scholarly journals Effect of Storage Temperature on Bond Strength of a Self-Etch Adhesive System to Pulp Chamber Dentin

2009 ◽  
Vol 03 (04) ◽  
pp. 314-317
Author(s):  
Nazmiye Donmez ◽  
Hale Ari ◽  
Sema Belli
Keyword(s):  
Bond Strength ◽  
Storage Temperature ◽  
Adhesive System ◽  
Pulp Chamber ◽  
Group 4 ◽  
Significant Difference ◽  
Molar Teeth ◽  
Group 3 ◽  
Group 2 ◽  
Self Etch

ABSTRACTObjectives: The aim of this study was to evaluate the effect of storage temperature on bond strength of a self etching primer system to pulp chamber dentin.Methods: SE Bond (Kuraray, JAPAN) adhesive system and Clearfil Photo Posterior (Kuraray, JAPAN) composite resin were used. Eight extracted caries-free human molar teeth were used. Access cavities were prepared through the pulp chamber, randomly distributed into 4 groups and prepared as follows: Group 1 (Control): SE Primer and SE Bond (SEB) were applied to the pulp chamber dentin according to the manufacturer’s instructions, immediately after the delivery from the manufacturer and then the pulp chamber was restored with a resin restorative material. The primer agent of the following groups was stored in a refrigerator and kept at 4�C. Group 2: restored with SEB, kept at 4°C refrigerator for 1 year, Group 3: restored with SEB kept at 23°C room temperature for 1 year and Group 4: restored with SEB kept at 40°C incubator for 1 year. After 24 hrs the teeth were trimmed for microtensile bond testing and loaded to failure at 1mm/min. Data were analyzed using one-way ANOVA and Duncan test (P<.05).Results: The results indicated that Group 4 showed lowest bond strength when compared to the others (P<.05). No statistically significant difference was found among the other groups (P>.05).Conclusions: As a result of this study, it was concluded that increasing storing temperature or storing period decreases microtensile bond strength of a SEB system to pulp chamber dentin. (Eur J Dent 2009;3:314-317)

scholarly journals The Effects of Prophylactic Ozone Pretreatment of Enamel on Shear Bond Strength of Orthodontic Brackets Bonded with Total or Self-Etch Adhesive Systems

2010 ◽  
Vol 04 (04) ◽  
pp. 367-373 ◽  
Author(s):  
Sevi Burcak Cehreli ◽  
Asli Guzey ◽  
Neslihan Arhun ◽  
Alev Cetinsahin ◽  
Bahtiyar Unver
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Orthophosphoric Acid ◽  
Ozone Treatment ◽  
Bond Failure ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
Self Etch ◽  
Group 1

Objectives: The aim of this in vitro study is to determine (1) shear bond strength (SBS) of brackets bonded with self-etch and total-etch adhesive after ozone treatment (2) bond failure interface using a modified Adhesive Remnant Index (ARI).Methods: 52 premolars were randomly assigned into four groups (n=13) and received the following treatments: Group 1: 30 s Ozone (Biozonix, Ozonytron, Vehos Medikal, Ankara, Turkey) application + Transbond Plus Self-Etching Primer (SEP) (3M) + Transbond XT (3M), Group 2: Transbond Plus SEP + Transbond XT, Group 3: 30 s Ozone application + 37% orthophosphoric acid + Transbond XT Primer (3M) + Transbond XT, Group 4: 37% orthophosphoric acid + Transbond XT Primer + Transbond XT. All samples were stored in deionised water at 37oC for 24 hours. Shear debonding test was performed by applying a vertical force to the base of the bracket at a cross-head speed of 1 mm/min.Results: The mean SBS results were Group 1: 10.48 MPa; Group 2: 8.89 MPa; Group 3: 9.41 MPa; Group 4: 9.82 MPa. One-Way Variance Test revealed that the difference between the groups was not statistically significant (P=0.267). Debonded brackets were examined by an optical microscope at X16 magnification to determine the bond failure interface using a modified ARI. The results were (mean) Group 1: 2.38; Group 2: 1.31; Group 3: 3.00; Group 4: 1.92. Multiple comparisons showed that Groups 1 and 2, 2 and 3, 3 and 4 were statistically different (P=0.014, P<.001 and P=0.025).Conclusions: Ozone treatment prior to bracket bonding does not affect the shear bond strength. (Eur J Dent 2010;4:367-373)

scholarly journals Microleakage beneath Ceramic and Metal Brackets Bonded with a Conventional and an Antibacterial Adhesive System

2006 ◽  
Vol 76 (6) ◽  
pp. 1028-1034 ◽  
Author(s):  
Neslihan Arhun ◽  
Ayca Arman ◽  
Sevi Burçak Çehreli ◽  
Serdar Arıkan ◽  
Erdem Karabulut ◽  
...  
Keyword(s):  
Adhesive System ◽  
White Spot Lesions ◽  
Adhesive Interface ◽  
Group 4 ◽  
Significant Difference ◽  
Ceramic Brackets ◽  
Group 3 ◽  
Group 2 ◽  
Ceramic Bracket ◽  
Nail Varnish

Abstract Objective: To assess microleakage of a tooth-adhesive-bracket complex when metal or ceramic brackets were bonded with a conventional and an antibacterial self-etching adhesive. Materials and Methods: Forty freshly extracted human premolars were randomly assigned to four equal groups and received the following treatments: group 1 = Transbond XT + metal bracket, group 2 = Transbond XT + ceramic bracket, group 3 = Clearfil Protect Bond + ceramic bracket, and group 4 = Clearfil Protect Bond + metal bracket. After photopolymerization, the teeth were kept in distilled water for 1 month and thereafter subjected to thermal cycling (500 cycles). Specimens were further sealed with nail varnish, stained with 0.5% basic fuchsin for 24 hours, sectioned and examined under a stereomicroscope, and scored for marginal microleakage for the adhesive-tooth and bracket-adhesive interfaces from incisal and gingival margins. Statistical analysis was accomplished by Kruskal-Wallis test and Mann-Whitney U-test with Bonferroni correction. Results: All groups demonstrated microleakage between the adhesive-enamel and bracket-adhesive interfaces. A significant difference was observed among all groups (P &lt; .05) for the microleakage between the bracket-adhesive interface. Metal brackets exhibited significantly more microleakage than did ceramic brackets between the bracket-adhesive interface with either of the adhesives. Clearfil Protect Bond exhibited results similar to Transbond XT. Clearfil Protect Bond may be a choice of adhesive in bracket bonding because of its antibacterial activity and similar microleakage results with the orthodontic adhesive. Conclusions: Metal brackets cause more leakage between an adhesive-bracket interface, which may lead to lower clinical shear bond strength and white-spot lesions.

Dentin Bond Strength of Composites with Self-etching Adhesives Using LED Curing Lights

2007 ◽  
Vol 8 (5) ◽  
pp. 34-42 ◽  
Author(s):  
Yonca Korkmaz ◽  
Nuray Attar
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Significance Level ◽  
Group 4 ◽  
Group 6 ◽  
Group 3 ◽  
Curing Light ◽  
Group 5 ◽  
Group 2 ◽  
Self Etch

Abstract Aim The purpose of this study was to investigate the effect of light-emitting diode (LED) light curing units (LCUs) compared with halogen LCUs on the shear bond strength (SBS) of one nanofill composite (Filtek Supreme) and one microhibrid composite (Artemis) with self-etch adhesives. Methods and Materials The buccal surfaces of 60 non-carious extracted human molars were flattened to expose dentin and, subsequently, polished for 60 seconds with 600-grit wet silicon carbide abrasive paper. Specimens were assigned into six groups (n=10) according to composite material, self-etch adhesive, and curing light used as follows: Group 1: Adper Prompt L-Pop (AP) and Filtek Supreme (FS) using an Elipar Free Light (EFL); Group 2: AP and FS using an Elipar Free Light 2 (EFL2); Group 3: AP and FS using a Hilux Expert (HE) light, Group 4: AdheSE (AS)+Artemis (AR) using an EFL; Group 5: AS+AR using an EFL2; and Group 6: AS+AR using a HE light. The specimens were thermocycled for 500 cycles (5°C–55°C) and then loaded to failure in a Zwick universal testing machine at a crosshead speed of 5 mm/minute. SBS values were calculated as megapascals (MPa) and statistically analyzed using the one-way analysis of variance (ANOVA) test at a significance level of 0.05. Results Mean SBS (± standard deviations) values were as follows: Group1: 15.99±5.18; Group 2: 18.76±6.71; Group 3: 17.70±5.04; Group 4: 16.93±3.99; Group 5: 18.01±5.19, and Group 6: 17.46±5.40. There were no statistically significant differences for SBS to dentin among the groups tested. Conclusion The LED curing lights used in the study seem to be comparable with the halogen curing light for nanofill and microhybrid composites used in conjunction with self-etching systems in dentin. The EFL2 reduces curing time, which can be considered as an advantage. Citation Korkmaz Y, Attar N. Dentin Bond Strength of Composites with Self-etching Adhesives Using LED Curing Lights. J Contemp Dent Pract 2007 July;(8)5:034-042.

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.

Effect of Multiple Consecutive Applications of One-step Self-etch Adhesive on Microtensile Bond Strength

2009 ◽  
Vol 10 (2) ◽  
pp. 67-74 ◽  
Author(s):  
Hacer Deniz Arisu ◽  
Hüma Ömürlü ◽  
Evrim Eligüzeloğlu ◽  
Mine Üçtaşli
Keyword(s):  
Bond Strength ◽  
Adhesive System ◽  
Microtensile Bond Strength ◽  
One Step ◽  
Group 3 ◽  
Group 2 ◽  
Adhesive Application ◽  
Self Etch ◽  
Group 1

Abstract Aim The aim of this study was to evaluate the effects of multiple consecutive coatings of a one-step self-etch adhesive system (Clearfil Tri-S Bond) on the microtensile bond strength (MBS) to dentin. Methods and Materials Nine caries-free human lower third molars were sectioned perpendicular to the long axis to expose the mid-coronal dentin. The teeth were separated into three experimental groups (n=3) according to the number of adhesive resin coats applied. In Group 1 one layer of Clearfil Tri-S Bond was applied according to the manufacturer's instructions. In Group 2 and Group 3 the adhesive was applied in two and three layers, respectively. In these two groups the first layer was applied according to the manufacturer's instructions but the second and third layers of adhesive were not light cured after application. After the placement of the composite, the teeth were sectioned to obtain approximately 1 mm2 beams for testing. Eighteen beams were prepared for each group using the ‘non-trimming’ method. The MBS values of all specimens were tested, and fracture modes were then determined using a stereomicroscope. Results The mean MBS values (in MPa) of Group 1 (one coat of the adhesive) was significantly lower (p=0.04) than those of Group 3 (three applied coats of the adhesive). There were no statistically significant differences between Groups 1 and 2 and Groups 2 and 3. Conclusion Within the limitations of this in vitro study the application of multiple coats of a one-step self-etch adhesive may provide an increase in bond strength compared to the application of only one coat of adhesive. Clinical Significance Three consecutive coats of one-step self-etching adhesive application can improve MBS. Citation Arisu HD, Eligüzeloğlu E, Üçtaşli M, Ömürlü H. Effect of Multiple Consecutive Applications of One-step Self-etch Adhesive on Microtensile Bond Strength. J Contemp Dent Pract 2009 March; (10)2:067-074.

scholarly journals Evaluation of marginal microleakage in composite restorations with different placement techniques

2018 ◽  
Vol 8 (2) ◽  
pp. 70-77
Author(s):  
Umut Misilli ◽  
Fikret Yılmaz
Keyword(s):  
In Vitro Study ◽  
Adhesive System ◽  
Class Ii ◽  
Group 4 ◽  
Incremental Placement ◽  
Molar Teeth ◽  
Blue Solution ◽  
Group 3 ◽  
Group 2

Aim: The purpose of this in vitro study was to evaluate the effect of different layering techniques (bulk, oblique, centripetal, split horizontal) on the marginal microleakage of Class II adhesive restorations. Methodology: Forty-eight standardised Class II cavities were prepared on both mesial and distal sides of extracted non-carious human molar teeth. Following preparation, all specimens were randomly divided into four groups (n=12). Group 1: bulk technique; Group 2: oblique incremental technique; Group 3: centripetal incremental technique; Group 4: split horizontal incremental technique. The teeth were restored with a total-etch adhesive system and a microhybrid composite resin. After thermocycling and immersion in a 0.2% methylene blue solution for 24 hours, the restorations were sectioned, and dye penetration was evaluated under a stereomicroscope. The microleakage scores (0 to 4) obtained from the occlusal and gingival margins were analysed with Kruskal-Wallis and Mann-Whitney U tests (p<0,05). Results: Incremental placement techniques showed lower microleakage compared with bulk and lower microleakage was seen at occlusal margin compared with gingival margin. However, there were no statistically significant differences among four placement techniques and the margins (p>0,05). Conclusion: Based on the results of the present study, none of the four placement techniques were found to be effective in eliminating marginal microleakage entirely in Class II restorations. All of the placement techniques showed similar results when the cavity margins were located on the enamel.

scholarly journals Influence of Storage Temperature on Orthodontic Elastics

2021 ◽  
Author(s):  
R Piradhiba ◽  
Evan A Clement ◽  
Navaneetha Nambi ◽  
S Veerasankar ◽  
S Madhumitra ◽  
...  
Keyword(s):  
Maximum Stress ◽  
Storage Temperature ◽  
Control Group ◽  
Maximum Elongation ◽  
Group 4 ◽  
Significant Difference ◽  
Group 3 ◽  
Group 2 ◽  
Storage Temperatures ◽  
Group 1

Introduction: Orthodontic elastics are a very significant tool in orthodontics, as it is the most commonly used force delivering unit. Temperature plays a key role in the amount of force that elastics are able to produce. Hence, there is a need to evaluate the influence of storage temperature on the properties of orthodontic elastics before its clinical use. Aim: To evaluate the influence of different storage temperature of latex orthodontic elastics. Materials and Methods: This cross-sectional study was conducted at Sathyabama Dental College and Hospital, Chennai, in November 2019. Sample of 40 latex orthodontic elastics (TP Orthodontics, medium force, standard size of 3/16′′) were divided into four groups with 10 elastics each, based on their storage temperature and stored in closed plastic packages. Group 1 was kept as a Control group and Group 2, Group 3 and Group 4 were stored in three Incubators under the specified storage temperatures such as 26-28°C, 4-8°C, 37°C respectively. The elastics were stretched and their forces measured in six progressive increases of 100% of their inner diameter, starting at a level of 100% stretching, with the Universal Testing Machine, Instron. The samples were also tested for Maximum Stress (MPa), Maximum Force (N), Maximum Elongation (%) and Break Distance (mm). Data were analysed using Statistical Package for the Social Science (SPSS) software version 16.0, one-way Analysis of Variance (ANOVA) and post-hoc test. Results: On evaluating the stress at 100%, 200%, 300%, 400%, 500%, 600% of strain, there was no statistically significant difference between the groups. Maximum Stress MPa was found to be 24.12±3.32, 25.12±3.42, 23.3±3.41, 23.97±3.50 for group1, group 2, group 3 and group 4 respectively. Maximum Elongation (%) was found to be 1369.0±25.108, 1364.0±23.190, 1359.0±35.103, 1363.0±34.657 for group 1, group 2, group 3 and group 4, respectively. Break Distance (mm) was found to be 68.48±1.267, 68.28±1.267, 67.87±1.77 and 68.19±1.727 for group1, group 2, group 3 and group 4, respectively. And none of the parameters tested showed statistical significance between the four groups. Conclusion: Latex elastics may be stored under any of the conditions tested in the present study over a period of one month, since different storage temperatures over a period of one month did not interfere in their mechanical properties.

scholarly journals Comparison of Shear Bond Strength of Four Types of Orthodontic Brackets with Different Base Technologies

2017 ◽  
Vol 7 ◽  
pp. 273-278
Author(s):  
Gaurang H. Chaudhary ◽  
Gianina Salton Mattevi ◽  
Peter Thiuri Gakunga
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Group 4 ◽  
Significant Difference ◽  
Acid Etch ◽  
Group 3 ◽  
The Difference ◽  
Group 2 ◽  
Group 1

Objectives The aim of this study was to compare the shear bond strength (SBS) of brackets systems with four different base technologies. Materials and Methods Maxillary first premolars were randomly divided into four groups of thirty specimens each: (1) Master Series™ conventional twin, (2) T3™ self-ligating, (3) Victory series™ conventional twin, and (4) H4™ self-ligating brackets. Maxillary first premolars were bracketed using an acid-etch composite system, and the SBS measured using an Instron Universal Testing Machine at a crosshead speed of 2 mm/min. The ANOVA and Tukey’s multiple comparison tests were performed with significance predetermined at P ≤ 0.05. Results The overall mean bond strengths were 8.49 ± 2.93, 10.85 ± 3.34, 9.42 ± 2.97, and 9.73 ± 2.62 for the Groups 1, 2, 3, and 4 brackets, respectively. One-way ANOVA test gave an F = 3.182 with a P = 0.026. The Group 1 and Group 2 were observed to have statistically significant difference with a P = 0.014. Conclusions The T3 self-ligating one-piece design with microetched Quadra Grip™ base brackets had the highest bond strength. The SBS difference between Group 2, Group 3, and Group 4 was not significant, but the difference between Group 2 and Group 1 was statistically significant.

scholarly journals Influence of bleaching and desensitizing gel on bond strength of orthodontic brackets

2015 ◽  
Vol 20 (2) ◽  
pp. 49-54 ◽  
Author(s):  
Fernanda Alves Rodrigues Britto ◽  
Adriana Simoni Lucato ◽  
Heloisa Cristina Valdrighi ◽  
Sílvia Amélia Scudeler Vedovello
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Group 4 ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Group 3 ◽  
Group 5 ◽  
Group 2 ◽  
Bovine Enamel ◽  
Group 1

OBJECTIVE: The objective of this study was to assess, in vitro, the influence of bleaching gel and the use of desensitizing agent over bond strength of ceramic brackets bonded to bovine enamel. METHODS: One hundred bovine incisors were selected and randomly divided into five groups (n = 20): Group 1, control group (without bleaching); Group 2, bleached with 35% hydrogen peroxide; Group 3, bleached with 35% hydrogen peroxide (three applications, 15 minutes each) and desensitizing agent applied for 10 minutes; Group 4, bleached with 35% hydrogen peroxide for 40 minutes; Group 5, bleached with 35% hydrogen peroxide for 40 minutes with desensitizing agent applied for 10 minutes. Brackets were bonded 7 days after bleaching and submitted to shear bond strength test after 24 hours at a compression rate of 1 mm/minute. After fracture, the adhesive remnant index (ARI) was assessed under stereoscopic at 40 x magnification. Shear strength data (MPa) were submitted to one-way ANOVA and Tukey's test with significance level set at 5%. RESULTS: Group 5 (29.33 MPa) showed significantly higher bond strength than Group 1 (19.19 MPa), Group 2 (20.59 MPa) and Group 4 (23.25 MPa), but with no difference in comparison to Group 3. There was no significant difference among the other groups. The adhesive remnant index showed predominance of score 3, that is, all resin remained adhered to enamel for all groups. CONCLUSION: Bleaching with 35% hydrogen peroxide with calcium associated with desensitizing agent application produced higher bond strength values of brackets bonded to bovine enamel.

scholarly journals Effect of Artificial Saliva Contamination on Bond Strength to Pulp Chamber Dentin

2008 ◽  
Vol 02 (02) ◽  
pp. 086-090 ◽  
Author(s):  
Hale Ară ◽  
Nazmiye Dönmez ◽  
Sema Belli
Keyword(s):  
Bond Strength ◽  
Artificial Saliva ◽  
In Vitro Study ◽  
Adhesive System ◽  
Control Group ◽  
Pulp Chamber ◽  
Significant Difference ◽  
Group 2 ◽  
Saliva Contamination

ABSTRACTObjectives: The purpose of this in vitro study was to evaluate the effect of artificial saliva contamination on microtensile bond strength to pulp chamber dentin.Methods: Clearfil SE Bond (SEB) (Kuraray, JAPAN) adhesive system and Clearfil Photo Posterior (CPP) (Kuraray, JAPAN) composite resin were used. Twenty extracted caries-free human molar teeth were randomly distributed into four groups. Apart from a control group without contamination (Group 1), primed dentin surfaces were contaminated with artificial saliva (10 s), rinsed, dried, reprimed and bonded (Group 2), coated with adhesive, contaminated with artificial saliva, rinsed, dried, bonding procedures were repeated (Group 3), coated with adhesive, light cured, contaminated with saliva, rinsed, dried, treated with SE primer (SEP) and SEB (Group 4).After 24 hrs, the teeth were prepared for microtensile bond testing and tensile bond strength was measured (1mm/min). The data was calculated as MPa and analyzed using one-way ANOVA and Duncan test (P<.05).Results: The results indicated that Group 2 showed lowest bond strength when compared to the others (P<.05). No statistically significant difference was found between Groups 3 and 4 (P>.05).Conclusions: It was concluded that contamination during priming procedure has a negative effect on bond strength (P<.05). Although contamination of the uncured adhesive was not critical in this study (P>.05) any kind of contamination of the bonding area should, in principle, be avoided. (Eur J Dent 2008;2:86-90)

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