scholarly journals Influence of irrigating agents on fiber postpush-out bond strength to radicular dentin sections with the different adhesive system

2017 ◽  
Vol 11 (03) ◽  
pp. 380-384 ◽  
Author(s):  
Satheesh B. Haralur ◽  
Asim Nasser A. Alasabi ◽  
Sultan A. Abohathrah Al Qahtani ◽  
Saeed Musleh S. Alqahtani
Keyword(s):  
Bond Strength ◽  
Ethylenediaminetetraacetic Acid ◽  
Adhesive System ◽  
Negative Influence ◽  
Significant Difference ◽  
Group A ◽  
Coronal Section ◽  
Group B ◽  
Self Etch ◽  
Push Out

ABSTRACT Objective: The objective of this study is to evaluate the effect of irrigating agents on push-out bond strength of resin postcemented with various adhesive systems at different radicular dentin sections. Materials and Methods:Sixty single-rooted premolar teeth were root canal treated, subsequently decorated at cementoenamel junction. The endodontic postspace was irrigated with 5.25% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA) for Group A (n = 30) and Group B (n = 30), respectively. The sample from each group was subdivided into three groups (10) according to luting protocol of etch-wash, self-etch, and self-adhesive. Individual teeth with cemented resin postsamples were sectioned into coronal, middle, and apical segments. Subsequently, subjected for pushout bond strength test by applying a load at 0.5 mm/min speed. The data were analyzed by three-way analysis of variance and Tukey comparison test at a significant difference level of 0.05.Results: The coronal section with 5.25% NaOCl irrigation and self-etch luting protocol provided the highest push out strength at 16.282 Mpa. The etch-wash luting protocol in both irrigations showed the lesser bond strength at 8.273 and 8.493 MPa, respectively, in coronal section.Conclusions: The self-etch adhesive system showed better push out bond strength and 17% EDTA had a negative influence on self-etch bond strength. The coronal sections had highest bond strength in comparison with apical radicular dentin sections.

scholarly journals Evaluation of internal adaptation of flowable and bulk-fill resin-based composites

2021 ◽  
Vol 28 ◽  
pp. 23-31
Author(s):  
Ros Anita Omar ◽  
Noor Azlin Yahya ◽  
Christina Maria Noel ◽  
Nor Suhana Azni Satapa
Keyword(s):  
Adhesive System ◽  
Adhesive Failure ◽  
Cohesive Failure ◽  
Sem Images ◽  
Occlusal Surfaces ◽  
Significant Difference ◽  
Group A ◽  
Internal Adaptation ◽  
Group B ◽  
Self Etch

This study aimed to evaluate and compare the internal adaptation of bulk-fill resin-based composite restorative materials with flowable composites as lining materials using self-etch adhesive system. Class I cavities (2mmx4mm) were prepared on flattened occlusal surfaces of fifty extracted human premolars and randomly assigned into five groups (n=10) according to the materials used: Beautifil Bulk-fill Restorative (BR); Beautifil Bulk-fill Flowable (BF); Beautifil Flow Flowable F10 (BF10); and Self-etch adhesive (SEA). Group A: SEA+BR; Group B: SEA+BF10+BR; Group C: SEA+BF+BR; Group D: SEA+BF10+SEA+BR and Group E: SEA+BF+SEA+BR. The samples were thermocycled for 500 cycles, then sectioned mesiodistally, polished and pre-treated prior to scanning electron microscopy (SEM) evaluation. From SEM images, measurement of adhesive and cohesive adaptation failures was recorded at multiple sites of the pulpal floor and in between materials. Data were analysed using one-way ANOVA and post-hoc Tukey tests (p<0.05). Cohesive failure in SEA was observed at the pulpal floor with the lowest percentage in Group A (5.14%), and highest in Group C and E (>16%). However, there were no significant difference among all groups. Adhesive failure was seen at the pulpal floor between SEA+BF/BF10/BR and between SEA+dentine with the highest percentage of gaps formed in Group A between SEA+dentine (6.62%) and SEA+BR (5.30%). Nonetheless, no significant differences were observed among all groups with p=0.89 and p=0.70, respectively. With the use of BF/BF10 at the pulpal floor, adhesive failure was reduced but resulted in increased of cohesive failure. However, both adaptation failures were absent between materials (BF/BF10 and BR) regardless with or without application of SEA.

scholarly journals Effect of cement type and thickness on push-out bond strength of fiber posts

2018 ◽  
Vol 12 (4) ◽  
pp. 277-282
Author(s):  
Farzaneh Farid ◽  
Khadijeh Rostami ◽  
Sareh Habibzadeh ◽  
MohammadJavad Kharazifard
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Test Results ◽  
Resin Cements ◽  
Fiber Posts ◽  
Significant Difference ◽  
Root Dentin ◽  
Group 2 ◽  
Self Etch ◽  
Push Out

Background. This study investigated the effect of the thickness of two resin cements on push-out bond strength of fiber posts to root dentin. Methods. Sixty decoronated single-rooted teeth were endodontically treated. The specimens were then randomly allocated to two groups (n=30); group 1: drill size 90 w, matching the size of fiber posts used; group 2: drill size 110, larger than the posts. The specimens in each group were divided into 2 subgroups (n=15); subgroup SE, in which the posts were cemented with self-etch Panavia F2.0 and subgroup SA, in which self-adhesive Panavia cement was used. After 72 hours, 2 slices with 1 mm of thickness were prepared from the mid-root of each specimen. Push-out bond strength test was performed in a universal testing machine at a crosshead speed of 1 mm/min. Data were analyzed with two-way ANOVA and t-test. Results. The mean bond strengths of the posts cemented in matched-size spaces for SE and SA groups were 4.02±1.6 and 4.12±2.3 MPa, respectively. For posts cemented in oversized spaces, the values were 4.9±2.3 and 2.8±1.3 MPa, respectively. In matched-size spaces, there was no significant difference between the two groups. Conclusion. The results of this study suggested that increasing the cement thickness would reduce the bond strength of fiber posts to root dentin when self-adhesive cements are used; however, self-etch adhesives were not affected.

scholarly journals Effect of Dentin Pretreatment with Chlorhexidine on Push-Out Bond Strength of Composite Restorations in Severely Damaged Primary Anterior Teeth

2020 ◽  
Author(s):  
Shabnam Milani ◽  
Bahman Seraj ◽  
Zahra Khoshlafz ◽  
Niusha Abazarian
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Bonding Agent ◽  
Bonding Agents ◽  
Composite Restorations ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Self Etch ◽  
Push Out

Objectives: Achieving durable restorations with adequate strength in severely damaged primary anterior teeth in children is a priority. The aim of this study was to investigate the effect of dentin pretreatment with chlorhexidine on push-out bond strength of composite restorations. Materials and Methods: In this in vitro experimental study, 56 extracted primary anterior teeth were randomly divided into 4 groups: (1) saline and total-etch bonding agent, (2) chlorhexidine and total-etch bonding agent, (3) saline and self-etch bonding agent, and (4) chlorhexidine and self-etch bonding agent. After the application of bonding agents, the post space was filled with Z250 composite resin. Following thermocycling of the samples, the push-out test was performed using a universal testing machine, and the results were analyzed with two-way ANOVA. Results: The mean push-out bond strength values in groups 1 to 4 were 5.7, 8.39, 5.35, and 7 MPa, respectively. Chlorhexidine groups had significant differences with saline groups in bond strength (P<0.05) but there was no statistically significant difference between the self-etch and total-etch bonding agents in the groups (P>0.05). Conclusion: Both types of bonding agents (self-etch and total-etch) exhibited favorable results in radicular dentin of primary anterior teeth; however, pre-treatment with chlorhexidine increased the push-out bond strength of composite restorations in primary anterior teeth.

Comparison of successful outcome of pit and fissure sealants bonded with etch-and-rinse adhesive and self-etch adhesive system

2021 ◽  
pp. 1-7
Author(s):  
Jiand Malik Baloch ◽  
Muhammad Adeel Ahmed ◽  
Azeem Ul Yaqin Syed ◽  
Muhammad Zohaib Younus ◽  
Muhammad Owais Nasim ◽  
...  
Keyword(s):  
Adhesive System ◽  
Successful Outcome ◽  
Fissure Sealants ◽  
Pit And Fissure Sealants ◽  
Etch And Rinse ◽  
Molar Teeth ◽  
Group A ◽  
Group B ◽  
Self Etch

BACKGROUND: Dental caries is one of the most common diseases around the world. The newly erupted permanent posterior teeth are at great risk due to the complex occlusal morphology of pits and fissures, infraocclusion and incomplete maturation of enamel. Pit and fissure sealants are the treatment of choice in such conditions. OBJECTIVES: To compare the successful outcome of pit and fissure sealants bonded with etch-and-rinse adhesive system and self-etch adhesive systems in newly erupted permanent first molars. METHODS: This randomized clinical trial was conducted at the Fatimah Jinnah Dental Hospital from June 2017 to May 2019. Children aged between 6 to 9 years who fulfilled the inclusion criteria were recruited for this study after parents’ consent. Patients were randomly divided into two groups by the lottery method. Thirty patients with 60 first molar teeth in Group A were treated with etch-and-rinse adhesive system, while the other thirty patients with 60 first molar teeth in Group B were treated with self-etch adhesive system. After adhesive placement, all children received the same fissure sealants in newly erupted maxillary and mandibular permanent first molar. Each group was clinically evaluated at 6 and 12 months follow-up visit. Modified United States Public Health Service (USPHS) criteria were used for direct clinical evaluation of successful outcomes such as sealant retention and marginal discoloration. RESULTS: Successful outcome was statistically significant in Group B compared to Group A (60% vs. 30% p= 0.020) at 12 months follow-up. Stratification analysis was performed with respect to age in which a successful outcome was not significant (p= 0.43) between groups for 6 to 7 years of age, while it was significant (p= 0.012) between groups in 8 to 9 years of age children. CONCLUSION: Self-etch adhesive system is better than etch-and-rinse adhesive system in terms of long-term sealant retention. In addition, the bonding procedure is simple with relatively short clinical application time therefore it would offer great benefit to clinicians in treating pediatric patients.

scholarly journals The difference between porcelain and composite resin shear bond strength in the administration of 4% and 19.81% silane

2019 ◽  
Vol 52 (1) ◽  
pp. 27
Author(s):  
Ira Widjiastuti ◽  
Dwina Rahmawati Junaedi ◽  
Ruslan Effendy
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Resin Composite ◽  
Repair Process ◽  
Direct Repair ◽  
Significant Difference ◽  
Group A ◽  
The Difference ◽  
Group B

Background: Damage to porcelain restorations such as fractures requires a repair that can be performed either directly or indirectly. Direct repair involves directly performing restoration of fractured porcelain with a composite resin application. This technique has more advantages than indirect repair because it requires no laboratory work and can be completed during a single visit. Silane, on the other hand, has been widely used and is reported to increase porcelain and composite resin attachments during the direct repair process. Purpose: This study aimed to determine the differences in shear bond strength between porcelain and composite resin during the administering of 4% and 19.81% silane. Methods: 27 porcelain samples were divided into three groups, namely: Group A - 4% silane, Group B - 19.81% silane and Group C - no silane, prior to the application of composite resin. Each sample was tested for shear bond strength by means of Autograph and fracture analysis performed through stereomicroscope and scanning electron microscope tests. Data analysis was subsequently performed using an ANOVA test. Results: There was a significant difference between the three groups with p=0.000 (p<0.005). The lowest bond strength was found in the group without silane, while the highest was in the group with 4% silane (p<0.005). Conclusion: The use of 4% silane can produce the highest shear bond strength of porcelain and resin composite.

scholarly journals Evaluation of Microtensile Bond Strength of Universal Self-etch Adhesive System to Wet and Dry Dentin

2020 ◽  
Vol 8 (D) ◽  
pp. 77-81
Author(s):  
Mohamed Ahmed Wakwak ◽  
Eslam Hassan Gabr ◽  
Ahmed Mohamed Elmarakby
Keyword(s):  
Bond Strength ◽  
Adhesive System ◽  
Solvent Free ◽  
Microtensile Bond Strength ◽  
Universal Adhesive ◽  
Significance Level ◽  
Significant Difference ◽  
One Step ◽  
Storage Times ◽  
Self Etch

BACKGROUND: The durability of dentin-resin interfaces with the universal adhesive system is a crucial characteristic with chemical interactions between the exposed collagen and the adhesive monomers, but it is still compromised with wet and dry mode. AIM: The present study evaluated the effect of dentin wetness and solvents containing of one-step self-etch adhesives on the microtensile bond strength (μTBS) of dentin at different storage times. METHODS: Occlusal dentin of 54 extracted human molars was exposed. Each adhesive agent was applied according to manufacturer instructions to wet and dry dentin surfaces. Composite resin was incrementally built up. Bond strengths to dentin were determined using the μTBS test after water storage for 24 h, 1 month, and 6 months. One-way ANOVA was used to compare between more than two non-related samples. The significance level was set at p ≤ 0.05. RESULTS: Dryness of dentin increases the μTBS with solvent-containing adhesives while decrease the μTBS with solvent-free adhesive. There was an increase in microtensile bond strength values in the case of ethanol water-based self-etch adhesive over time. No statistically significant difference was found among different storage times regarding μTBS for solvent-free adhesive, while a statistically significant difference was found among different storage times in μTBS for solvent-containing adhesives. CONCLUSION: Universal adhesive systems improve the durability and stability of dentin bond strength.

scholarly journals Comparative evaluation of bond strength of three self-adhering flowable composites to sound and demineralized enamel – An in vitro study

2021 ◽  
Vol 4 ◽  
pp. 3-7
Author(s):  
Shrikanth Benjwal ◽  
Mousumi Goswami ◽  
Aditya Saxena ◽  
Reenu Sarah Kurien ◽  
Anam Mushtaq
Keyword(s):  
Bond Strength ◽  
Primary Teeth ◽  
Fracture Pattern ◽  
Adhesive Fracture ◽  
Demineralized Enamel ◽  
Significant Difference ◽  
Group A ◽  
Mixed Fracture ◽  
Group B ◽  
Flowable Composites

Objectives: The purpose of this study was to determine bond strength of three self-adhering flowable composites. Materials and Methods: Mean tensile bond strength was measured in three groups – Group A – Constic, Group B – Dyad Flow, and Group C – Fusio Liquid Dentin on sound and demineralized primary teeth. Fracture pattern was studied using a stereomicroscope for each sample and in classified as adhesive, cohesive, or mixed fracture. Results: Mean tensile bond strength in sound enamel of Group A (Constic) was found to be 10.79 + 4.24, Group B (Dyad Flow) was 10.30 + 4.63, and of Group C (Fusio Liquid Dentine) was 11.87 + 4.45. No significant difference was found between the three groups (f = 0.327 and P = 0.724). However, a significant difference was found with demineralized enamel in three groups. Constic and Dyad Flow exhibited adhesive fracture pattern in majority of samples on sound enamel, whereas Fusio Liquid Dentin had mixed fracture pattern. On demineralized enamel, Constic exhibited adhesive fracture pattern majorly, whereas Dyad flow demonstrated mixed pattern and Fusio Liquid Dentin had more of cohesive fractures. Conclusion: Constic, Dyad Flow, and Fusio Liquid Dentin can be used instead of conventional pit and fissure sealants or in small occlusal cavities in primary teeth as a single step material.

Evaluation of the Bond Strength of Different Pulp Capping Materials to Dental Adhesive Systems: An In Vitro Study

2021 ◽  
pp. 232020682199798
Author(s):  
Sema Yazici Akbiyik ◽  
Elif Pınar Bakir ◽  
S¸eyhmus Bakir
Keyword(s):  
Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Adhesive Systems ◽  
Pulp Capping ◽  
Etch And Rinse ◽  
Significant Difference ◽  
Fracture Types ◽  
Self Etch

Aim: To evaluate the bond strengths of pulp capping materials (Dycal, ProRoot MTA, Biodentine, TheraCal LC, Calcimol LC, and ApaCal ART) and different adhesive systems (Gluma 2 Bond, Clearfil SE Protect, Gluma Self Etch, Clearfil S 3 Bond Plus, Gluma Bond Universal, Clearfil S 3 Bond Universal). Materials and Methods: Two hundred fifty-two acrylic blocks were prepared in which cylindrical cavities of 4 × 2 mm 3 were formed. Pulp capping materials were placed in the cavities. Different adhesive systems were applied to each pulp capping material group. After applying the composite resin, the shear bond strength (SBS) values of the specimens were determined in the Instron test device. Fracture types were evaluated using a stereomicroscope and a scanning electron microscope. Data were analyzed by Shapiro–Wilk’s and Kruskal–Wallis H test. Results: There is a statistically significant difference between pulp capping materials in terms of SBS values ( P < .05). Dycal’s SBS was found significantly lower than other materials, and the highest bond strength was observed in Calcimol LC material. Although there is no statistically significant difference ( P > .05) between the adhesive agent groups in terms of SBS, Gluma 2 Bond showed the highest bond strength value. Conclusion: In traditional pulp capping materials such as Dycal, MTA, and Biodentine, using a two-step self-etch adhesive system can result in higher bond strength values. In resin-based TheraCal LC,, ApaCal ART, and Calcimol LC materials, it may be recommended to use a two-step etch and rinse adhesive system.

scholarly journals Comparison between one-step self-etch adhesive and along with additional hydrophobic layer in the retention of giomer at non-carious cervical lesion

2017 ◽  
Vol 10 (3) ◽  
pp. 140
Author(s):  
Sultana Parveen ◽  
Mozammal Hossain ◽  
Md. Mujibur Rahman Howlader ◽  
Md. Abdul Hannan Sheikh ◽  
Md. Shamsul Alam ◽  
...  
Keyword(s):  
Adhesive Layer ◽  
Cervical Lesion ◽  
Cervical Lesions ◽  
Significant Difference ◽  
Group A ◽  
One Step ◽  
Maxillary Premolars ◽  
The One ◽  
Group B ◽  
Self Etch

<p>The purpose of the present study was to assess the giomer retention following application of one step self etch adhesive and one-step self-etch adhesive plus an extra hydrophobic adhesive layer in non-carious cervical lesion. Twenty four participants having bilateral cervical lesion at the maxillary premolars teeth were selected. Following cleaning of the cervical lesions, 24 left premolar teeth were restored with giomer by using the one-step self-etch system (Group A) and 24 right premolar teeth were restored with giomer by using one-step self-etching plus extra hydrophobic adhesive layer (Group B). Participants were recalled at 6 and 15 months for evaluating the clinical outcome. The results showed that at 15 months, 18 giomer restorations in Group A and 21 in Group B were intact inside the cavity and no significant difference was found between the two groups. It can be concluded that giomer restoration used with one-step self- etching plus additional adhesive layer slightly improved the retention of the material.</p>

scholarly journals Bond Durability of Adhesives Containing Modified-monomer With/Without-fluoride After Aging in Artificial Saliva and Under Intrapulpal Pressure Simulation

2013 ◽  
Vol 38 (1) ◽  
pp. 48-56 ◽  
Author(s):  
HA El-Deeb ◽  
HH Al Sherbiney ◽  
EH Mobarak
Keyword(s):  
Bond Strength ◽  
Artificial Saliva ◽  
Adhesive System ◽  
Single Step ◽  
The Other ◽  
Adhesive Systems ◽  
Etch And Rinse ◽  
Significant Difference ◽  
Self Etch ◽  
Bond Durability

SUMMARY Objective: To evaluate the dentin bond strength durability of adhesives containing modified-monomer with/without-fluoride after storage in artificial saliva and under intrapulpal pressure simulation (IPPS). Materials and Methods: The occlusal enamel of 48 freshly extracted teeth was trimmed to expose midcoronal dentin. Roots were sectioned to expose the pulp chamber and to connect the specimens to the pulpal-pressure assembly. Specimens were assigned into four groups (n=12) according to adhesive system utilized: a two-step etch-and-rinse adhesive system (SB, Adper Single Bond 2, 3M ESPE), a two-step self-etch adhesive system (CSE, Clearfil SE Bond, Kuraray Medical Inc), and two single-step self-etch adhesives with the same modified monomer (bis-acrylamide)—one with fluoride (AOF, AdheSE One F, Ivoclar-Vivadent) and the other without (AO, AdheSE One, Ivoclar-Vivadent). Bonding was carried out while the specimens were subjected to 15-mm Hg IPPS. Resin composite (Valux Plus, 3M ESPE) buildups were made. After curing, specimens were aged in artificial saliva and under 20-mm Hg IPPS at 37°C in a specially constructed incubator either for 24 hours or six months prior to testing. Bonded specimens (n=6/group) were sectioned into sticks (n=24/group) with a cross section of 0.9 ± 0.01 mm2 and subjected to microtensile bond strength (μTBS) testing using a universal testing machine. Data were statistically analyzed using two-way analysis of variance (ANOVA) with repeated measures, one-way ANOVA tests, and a t-test (p&lt;0.05). Failure modes were determined using a scanning electron microscope. Results: The μTBS values of SB and CSE fell significantly after six-month storage in artificial saliva and under IPPS, yet these values remained significantly higher than those for the other two adhesives with modified monomers. There was no significant difference in the bond strength values between fluoride-containing and fluoride-free self-etch adhesive systems (AOF and AO) after 24 hours or six months. Modes of failure were mainly adhesive and mixed. Conclusions: Based on the results of this study, 1) Fluoride addition did not affect dentin bond durability; and 2) despite the fact that the single-step adhesive system with modified monomer showed stability, bond strengths associated with these systems remained lower than those of multistep adhesive systems.

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