scholarly journals Effect of Restorative System and Thermal Cycling on the Tooth-Restoration Interface – OCT Evaluation

2016 ◽  
Vol 41 (2) ◽  
pp. 162-170 ◽  
Author(s):  
CS Sampaio ◽  
RV Rodrigues ◽  
EJ Souza-Junior ◽  
AZ Freitas ◽  
GMB Ambrosano ◽  
...  
Keyword(s):  
Thermal Cycling ◽  
Resin Composite ◽  
Adhesive System ◽  
Repeated Measurements ◽  
Cervical Lesion ◽  
Resin Composites ◽  
Marginal Integrity ◽  
Group 5 ◽  
Group 2 ◽  
Noncarious Cervical Lesion

SUMMARY The present study evaluated the tooth/noncarious cervical lesion restoration interface when using different adhesive systems and resin composites, submitted to thermal cycling (TC), using optical coherence tomography (OCT). Noncarious cervical lesion (NCCL) preparations (0.7 mm depth × 2 mm diameter) were performed on 60 human third molars and randomly divided into six groups, according to the adhesive system and resin composite used: group 1 = Adper Single Bond 2 (SB2) + Aelite LS Posterior (AP); group 2 = SB2 + Venus Diamond (VD); group = SB2 + Filtek Z250XT (Z250); group 4 = Clearfil SE Bond (CSE) + AP; group 5 = CSE + VD; group 6 = CSE + Z250. Selective enamel etching was performed for 30 seconds on groups 4, 5, and 6, while groups 1, 2, and 3 were etched for 30 seconds in enamel and 15 seconds in dentin. All groups were evaluated using OCT before and after TC (n=10). Images were analyzed using Image J software; enamel and dentin margins were separately evaluated. Data from OCT were submitted to PROC MIXED for repeated measurements and Tukey Kramer test (α = 0.05). No marginal gaps were observed in etched enamel, either before or after TC, for all adhesive and resin composite systems. A significant interaction was found between adhesive system and TC for the dentin groups; after TC, restorations with CSE showed smaller gaps at the dentin/restoration interface compared with SB2 for all resin composites. Increased gap percentages were noticed after TC compared with the gaps before TC for all groups. In conclusion, TC affected marginal integrity only in dentin margins, whereas etched enamel margins remained stable even after TC. Dentin margins restored with CSE adhesive system showed better marginal adaptation than those restored with SB2. Resin composites did not influence marginal integrity of NCCL restorations.

scholarly journals Push-Out Bond Strength of Restorations with Bulk-Fill, Flow, and Conventional Resin Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Rodrigo Vieira Caixeta ◽  
Ricardo Danil Guiraldo ◽  
Edmilson Nobumitu Kaneshima ◽  
Aline Silvestre Barbosa ◽  
Cassiana Pedrotti Picolotto ◽  
...  
Keyword(s):  
Bond Strength ◽  
Light Emitting Diode ◽  
Resin Composite ◽  
Testing Machine ◽  
Adhesive System ◽  
Optical Microscope ◽  
Resin Composites ◽  
Conical Cavity ◽  
Significance Level ◽  
Push Out

The aim of this study was to evaluate the bond strengths of composite restorations made with different filler amounts and resin composites that were photoactivated using a light-emitting diode (LED). Thirty bovine incisors were selected, and a conical cavity was prepared in the facial surface of each tooth. All preparations were etched with Scotchbond Etching Gel, the Adper Scotchbond Multipurpose Plus adhesive system was applied followed by photoactivation, and the cavities were filled with a single increment of Filtek Z350 XT, Filtek Z350 XT Flow, or bulk-fill X-tra fil resin composite (n= 10) followed by photoactivation. A push-out test to determine bond strength was conducted using a universal testing machine. Data (MPa) were submitted to Student’st-test at a 5% significance level. After the test, the fractured specimens were examined using an optical microscope under magnification (10x). Although all three composites demonstrated a high prevalence of adhesive failures, the bond strength values of the different resin composites photoactivated by LED showed that the X-tra fil resin composite had a lower bond strength than the Filtek Z350 XT and Filtek Z350 XT Flow resin composites.

Clinical Evaluation of a Silorane- and a Methacrylate-Based Resin Composite in Class II Restorations: 24-Month Results

2017 ◽  
Vol 42 (4) ◽  
pp. E102-E110 ◽  
Author(s):  
E Karaman ◽  
AR Yazici ◽  
G Ozgunaltay ◽  
I Ustunkol ◽  
A Berber
Keyword(s):  
Clinical Performance ◽  
Resin Composite ◽  
Adhesive System ◽  
Class Ii ◽  
Resin Composites ◽  
Chi Square ◽  
Significant Difference ◽  
Restorative Materials ◽  
Chi Square Test ◽  
Self Etch

SUMMARY Objective: To compare the 24-month clinical performance of two different resin composites in class II slot restorations. Methods and Materials: Thirty-seven patients having at least two approximal carious lesions were enrolled in the study. A total of 116 teeth (58 pairs) were restored with either a silorane-based composite (Filtek Silorane) and its self-etch adhesive (Silorane Adhesive System, 3M ESPE) or a methacrylate-based packable resin composite (X-tra Fil) and its self-etch adhesive (Futurabond NR, VOCO GmbH) according to the toss of a coin. The restorations were evaluated at baseline and at six-, 12-, and 24-month recalls by two calibrated examiners according to the modified US Public Health Service criteria. The comparison of the two restorative materials for each category was performed with the Pearson chi-square test. Within group differences of the materials at different recall times were compared using the Cochran Q and Friedman tests. Bonferroni-adjusted McNemar test was used when significant difference was found (p<0.05). Results: After 24 months, no statistically significant differences were found between the two restorative materials for the criteria evaluated. Conclusions: Both silorane- and methacrylate-based resin composites showed clinically acceptable performance in class II slot restorations after 24 months.

scholarly journals Resin Bonding of Self-Etch Adhesives to Bovine Dentin Bleached from Pulp Chamber

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Akiko Haruyama ◽  
Atsushi Kameyama ◽  
Junji Kato ◽  
Shinji Takemoto ◽  
Yutaka Oda ◽  
...  
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Adhesive System ◽  
Unit Group ◽  
Tooth Bleaching ◽  
Pulp Chamber ◽  
Halogen Light ◽  
Group 2 ◽  
Self Etch ◽  
Group 1

This study evaluated the microtensile bond strength (μTBS) of 1-step self-etch adhesives (1-SEAs) and 2-step self-etch adhesives (2-SEAs) to pulp chamber dentin immediately after bleaching with 2 types of common bleaching techniques. Pulp chamber dentin of bovine teeth was bleached using 30% hydrogen peroxide (H2O2) solution with quartz-tungsten-halogen light-curing unit (Group 1) and 3.5% H2O2-containing titanium dioxide (TiO2) (Pyrenees®) activated with 405-nm violet diode laser for 15 min (Group 2). Unbleached specimens were placed in distilled water for 15 min and used as controls. After treatment, dentin was bonded with resin composite using 1-SEA or 2-SEA and stored in water at 37°C for 24 h. Each specimen was sectioned and trimmed to an hourglass-shape andμTBS was measured. Fractured specimens were examined under a scanning electron microscope to determine fracture modes. All specimens in Group 1 failed before proper bonding tests. In Group 2, theμTBS of 2-SEA was significantly greater (with no failed specimens) than 1-SEA (where 21 out of 36 failed). These results indicate that 2-SEA is a better adhesive system than 1-SEA on bleached dentin. Our results also demonstrated that application of H2O2significantly decreases bond strength of resin to dentin; however, in the case of nonvital tooth bleaching, Pyrenees® is a better alternative to the conventional 30% H2O2bleaching.

scholarly journals Influence of Thermal Cycles Number on Bond Strength of Metallic Brackets to Ceramic

2017 ◽  
Vol 28 (2) ◽  
pp. 206-209 ◽  
Author(s):  
José Eliú Pereira Jurubeba ◽  
Ana Rosa Costa ◽  
Lourenço Correr-Sobrinho ◽  
Carlos Alberto Malanconi Tubel ◽  
Américo Bortolazzo Correr ◽  
...  
Keyword(s):  
Bond Strength ◽  
Thermal Cycling ◽  
Control Group ◽  
Thermal Cycles ◽  
Group 4 ◽  
Group Data ◽  
Group 5 ◽  
Group 2 ◽  
Ceramic Restorations

Abstract The aim of this study was to evaluate the effect of different number of thermal cycles on the shear bond strength (SBS) of metallic orthodontic brackets bonded to feldspathic ceramic by a composite resin. Twenty-five ceramic cylinders were etched with 10% hydrofluoric acid for 60 s and received two layers of silane. Brackets were bonded to the cylinders using Transbond XT and assigned to 5 groups (n=5): Group 1 - Control group (without thermal cycling); Group 2 - 500 thermal cycles; Group 3 - 5,000 thermal cycles; Group 4 - 7,000 thermal cycles and Group 5 - 10,000 thermal cycles. Light-activation was carried out by Radii Plus LED. SBS testing was carried out after 24 h of storage in deionized water and thermal cycling (5/55 oC and 30 s dwell time). Five brackets were bonded to each cylinder, totalizing 25 brackets for each group. Data were submitted to one-way ANOVA and Tukey’s test (α=0.05). The Adhesive Remnant Index (ARI) was evaluated at 8× magnification. The SBS (MPa) of control group (9.3±0.8), 500 (9.0±0.7) and 5,000 (8.4±0.9) thermal cycles were significantly higher than those after 7,000 (6.8±0.6) and 10,000 (4.9±1.0) thermal cycles (p<0.05). The ARI showed a predominance of Scores 0 (adhesive failure) prevailed in all groups, as shown by the ARI, with increased scores 1 and 2 (mixed failures) for control group and 500 thermal cycles. In conclusion, thermal fatigue may compromise the bonding integration between metallic brackets and ceramic restorations. For in vitro testing, use of at least 7,000 cycles is advised to result in significant fatigue on the bonding interface.

scholarly journals Effect of the number of thermocycles on microleakage of resin composite restorations

2003 ◽  
Vol 17 (4) ◽  
pp. 337-341 ◽  
Author(s):  
Flávia Bittencourt Pazinatto ◽  
Bruno Barbosa Campos ◽  
Leonardo César Costa ◽  
Maria Teresa Atta
Keyword(s):  
Resin Composite ◽  
Control Group ◽  
Group 4 ◽  
Thermal Changes ◽  
Group 3 ◽  
Group 5 ◽  
Group 2 ◽  
Number Of Cycles ◽  
Group 1

Thermocycling simulates, in vitro, thermal changes that occur in the oral cavity. The aim of this study was to evaluate the influence of the number of cycles on microleakage. Class V cavities (1.5 mm deep, 3 mm in height and 3 mm in width) were prepared in bovine teeth, restored with a Single Bond/Z250 restorative system (3M/ESPE) and then divided into five groups of ten teeth each: group 1 was not thermocycled (control group), and groups 2, 3, 4 and 5 were thermocycled 500, 1,000, 2,500 and 5,000 times, respectively (5º-55º ± 2ºC, 15 s dwell time). The teeth were immersed in 0.5% basic fuchsin aqueous solution for 24 h, sectioned and the sections with the highest degree of microleakage were selected, scanned and the extent of dye penetration was measured by the ImageTool program. The results submitted to one-way ANOVA showed no significant differences between the groups (p > 0.05). The averages of microleakage values in millimeters were: group 1 (3.92); group 2 (3.13); group 3 (4.48); group 4 (4.33) and group 5 (3.42). Thus, it was concluded that there is no relation between the increase of the number of cycles and the increase in microleakage.

Adhesive Bond Strengths Using Self- and Light-Cured Composites

2009 ◽  
Vol 10 (6) ◽  
pp. 25-32 ◽  
Author(s):  
Ricardo Walter ◽  
Georgia V. Macedo ◽  
Gustavo M. S. Oliveira ◽  
Edward J. Swift
Keyword(s):  
Resin Composite ◽  
Adhesive Bond ◽  
Adhesive System ◽  
Resin Composites ◽  
Microtensile Bond Strength ◽  
Microtensile Testing ◽  
Etch And Rinse ◽  
Occlusal Surfaces ◽  
One Step ◽  
Bond Strengths

Abstract Aim To evaluate the microtensile bond strength (μTBS) of four adhesive systems to dentin, using self- and light-cured resin composites. Methods and Materials Crowns of human molars were separated from the roots, and the occlusal surfaces were ground to obtain flat superficial dentin. Three etch-and-rinse adhesives—All-Bond 2, One-Step Plus, and OptiBond Solo Plus—and one self-etching primer system, Peak SE, were evaluated. Each adhesive group was divided into two subgroups according to the type of resin composite used. A self-cured (Bisfil 2B) or light-cured (Filtek Supreme Plus) resin composite build-up was incrementally inserted to the dentin after each adhesive system was applied. The bonded specimens were stored in water for 24 h and sectioned into beams. Microtensile testing was done, and the data were subjected to ANOVA and Fisher's PLSD test. Results The μTBS of All-Bond 2 and One- Step Plus was not affected by the type of resin composite used (p=0.3131 and p=0.1562, respectively). The μTBS of OptiBond Solo Plus was significantly reduced when used with selfcured resin composite (p<0.0001). Peak SE formed no bond of self-cured resin composite to dentin. Conclusions Some adhesives do not effectively bond self-cured resin composite to dentin. Clinical Significance Incompatibility between adhesives with low pH and certain self-cured resin composites can cause clinical debonding of restorations. Citation Walter R, Macedo GV, Oliveira GMS, Swift Jr EJ. Adhesive Bond Strengths Using Self- and Light-Cured Composites. J Contemp Dent Pract [Internet]. 2009 Nov; 10(6):025-032. Available from: http://www.thejcdp.com/journal/ view/volume10-issue6-walter.

scholarly journals Effect of Dentin Bonding Agents, Various Resin Composites and Curing Modes on Bond Strength to Human Dentin

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3395
Author(s):  
Rene Steiner ◽  
Daniel Edelhoff ◽  
Bogna Stawarczyk ◽  
Herbert Dumfahrt ◽  
Isabel Lente
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Adhesive System ◽  
Resin Composites ◽  
Adhesive Systems ◽  
Bonding Agents ◽  
Soft Start ◽  
Human Dentin ◽  
One Step ◽  
Push Out

This study investigated the influence of several dentin bonding agents, resin composites and curing modes on push-out bond strength to human dentin. 360 extracted caries-free third molars were prepared, cut into slices, embedded in epoxy resin and perforated centrally. One half of the specimens (180) were treated by using one-step adhesive systems and the other half (180) with multi-step adhesive systems. Subsequently, the cavities were filled with either universal, flowable or bulk-fill resin composite according to the manufactures’ product line and cured with either turbo or soft start program. After storage the push-out test was performed. The data was analyzed using Kolmogorov-Smirnov, three- and one-way ANOVA followed by the Scheffé post-hoc test, unpaired two-sample t-test (p < 0.05). The strongest influence on push-out bond strength was exerted by the resin composite type (partial eta squared ηP2 = 0.505, p < 0.001), followed by the adhesive system (ηP2 = 0.138, p < 0.001), while the choice of the curing intensity was not significant (p = 0.465). The effect of the binary or ternary combinations of the three parameters was significant for the combinations resin composite type coupled adhesive system (ηP2 = 0.054, p < 0.001), only. The flowable resin composites showed predominantly mixed, while the universal and bulk-fill resin composite showed adhesive failure types. Cohesive failure types were not observed in any group. Multi-step adhesive systems are preferable to one-step adhesive systems due to their higher bond strength to dentin. Flowable resin composites showed the highest bond strength and should become more important as restoration material especially in cavity lining. The use of a soft start modus for polymerization of resin composites does not enhance the bond strength to dentin.

Microcomputed Tomography Evaluation of Polymerization Shrinkage of Class I Flowable Resin Composite Restorations

2017 ◽  
Vol 42 (1) ◽  
pp. E16-E23 ◽  
Author(s):  
CS Sampaio ◽  
K-J Chiu ◽  
E Farrokhmanesh ◽  
M Janal ◽  
RM Puppin-Rontani ◽  
...  
Keyword(s):  
Resin Composite ◽  
Three Dimensional ◽  
Adhesive System ◽  
Microcomputed Tomography ◽  
Occlusal Surface ◽  
Class I ◽  
Polymerization Shrinkage ◽  
Significant Difference ◽  
Group 2 ◽  
Post Hoc

SUMMARY The present study aimed to characterize the pattern and volume of polymerization shrinkage of flowable resin composites, including one conventional, two bulk fill, and one self-adhesive. Standardized class I preparations (2.5 mm depth × 4 mm length × 4 mm wide) were performed in 24 caries-free human third molars that were randomly divided in four groups, according to the resin composite and adhesive system used: group 1 = Permaflo + Peak Universal Bond (PP); group 2 = Filtek Bulk Fill + Scotchbond Universal (FS); group 3 = Surefil SDR + XP Bond (SX); and group 4 = Vertise flow self-adhering (VE) (n=6). Each tooth was scanned three times using a microcomputed tomography (μCT) apparatus. The first scan was done after the cavity preparation, the second after cavity filling with the flowable resin composite before curing, and the third after it was cured. The μCT images were imported into three-dimensional rendering software, and volumetric polymerization shrinkage percentage was calculated for each sample. Data were submitted to one-way analysis of variance and post hoc comparisons. No significant difference was observed among PP, FS, and VE. SX bulk fill resin composite presented the lowest values of volumetric shrinkage. Shrinkage was mostly observed along the occlusal surface and part of the pulpal floor. In conclusion, polymerization shrinkage outcomes in a 2.5-mm deep class I cavity were material dependent, although most materials did not differ. The location of shrinkage was mainly at the occlusal surface.

The Effect of Fiber Dowel Heights in Resin Composite Cores on Restoration Failures of Endodontically Treated Teeth

2009 ◽  
Vol 35 (2) ◽  
pp. 63-69 ◽  
Author(s):  
Trakol Mekayarajjananonth ◽  
Nattinee Chitcharus ◽  
Sheldon Winkler ◽  
Meredith C. Bogert
Keyword(s):  
Fracture Resistance ◽  
Resin Composite ◽  
Endodontically Treated Teeth ◽  
Tooth Structure ◽  
Fiber Posts ◽  
Group 3 ◽  
Group 5 ◽  
Group 2 ◽  
Group 1

Abstract In vitro and in vivo testing suggest that fiber posts may reduce the incidence of root fractures of endodontically treated teeth. The purpose of this in vitro study was to compare the effect of fiber post height in resin composite cores on the fracture resistance of endodontically treated teeth. Forty maxillary central incisors were randomly divided into 2 control groups (Groups 1 and 2) of 5 teeth each, and 3 experimental groups (Groups 3, 4, and 5) of 10 teeth each. The teeth in Group 1 had their opening restored with composite resin, the teeth in Group 2 were restored with quartz fiber posts without resin composite cores, and the teeth in Groups 3, 4, and 5 were restored with quartz fiber posts of 2, 4, and 6 mm high, respectively, in 6-mm resin composite cores. Ceramic crowns were fabricated for the specimens. Specimens were positioned in a mounting device and aligned at a 130-degree angle to the long axis of each tooth. A universal testing machine was used to apply constant load at a crosshead speed of 0.5 mm/min until failure occurred. The highest fracture load and mode of failure of each specimen was recorded. The highest fracture resistance force was observed in Group 2 (290.38 ± 48.45 N) and decreased, respectively, in Group 1 (238.98 ± 26.26 N), Group 5 (228.35 ± 58.79 N), Group 4 (221.43 ± 38.74 N), and Group 3 (199.05 ± 58.00 N). According to one-way analysis of variance (ANOVA) and Duncan's test (P ≤ .05), there was no statistically significant increase in the force from Group 3 to Group 5, and the force in Group 2 was significantly higher than that of the experimental groups. There was no statistical significance difference in force among the experimental groups, and the amount of residual tooth structure was found to be the critical factor in fracture resistance. The results suggest that endodontically treated teeth should be restored with the longest possible post height while preserving maximum tooth structure.

scholarly journals Resin composite repair: Quantitative microleakage evaluation of resin-resin and resin-tooth interfaces with different surface treatments

2015 ◽  
Vol 09 (01) ◽  
pp. 092-099 ◽  
Author(s):  
Cigdem Celik ◽  
Sevi Burcak Cehreli ◽  
Neslihan Arhun
Keyword(s):  
Image Analysis ◽  
Resin Composite ◽  
Middle Part ◽  
Surface Treatments ◽  
Resin Composites ◽  
Adhesive Systems ◽  
Air Abrasion ◽  
Composite Repair ◽  
Composite Type ◽  
Group 2

ABSTRACT Objective: The aim was to evaluate the effect of different adhesive systems and surface treatments on the integrity of resin-resin and resin-tooth interfaces after partial removal of preexisting resin composites using quantitative image analysis for microleakage testing protocol. Materials and Methods: A total of 80 human molar teeth were restored with either of the resin composites (Filtek Z250/GrandioSO) occlusally. The teeth were thermocycled (1000×). Mesial and distal 1/3 parts of the restorations were removed out leaving only middle part. One side of the cavity was finished with course diamond bur and the other was air-abraded with 50 μm Al2O3. They were randomly divided into four groups (n = 10) to receive: Group 1: Adper Single Bond 2; Group 2: All Bond 3; Group 3: ClearfilSE; Group 4: BeautiBond, before being repaired with the same resin composite (Filtek Z250). The specimens were re-thermocycled (1000×), sealed with nail varnish, stained with 0.5% basic fuchsin, sectioned mesiodistally and photographed digitally. The extent of dye penetration was measured by image analysis software (ImageJ) for both bur-finished and air-abraded surfaces at resin-tooth and resin-resin interfaces. The data were analyzed statistically. Results: BeautiBond exhibited the most microleakage at every site. Irrespective of adhesive and initial composite type, air-abrasion showed less microleakage except for BeautiBond. The type of initial repaired restorative material did not affect the microleakage. BeautiBond adhesive may not be preferred in resin composite repair in terms of microleakage prevention. Conclusions: Surface treatment with air-abrasion produced the lowest microleakage scores, independent of the adhesive systems and the pre-existing resin composite type. Pre-existing composite type does not affect the microleakage issue. All-in-one adhesive resin (BeautiBond) may not be preferred in resin composite repair in terms of microleakage prevention.

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