimens, 15 specimens (15x1 mm) for each cement, were prepared according to ISO standard 4049:2009. The solubility of the cements was calculated by weighing the specimens before and after immersion and desiccation. Values of solubility in water (Wsl) in microgram/mm3 for each of the five specimens were calculated using the following formula (ISO 4049:2009): Wsl=(m1-m3)∕V. The Mann-Whitney U nonparametric statistical method and Post hoc sample comparisons were applied.</p><p><strong>Results. </strong>GC Fuji Plus showed statistically significant higher solubility in comparison with Variolink II and Multilink Automix in all three solutions. In acidic artificial saliva (pH 3.0) Multilink Automix showed significantly higher values of solubility compared to Variolink II (P&lt;0.016). By studying the effect of pH value on the solubility of GC Fuji Plus cement, significantly higher values of solubility in pH 3.0 artificial saliva were confirmed (P&lt;0.009). The influence of the surrounding pH value on the solubility of the resin cements Multilink Automix and Variolink II was researched. No statistically significant difference was found.</p><p><strong>Conclusion. </strong>Solubility values were mainly influenced by the proportion of hydrophilic matrix, the type and composition of filler, and the pH value of the solutions.</p>

Sealing ability of materials used as protective cervical barrier in internal tooth bleaching

RSBO ◽  
2017 ◽  
Vol 1 (2) ◽  
pp. 67
Author(s):  
Juan Fernando Ordoñéz-Aguilera ◽  
Rafael Massunari Maenosono ◽  
Denise Ferracioli Oda ◽  
Heitor Marques Honório ◽  
Rafael Francisco Lia Mondelli ◽  
...  
Keyword(s):  
Resin Composite ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Tooth Bleaching ◽  
Glass Ionomer ◽  
Sealing Ability ◽  
Resin Modified Glass Ionomer ◽  
Materials Used ◽  
Ionomer Cement

The use of a protective cervical barrier (PCB) is very well established to perform a safe internal bleaching; however, there is still no consensus on which material has the best sealing ability. Objective: This in vitro study aimed to evaluate the apical and linear sealing of different PCB materials placed during internalbleaching. Material and methods: This study had two study factors: PCB positioning, divided at two levels (cement-enamel junction [CEJ] and 1mm above the cement enamel junction [CEJ+1]); and PCB material, divided at eight levels (resin composite [RC], glass ionomer cement [GIC], resin-modified glass ionomer cement liner [LRGIC], restorative resin-modified glass ionomer cement [RRGIC], zinc phosphate cement [ZPC], eugenol-free zinc oxide cement [ZOC],provisional filling resin [PFR] and gutta-percha as control [GUT]). Response variables were apical and linear sealing obtained through dye penetration and analyzed with a digital microscope. Data were subjected to two-way analysis of variance followed by Tukey test (p<0.05). Results: The main factor for both apical and linear sealing was the type of material (p<0.01), regardless of their position. RC and ZPC presented the worst sealing values (p<0.05). The Spearmanrank correlation coefficient revealed a positive correlation between the apical and linear leakage. Conclusion: The results suggest that RC and ZPC must be avoided as a PCB during internal bleaching procedures.

scholarly journals Bond Strengths of Silorane- and Methacrylate-Based Composites to Various Underlying Materials

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Sezin Ozer ◽  
Emine Sen Tunc ◽  
Nihan Gonulol
Keyword(s):  
Shear Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Significance Level ◽  
Low Elastic Modulus ◽  
Resin Modified Glass Ionomer ◽  
Bond Strengths ◽  
Post Hoc ◽  
Ionomer Cement

Objective. To evaluate shear bond strength (SBS) values of a methacrylate (FZ 250) and a silorane-based (FS) resin composite to various underlying materials.Materials and Methods. A total of 80 samples were prepared with four different underlying materials; a flowable (FLC) and a bulk-fill flowable composite (BFC), and a conventional (CGIC) and resin modified glass-ionomer cement (RMGIC). These underlying materials were laminated plus to methacrylate or silorane-based resin composites(n=10). To evaluate the specimens SBS values were evaluated with a universal testing machine (cross-head speed; 1.0 mm/min). Statistical comparisons were carried out using two-way ANOVA and Tukey’s post hoc test with a significance level ofP<0.05.Results. SBS values for FZ250 were significantly higher than for FS for all of the underlying materials tested(P<0.05). SBS values of FZ250 to BFC were significantly higher than to all other materials(P<0.05), whereas SBS values of FS did not vary significantly according to underlying material(P>0.05).Conclusion. The use of FS in conjunction with any of the tested materials showed lower SBS than the FZ 250. Also, new low elastic modulus liner BFC presented slightly good interfacial adhesion so, the usage of BFC as an underlying material may be preferable for FZ 250.

scholarly journals The effect of one-step and multi-step polishing systems on the surface roughness and microhardness of novel resin composites

2012 ◽  
Vol 06 (02) ◽  
pp. 198-205 ◽  
Author(s):  
Ugur Erdemir ◽  
Hande Sar Sancakli ◽  
Esra Yildiz
Keyword(s):  
Surface Roughness ◽  
Resin Composite ◽  
In Vitro Study ◽  
Resin Composites ◽  
Significance Level ◽  
Significant Difference ◽  
One Step ◽  
Wet Ground ◽  
Post Hoc

ABSTRACTObjectives: The objective of this in vitro study was to evaluate the surface roughness and microhardness of three novel resin composites containing nanoparticles after polishing with one-step and conventional multi-step polishing systems.Methods: A total of 126 specimens (10 X 2 mm) were prepared in a metal mold using three nanocomposites (Filtek Supreme XT, Ceram-X, and Grandio), 21 specimens of each resin composite for both tests (n=63 for each test). Following light curing, seven specimens from each group received no polishing treatment and served as controls for both tests. The specimens were randomly polished using PoGo and Sof-Lex systems for 30 seconds after being wet-ground with 1200-grit silicon carbide paper. The mean surface roughness of each polished specimen was determined with a profilometer. The microhardness was determined using a Vickers hardness measuring instrument with a 200-g load and 15 seconds dwell time. The data were analyzed using the Kruskal-Wallis test and the post hoc Dunn's multiple comparison tests at a significance level of .05.Results: Among all materials, the smoothest surfaces were obtained under a matrix strip (control) (P<.05). There were no statistically significant differences among polishing systems in the resin composites for surface roughness (P>.05). The lowest hardness values for the three resin composites were obtained with a matrix strip, and there was a statistically significant difference compared with other polishing systems (P<.05) whereas no statistically significant differences were observed between the polishing systems (P<.05).Conclusion: The current one-step polishing system appears to be as effective as multi-step systems and may be preferable for polishing resin composite restorations. (Eur J Dent 2012;6:198-205)

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