Radiopacity of 28 Composite Resins for Teeth Restorations

ABSTRACT Aim Radiopacity is a fundamental requisite to check marginal adaptation of restorations. Our objective was to assess the radiopacity of 28 brands of light-cured composite resins and compare their radiopacity with that of enamel, dentin, and aluminum of equivalent thickness. Materials and methods Composite resin disks (0.2, 0.5, and 1 mm) were radiographed by the digital method, together with an aluminum penetrometer and a human tooth equivalent tooth section. The degree of radiopacity of each image was quantified using digital image processing. Wilcoxon nonparametric test was used for comparison of the mean thickness of each material. Results All of the materials tested had an equal or greater radiopacity than that of aluminum of equivalent thickness. Similar results for enamel were found with the exception of Durafill, which was less radiopaque than enamel (p < 0.05). All the specimens were more radiopaque than dentin, except for P90 (which was equally radiopaque) and Durafill (which was less radiopaque). The thickness of the specimens may influence the similarity to the enamel's radiopacity. All of the composite resins comply with specification #27 of the American Dental Association. The radiopacity of Amelogen Plus, Aph, Brilhiante, Charisma, Concept Advanced, Evolux X, Exthet X, Inten S, Llis, Master Fill, Natural Look, Opallis, P60, Tetric, Tph, Z100, and Z250 was significantly higher than that of enamel (p < 0.05). Conclusion With these composites, it is possible to observe the boundaries between restoration and tooth structure, thus allowing clinicians to establish the presence of microleakage or restoration gap. Clinical significance Suitable radiopacity is an essential requisite for good-quality esthetic restorative materials. We demonstrate that only some composites have the sufficient radiopacity to observe the boundaries between restoration and tooth structure, which is the main cause of restoration failure. How to cite this article Raitz R, Moruzzi PD, Vieira G, Fenyo- Pereira M. Radiopacity of 28 Composite Resins for Teeth Restorations. J Contemp Dent Pract 2016;17(2):136-142.

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Radiopacity of restorative materials using digital images

Journal of Applied Oral Science ◽

10.1590/s1678-77572006000200015 ◽

2006 ◽

Vol 14 (2) ◽

pp. 147-152 ◽

Cited By ~ 24

Author(s):

Leda Maria Pescinini Salzedas ◽

Mário Jefferson Quirino Louzada ◽

Antonio Braz de Oliveira Filho

Keyword(s):

Restorative Material ◽

Radiographic Image ◽

Equivalent Thickness ◽

Tooth Structure ◽

Suitable Material ◽

Dental Tissues ◽

Permanent Molar ◽

Restorative Materials ◽

Phosphor Plate ◽

The Mean

The radiopacity of esthetic restorative materials has been established as an important requirement, improving the radiographic diagnosis. The aim of this study was to evaluate the radiopacity of six restorative materials using a direct digital image system, comparing them to the dental tissues (enamel-dentin), expressed as equivalent thickness of aluminum (millimeters of aluminum). Five specimens of each material were made. Three 2-mm thick longitudinal sections were cut from an intact extracted permanent molar tooth (including enamel and dentin). An aluminum step wedge with 9 steps was used. The samples of different materials were placed on a phosphor plate together with a tooth section, aluminum step wedge and metal code letter, and were exposed using a dental x-ray unit. Five measurements of radiographic density were obtained from each image of each item assessed (restorative material, enamel, dentin, each step of the aluminum step wedge) and the mean of these values was calculated. Radiopacity values were subsequently calculated as equivalents of aluminum thickness. Analysis of variance (ANOVA) indicated significant differences in radiopacity values among the materials (P<0.0001). The radiopacity values of the restorative materials evaluated were, in decreasing order: TPH, F2000, Synergy, Prisma Flow, Degufill, Luxat. Only Luxat had significantly lower radiopacity values than dentin. One material (Degufill) had similar radiopacity values to enamel and four (TPH, F2000, Synergy and Prisma Flow) had significantly higher radiopacity values than enamel. In conclusion, to assess the adequacy of posterior composite restorations it is important that the restorative material to be used has enough radiopacity, in order to be easily distinguished from the tooth structure in the radiographic image. Knowledge on the radiopacity of different materials helps professionals to select the most suitable material, along with other properties such as biocompatibility, adhesion and esthetic.

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THE COMPARISON OF RESIN-BASED COMPOSITES PHYSICAL PROPERTIES BETWEEN BULK-FILL TECHNIQUE AND INCREMENTAL TECHNIQUE

Dentino : Jurnal Kedokteran Gigi ◽

10.20527/dentino.v6i1.10646 ◽

2021 ◽

Vol 6 (1) ◽

pp. 85

Author(s):

Rahmi Khairani Aulia

Keyword(s):

Physical Properties ◽

Composite Resin ◽

Color Stability ◽

Composite Resins ◽

Shrinkage Stress ◽

Restorative Material ◽

Polymerization Shrinkage ◽

Advantages And Disadvantages ◽

Restoration Technique ◽

Restoration Failure

ABSTRACT:Composite resins are currently the most popular restorative material in dentistry. This is due to good aesthetics and maximum conservation ability. Behind these advantages, there are disbenefits of composite resin materials, such as polymerization shrinkage, which can lead to restoration failure. Various attempts have been investigated to reduce the shrinkage incidence of composite resins, one of which is the technique of placing the restorative material into the cavity. The restoration filling technique is recognized as a significant factor in shrinkage stress. By using a special filling technique, the polymerization shrinkage damage stress can be reduced. There are several techniques in performing composite resin fillings, including bulk and incremental techniques. These techniques have their respective advantages and disadvantages. The aim of this literature review was to compare the physical properties of composite resin restorations with bulk filling and incremental techniques. Physical properties that being studied include polymerization shrinkage, stress shrinkage, degree of conversion, bonding strength, water resorption, color stability, and temperature increase. Comparing the two techniques, composite resin with incremental filling technique has superior physical properties compared to bulk technique. From the comparison of the two techniques, the composite resin with incremental filling technique has superior physical properties compared to the bulk technique, especially in higher conversion which causes lower shrinkage stress. This situation makes the incremental technique provide better bond strength, water resorption, color stability, and lower temperature rise.Keywords: Bulk, Composite Resin, Incremental, Physical Properties, Restoration, Restoration Technique

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Perceptibility and Acceptability of Surface Gloss Variation Under Different Illuminants

Operative Dentistry ◽

10.2341/20-011-c ◽

2021 ◽

Author(s):

RS Rocha ◽

VG de Carvalho ◽

MNC Galvão ◽

MY de Souza ◽

TMF Caneppele ◽

...

Keyword(s):

Composite Resin ◽

Probit Model ◽

Composite Resins ◽

Human Tooth ◽

Fluorescent Light ◽

Probit Regression ◽

Natural Teeth ◽

Acceptability Judgments ◽

Surface Gloss ◽

Limiting Values

Clinical Relevance The influence of different illuminants on the perception and acceptance of surface gloss variation in composite resins remains unclear but is important if restorations are to mimic natural teeth. SUMMARY Objective: The purpose of this study was to evaluate the influence of different illuminants on the perceptibility and acceptability of surface gloss variations and to determine limiting values. Methods: Eight composite resin specimens and one human tooth specimen were polished to obtain composite resin specimens with different gloss units (GU) of 10, 20, 30, 40, 50, 60, 70, and 80 and a human tooth specimen of 80 GU. Sixty observers compared the surface gloss of the specimens in a light booth. For perceptibility testing, the specimens were randomly positioned two at a time. The acceptability of the gloss variation was determined by comparing the composite resin specimens with the tooth specimen. The observers answered specific questions to determine the level and perceptibility and acceptability limits of gloss variations. All analysis was done with two illuminants (D65 and fluorescent light) used randomly. Data were submitted to a nonlinear probit model and nonlinear probit regression estimation (α=0.05). Results: Significant differences in illuminants were observed for perceptibility (p<0.001) and acceptability (p=0.045). The perceptibility limit for D65 was 7.0 GU and 6.8 GU for fluorescent illuminant. The acceptability limit for D65 was 34.2 GU and 37.1 GU for fluorescent illuminant. Conclusions: More accurate perceptibility and acceptability judgments of the surface gloss of composite resin were made when the specimens were illuminated with D65 light.

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Comparison of silorane and methacrylate-based composite resins on the curing light transmission

Brazilian Dental Journal ◽

10.1590/s0103-64402010000600010 ◽

2010 ◽

Vol 21 (6) ◽

pp. 538-542 ◽

Cited By ~ 19

Author(s):

Ricardo Danil Guiraldo ◽

Simonides Consani ◽

Rafael Leonardo Xediek Consani ◽

Sandrine Bittencourt Berger ◽

Wilson Batista Mendes ◽

...

Keyword(s):

Composite Resin ◽

Light Transmission ◽

Knoop Hardness ◽

Composite Resins ◽

Power Meter ◽

Light Curing ◽

Curing Light ◽

The Mean ◽

Spectral Distributions ◽

The Difference

The aim of this study was to investigate the influence of different composite resins - Filtek P90 (silorane-based composite) and Heliomolar (methacrylate-based composite) - on light transmission and decrease in Knoop hardness between the bottom and top of cured specimens. The irradiance of a light-curing unit (LCU) was measured with a power meter (Ophir Optronics; 900 mw/cm2) and spectral distributions were obtained using a spectrometer (USB 2000). Twenty standardized cylindrical specimens (2 mm thick x 7 mm diameter) of each composite resin were obtained by curing using the LCU for 40 s. Light energy transmission through the composite was calculated (n=10). The Knoop hardness number for each surface was recorded as the mean of 3 indentations. The difference in Knoop hardness between the top and bottom (DKH) of the same specimen was calculated (n=10). The irradiance of light that passed through Filtek P90 (272 mW/cm2) was not significantly greater than that the passed through Heliomolar (271 mW/cm2). The DKH of Filtek P90 (25%) was significantly higher than that of Heliomolar (12%). There was a greater degree of subsurface polymerization of the methacrylate-based composite compared to the silorane-based composite.

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Radiopacity of Methacrylate and Silorane Composite Resins Using a Digital Radiographic System

The Scientific World JOURNAL ◽

10.1155/2016/6389347 ◽

2016 ◽

Vol 2016 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Leily Macedo Firoozmand ◽

Mariana Gonçalves Cordeiro ◽

Marcos André dos Santos Da Silva ◽

Rudys Rodolfo De Jesus Tavarez ◽

Etevaldo Matos Maia Filho

Keyword(s):

Image Processing ◽

Digital Image Processing ◽

Digital Image ◽

Equivalent Width ◽

Composite Resins ◽

Digital Method ◽

Human Tooth ◽

Resin Composites ◽

Mean Values ◽

The Mean

The aim of this study was to evaluate the radiopacity of silorane and methacrylate resin composites, comparing them to the enamel, dentin, and aluminum penetrometer using a digital image. From six resin composites (Filtek™P90, Filtek Z350, Filtek Z350 XT flow, Tetric Ceram, TPH Spectrum, and SureFil SDR flow) cylindrical disks (5 × 1 mm) were made and radiographed by a digital method, together with a 15-step aluminum step-wedge and a 1 mm slice of human tooth. The degree of radiopacity of each image was quantified using digital image processing. The mean values of the shades of gray of the tested materials were measured and the equivalent width of aluminum was calculated for each resin. The results of our work yielded the following radiopacity values, given here in descending order: Tetric Ceram > TPH > SDR > Z350 > Z350 flow > P90 > enamel > dentin. The radiopacity of the materials was different both for the enamel and for the dentin, except for resin P90, which was no different than enamel. In conclusion, silorane-based resin exhibited a radiopacity higher than dentin and closest to the enamel; a large portion of the methacrylate-based flow and conventional resins demonstrated greater radiopacity in comparison to dentin and enamel.

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Radiopacity of calcium hydroxide cement compared with human tooth structure

Journal of Applied Oral Science ◽

10.1590/s1678-77572004000400007 ◽

2004 ◽

Vol 12 (4) ◽

pp. 290-293 ◽

Cited By ~ 7

Author(s):

Karina Lopes Devito ◽

Ana Isabel Ortega ◽

Francisco Haiter-Neto

Keyword(s):

Calcium Hydroxide ◽

Analysis Of Variance ◽

The Other ◽

Human Tooth ◽

Equivalent Thickness ◽

Secondary Caries ◽

Tooth Structure ◽

Base Materials ◽

Significant Difference ◽

Lead Foil

AIMS: All materials added to teeth should present an adequate radiopacity to allow the detection of secondary caries. Usually, in extensive cavities, base materials like calcium hydroxide cement are used for the purpose of protecting the pulp. In an attempt to improve the efficiency of radiographic detection of this material, this study aimed to determine the radiopacity of three calcium hydroxide cements and to compare the radiopacity of these materials with dentin and enamel. METHODS: Radiographs were taken of 1-mm thick specimens of three calcium hydroxide cements: Hydro-C, Dycal and Life, an aluminium stepwedge, a lead foil, and one 1-mm thick human tooth slice. Densitometric measurements were obtained after radiographic processing. The radiopacity values of the calcium hydroxide cements, dentin and enamel were expressed in terms of the equivalent thickness of aluminium. RESULTS: The analysis of variance indicated statistically significant difference only for Life, which presented the lowest radiopacity when compared to the other cements. However, all cements and enamel possessed a radiopacity equivalent to 2mm Al, while dentin presented a radiopacity equivalent to 1mm Al. CONCLUSION: All tested cements presented a similar radiopacity to that of enamel and they meet the ISO 4049 specifications.

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Effect of Dental Finishing Instruments on the Surface Roughness of Composite Resins as Elucidated by Atomic Force Microscopy

Microscopy and Microanalysis ◽

10.1017/s1431927608080768 ◽

2008 ◽

Vol 14 (5) ◽

pp. 380-386 ◽

Cited By ~ 18

Author(s):

Ana Carolina Botta ◽

Sillas Duarte ◽

Pedro Iris Paulin Filho ◽

Simoni Maria Gheno

Keyword(s):

Surface Roughness ◽

Composite Resin ◽

Composite Resins ◽

Contact Mode ◽

Force Microscopy ◽

Diamond Bur ◽

Atomic Force ◽

The Mean ◽

Student’S T ◽

Student’S T Test

AbstractRoughness increases significantly after finishing procedures. The aim of this study was to assess by the atomic force microscope (AFM) the effect of finishing instruments on the surface roughness of composite resins. A nanofiller composite resin (Filtek Supreme, 3M–F) and a microhybrid composite resin (Point 4, Kerr–P) were selected. The finishing procedures were done with a 30-blade carbide bur (C) and a 30-μm finishing diamond bur (D). Standardized specimens were produced and divided into six experimental groups (n= 4) according to (1) composite resin, (2) absence of finishing (Mylar matrix–M), and (3) finishing instrument (FM, PM, FC, FD, PC, PD). The mean surface roughness was evaluated by AFM in the contact mode. FM and PM groups were assessed statistically by the Student's T test, and FC, FD, PC, PD groups were submitted to variance analysis (ANOVA), both at 5% significance. The mean surface roughness values, in nanometers, were FM, 23.63 (b); FC, 283.88 (c); FD, 510.55 (d); PM, 12.52 (a); PC, 343.98 (c); PD, 531.64 (d). Microhybrid composite displayed less roughness than nanofiller composite in the absence of finishing procedures. The 30-blade carbide bur produced less roughness compared to the extra fine diamond bur.

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Comparison of the Ability of Two Brands of CBCT with That of SEM to Detect the Marginal Leakage of Class V Composite Resin Restorations

The Scientific World JOURNAL ◽

10.1155/2021/6688554 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Mitra Karbasi Kheir ◽

Leili Khayam

Keyword(s):

Composite Resin ◽

Nitrate Solution ◽

Silver Nitrate Solution ◽

Composite Resins ◽

Rank Test ◽

Sem Images ◽

Class V ◽

Significant Difference ◽

The Mean ◽

Composite Resin Restorations

Objectives. This study was carried out to compare the ability of two common brands of cone-beam computed tomography (CBCT), including New Tom and Planmeca, to detect the marginal leakage of class V composite resins. The ability of each of the two brands of CBCT to detect the marginal leakage of class V composite resins was also compared with that of scanning electron microscopy (SEM). Methods. Class V cavities were prepared on the buccal surface of sixteen extracted caries-free human premolars. Cavities were conditioned and filled with composite resin. The teeth were immersed in 50% weight/weight aqueous silver nitrate solution for 24 hours. They were then taken out and rinsed with distilled water. Next, they were put in a developing solution. They were first viewed with New Tom and Planmeca CBCT units and were then sectioned and evaluated by an SEM. Results. The results of the Wilcoxon signed-rank test showed no significant difference between the mean marginal leakage scores of New Tom and Planmeca CBCT images ( p value = 0.157) and between those of New Tom CBCT and SEM images ( p value = 0.098). However, there was a significant difference between the mean marginal leakage scores of Planmeca CBCT and SEM images ( p value = 0.023). Conclusion. There were no significant differences between New Tom and Planmeca CBCT units in the detection of marginal leakage of class V composite resins. However, when these CBCT units were compared with the SEM, the New Tom CBCT unit could detect the marginal leakage better than Planmeca.

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Effects of Bleaching Agents on the Microhardness and Surface Roughness of Bulk Fill Composites

World Journal of Dentistry ◽

10.5005/jp-journals-10015-1437 ◽

2017 ◽

Vol 8 (3) ◽

pp. 196-201 ◽

Cited By ~ 1

Author(s):

K Pradeep

Keyword(s):

Surface Roughness ◽

Physical Properties ◽

Composite Resin ◽

Artificial Saliva ◽

Composite Resins ◽

Control Group ◽

Hardness Tester ◽

Crucial Effect ◽

Restorative Materials ◽

The Mean

ABSTRACT Aim The aim was to compare the effect of 10 and 20% carbamide peroxide (CP) on microhardness (MHN) and surface roughness of two commercially available bulk fill composites (X-tra fill Bulk Fill and Tetric EvoCeram Bulk Fill). Materials and methods A total of 50 specimens with both type composites were prepared using brass molds of inner diameter 10 mm and a height of 4 mm. Each type of composite was further divided into three groups, control group stored in artificial saliva for 14 days, other groups bleached with 10 and 20% CP respectively, for 14 days. Microhardness of the composite resin was tested with a Vickers hardness tester, whereas surface roughness was tested with profilometer. Results All the analysis was performed using Statistical Package for the Social Sciences version 18. The value of p < 0.05 was considered statistically significant. Both 10 and 20% CP significantly reduced MHN of experimental composite resins. However, the mean surface roughness was significantly higher in X-tra fill Bulk Fill than Tetric EvoCeram Bulk Fill at 20% CP concentration. The mean MHN of Tetric EvoCeram was reduced when compared with X-tra fill at 20% CP. Conclusion There was a significant reduction in the MHN of restorative materials observed after exposure to CP under a clinically simulated bleaching regimen. However, increase in surface roughness was seen only at 20% CP. Clinical significance The physical properties, such as MHN and surface roughness have a crucial effect on the longevity of restorations and, moreover, on the esthetic demands of patients, but they may be compromised by bleaching treatments. The aim of this research paper was to assess the reaction of home bleaching agents on the physical properties of two Bulk Fill composite resin restorative materials. How to cite this article Francis G, Pradeep K, Ginjupalli K, Saraswathi V. Effects of Bleaching Agents on the Microhardness and Surface Roughness of Bulk Fill Composites. World J Dent 2017;8(3):196-201.

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