scholarly journals Evaluation of Adhesive Capacity of Universal Bonding Agents Used in Direct Composite Resins Repair

2017 ◽  
Vol 54 (3) ◽  
pp. 574-577 ◽  
Author(s):  
Simona Stoleriu ◽  
Sorin Andrian ◽  
Irina Nica ◽  
Andrei Victor Sandu ◽  
Galina Pancu ◽  
...  
Keyword(s):  
Hybrid Composite ◽  
Study Groups ◽  
Composite Resins ◽  
Bonding Agent ◽  
Interface Bonding ◽  
Sem Images ◽  
Bonding Agents ◽  
Etch And Rinse ◽  
Repair Procedure ◽  
Self Etch

The aims of the study were to characterise the resin-resin interface when a universal bonding agent (UBA) was used in two different strategies in direct composite repair and to evaluate the bonding capacity of UBA by microleakage assessment. In study groups a micro-filled hybrid and a nano-filled hybrid composite resins were aged in order to simulate an old restorations. As a repair material was chosen the same micro-filled hybrid composite resin that was used as an old restoration. UBA was applied in etch-and-rinse and self-etch strategies and was used as an intermediate layer in repair procedure. After the repair the samples were aged again. In control groups were included non-aged, repaired composite resins samples. The resin-resin interface was characterised on SEM images and the microleakage at the interface was evaluated by dye penetration assessment. Universal bonding agent used in direct composite resins repair showed a very good adaptation to non-aged micro-filled hybrid and nano-filled hybrid composite resins. Aging by saliva storage of repaired composite resins leaded to an enlargement of resin-resin junction and a increased microleakage irrespective of the strategy (etch-and-rinse or self -etch) used for bonding agent application. Etch-and-rinse strategy for universal bonging agent application determined a better interface bonding when compared to self -etch strategy.

Laser Therapy Evaluation in Complications of Restorations by Total-Etch Technique

2018 ◽  
Vol 69 (4) ◽  
pp. 921-925
Author(s):  
Cristina Angela Ghiorghe ◽  
Andra Claudia Gamen ◽  
Tiberiu Tirca ◽  
Sorin Andrian ◽  
Anca Melian ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Laser Therapy ◽  
Hybrid Composite ◽  
Study Groups ◽  
Composite Resins ◽  
Single Bond ◽  
Class Iii ◽  
Anterior Teeth ◽  
Carious Lesions ◽  
Etch And Rinse

The aim of this study was to evaluate the efficiency of laser therapy in post-operative sensitivity by Visual Analogue Scale (VAS) to the 57 patients after restoration with two different resins composite. In the first group (28 patients, 30 teeth) it was restored the cavity class I Black with micro-hybrid composite Filtek Z250 - Adper Single Bond (3M/ESPE). In the second group (29 patients, 30 teeth) it was restored the cavity class III Black with nano-hybrid composite Ceram X One Sphere Tec-Prime and Bond One (Etch&Rinse) (Dentsply). The restorative treatments were performed by the same practitioner on posterior and anterior teeth diagnosed with mid-sized chronic carious lesions. Total etch (etch and rinse) strategy of adhesion was used for both composite resins. The laser treatment was performed in 2 sessions at 48 hours and after 7 days, for both study groups using laser Whitening Lase II (DMC Dental). Mean scores for VAS indices decreased significantly at 48 hours and 7 days, following laser treatment for all the investigated parameters (materials, sex, age) (p [ 0.05).

Evaluation of Compressive Strength of Repaired Direct Composite Resin Restorations

2017 ◽  
Vol 68 (8) ◽  
pp. 1874-1878
Author(s):  
Sorin Andrian ◽  
Galina Pancu ◽  
Claudiu Topoliceanu ◽  
Nicoleta Tofan ◽  
Simona Stoleriu ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Hybrid Composite ◽  
Intermediate Layer ◽  
Composite Resin ◽  
Testing Machine ◽  
Composite Resins ◽  
Bonding Agent ◽  
Etch And Rinse ◽  
Composite Resin Restorations ◽  
Aged Composite

The aim of the study was to evaluate and to compare the compressive parameters of repaired composite restoration when using different types of composite resins and a universal bonding agent as an intermediate layer. Aged micro-filled hybrid and nano-filled hybrid composite resins were chosen to simulate old restoration. The same micro-filled hybrid composite resin was used as a repair material. A universal bonding agent applied in etch-and-rinse and self etch strategies was used as an intermediate layer in restoration repair. Non-aged composite resins were considered as control. Compressive strength and compressive modulus were determined by evaluating the samples in a universal testing machine. Lower values of the tested parameters were recorded after aging both types of composite resin when compared to control. Higher values of compressive strength were recorded when nano-filled hybrid composite resin was repaired when compared to micro-filled hybrid composite resin. The strategy of universal bonding agent application as an intermediate layer did not influenced the compressive properties of repaired restoration.

scholarly journals Degree of Conversion of Etch-and-Rinse and Self-etch Adhesives Light-cured Using QTH or LED

2010 ◽  
Vol 35 (6) ◽  
pp. 649-654 ◽  
Author(s):  
A. L. Faria-e-Silva ◽  
A. F. Lima ◽  
R. R. Moraes ◽  
E. Piva ◽  
L. R. Martins
Keyword(s):  
Clinical Relevance ◽  
Degree Of Conversion ◽  
Bonding Agents ◽  
Etch And Rinse ◽  
Self Etch

Clinical Relevance The effect of QTH and LED curing lights on the degree of conversion of bonding agents is material dependent.

scholarly journals Substantivity of Carbodiimide Inhibition on Dentinal Enzyme Activity over Time

2017 ◽  
Vol 96 (8) ◽  
pp. 902-908 ◽  
Author(s):  
A. Mazzoni ◽  
V. Angeloni ◽  
N. Sartori ◽  
S. Duarte ◽  
T. Maravic ◽  
...  
Keyword(s):  
Enzymatic Activities ◽  
Laser Scanning Microscopy ◽  
The Self ◽  
Bonding Agent ◽  
Fluorescence Signal ◽  
Etch And Rinse ◽  
In Situ Zymography ◽  
Self Etch ◽  
Over Time

The use of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide HCl (EDC) has recently been investigated for its effectiveness in the prevention of collagen degradation over time and the improvement of resin-dentin bond durability. The objective of the present study was to evaluate the effects of a 0.3 M EDC-containing conditioner on endogenous enzymatic activities within the hybrid layer (HL) created by a self-etch or an etch-and-rinse adhesive after 1 y. The activity within the HL was examined using in situ zymography and confocal laser scanning microscopy after 24 h or 1-y storage in artificial saliva. Dentin specimens were bonded with Clearfil SE Bond (CSE) or XP Bond (XPB). For CSE, the self-etching primer was applied and treated with 0.3 M EDC for 1 min, and then the bonding agent was applied. For XPB, dentin was etched and treated with 0.3 M EDC for 1 min and then bonded with the primer-bonding agent. Control specimens were prepared without EDC treatment. Slices containing the adhesive-dentin interface were covered with fluorescein-conjugated gelatin and observed with a multiphoton confocal microscope. Fluorescence intensity emitted by hydrolyzed fluorescein-conjugated gelatin was quantified, and the amount of gelatinolytic activity was represented by the percentage of green fluorescence emitted within the HL. After 24 h of storage, enzymatic activity was detected by in situ zymography within the HLs of both tested adhesives, with XPB higher than CSE ( P < 0.05). Almost no fluorescence signal was detected when specimens were pretreated with EDC compared to controls ( P < 0.05). After 1 y of storage, enzymatic activities significantly increased for all groups (excluding XPB control) compared to 24-h storage ( P < 0.05), with EDC pretreated specimens exhibiting significantly lower activity than controls ( P < 0.05). The present study showed, for the first time, that the use of EDC for both the self-etch and the etch-and-rinse approaches results in the reduction but not complete inhibition of matrix-bound collagenolytic enzyme activities over time in the HL.

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.

scholarly journals Self etch adhesives - An update

2020 ◽  
Vol 11 (SPL3) ◽  
pp. 464-468
Author(s):  
Nishanthana Murali ◽  
Balaji Ganesh S ◽  
Anitha Roy
Keyword(s):  
Clinical Application ◽  
Mixed Layer ◽  
Bonding Agent ◽  
Advantages And Disadvantages ◽  
Acid Type ◽  
Etch And Rinse ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
One Step ◽  
Self Etch

Self etch adhesives are one of the most recent advancements the field of dentistry has seen recently. Adhesive frameworks today are either an "etch and rinse or total etch" or "self-etch" approach, which contrast by the way they interact with the tooth structures. Total etch frameworks include phosphoric etchants to pretreat the dental hard tissues before the ensuing use of a bonding agent. Self-etch type of adhesives are generally consisting of acid type monomers, that perform the actions of etching and rinsing the tooth structures at the same time. The former type of total etch adhesives are consistent with step frameworks, contingent upon the primer and bonding agent being independent or joined in a solitary container. Thus, self etch systems seem to be easily accessible as they are a couple of phase framework. Both the framework systems structure a mixed layer because the resin is infiltrating the permeable dentin or enamel. In spite of current patterns leaning in the direction of less straightforward clinical application steps, one-step holding frameworks seem to have lower bonding qualities and appear to be less foreseeable than multi-step etch and rinse, or self etch systems. They have a variety of advantages and disadvantages which are discussed in this article. They are more popular nowadays, and this review also includes its advantages over the etch and rinse system and as well as its disadvantages compared to the etch and rinse system. It also includes the types of self etch adhesives based on the steps and range of acidity as well as some of its properties.

scholarly journals Composite resin repairs: What is the most effective protocol?

2017 ◽  
Vol 20 (1) ◽  
pp. 99
Author(s):  
Alessandra Pereira Andrade ◽  
Angela Mayumi Shimaoka ◽  
Rubens Corte Real de Carvalho
Keyword(s):  
Bond Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Composite Resin ◽  
Surface Treatments ◽  
Bonding Agent ◽  
Etch And Rinse ◽  
Silane Coupling ◽  
One Step ◽  
Self Etch

Objective: The objective of this study was to evaluate the combination effect of surface treatments and bonding agents on bond strength of repairs on aged composite resin. Materials and Methods: One hundred twenty microhybrid composite units (Filtek Z250) aged in distilled at 37ºC water for six months were submitted to different surface treatment prior to resin repairs. Ten specimens were randomly divided into 12 groups: non-treated/no bonding agent (negative control), sandblasting /no bonding agent, silane/no bonding agent, non-treated/ etch-and-rinse; non-treated/one-step self-etch; non-treated/ two-step self-etch; sandblasting/etch-and-rinse; sandblasting/one-step self-etch; sandblasting/two-step self-etch; silane coupling agent/etch-and-rinse; silane coupling agent/ one-step self-etch; silane coupling agent/two-step self-etch. Microshear testing was performed to bond strength assessment. Results: Two-way ANOVA and Tukey’s test (α=0.05) demonstrated significant difference between the surface treatments and adhesive systems. Only no treated surface/etch-and-rinse group showed lower bond strength values when compared to other groups. Conclusion: The considered surface treatments were capable to increase the effectiveness of the repair in composite resin when using the adhesive etch-and-rinse.

scholarly journals The Use of Mouse Models to Investigate Shear Bond Strength in Amelogenesis Imperfecta

2011 ◽  
Vol 90 (11) ◽  
pp. 1352-1357 ◽  
Author(s):  
M.K. Pugach ◽  
F. Ozer ◽  
Y. Li ◽  
K. Sheth ◽  
R. Beasley ◽  
...  
Keyword(s):  
Bond Strength ◽  
Mouse Models ◽  
Shear Bond Strength ◽  
Amelogenesis Imperfecta ◽  
Success Rates ◽  
Sem Images ◽  
Knock Out ◽  
Etch And Rinse ◽  
Variable Success ◽  
Self Etch

Patients with amelogenesis imperfecta (AI) have defective enamel; therefore, bonded restorations of patients with AI have variable success rates. To distinguish which cases of AI may have good clinical outcomes with bonded materials, we evaluated etching characteristics and bond strength of enamel in mouse models, comparing wild-type (WT) with those having mutations in amelogenin (Amelx) and matrix metalloproteinase-20 (Mmp20), which mimic 2 forms of human AI. Etched enamel surfaces were compared for roughness by scanning electron microscopy (SEM) images. Bonding was compared through shear bond strength (SBS) studies with 2 different systems (etch-and-rinse and self-etch). Etched enamel surfaces of incisors from Amelx knock-out ( AmelxKO) mice appeared randomly organized and non-uniform compared with WT. Etching of Mmp20KO surfaces left little enamel, and the etching pattern was indistinguishable from unetched surfaces. SBS results were significantly different when AmelxKO and Mmp20KO enamel surfaces were compared. A significant increase in SBS was measured for all samples when the self-etch system was compared with the etch-and-rinse system. We have developed a novel system for testing shear bond strength of mouse incisors with AI variants, and analysis of these data may have important clinical implications for the treatment of patients with AI.

Effect of Silver Diamine Fluoride on Microtensile Bond Strength to Dentin

2012 ◽  
Vol 37 (6) ◽  
pp. 610-616 ◽  
Author(s):  
RL Quock ◽  
JA Barros ◽  
SW Yang ◽  
SA Patel
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Bonding Agent ◽  
Microtensile Bond Strength ◽  
Silver Diamine Fluoride ◽  
Microtensile Testing ◽  
Etch And Rinse ◽  
Significant Difference ◽  
Diamond Saw ◽  
Self Etch

SUMMARY The aim of this in vitro study was to investigate the effect of the cariostatic and preventive agent silver diamine fluoride (SDF) on the microtensile bond strength of resin composite to dentin. Forty-two caries-free, extracted molars were flattened occlusally and apically using a diamond saw, and the exposed occlusal dentin was polished with a series of silicon carbide papers, all under water irrigation. The teeth were then randomly divided into six groups of seven teeth each that were treated as follows: 1) Peak SE self-etch bonding agent; 2) 12% SDF + Peak SE; 3) 38% SDF + Peak SE; 4) Peak LC etch-and-rinse bonding agent; 5) 12% SDF + Peak LC; and 6) 38% SDF + Peak LC. Four-millimeter buildups of Amelogen Plus were incrementally placed on all teeth; after a 24-hour storage period in distilled water, the specimens were sectioned perpendicular to the adhesive interface to produce beams of cross-sectional surface area measuring approximately 1 mm2. The beams were placed on a microtensile testing machine, which utilized a single-speed pump motor and force gauge at 20 kgf × 0.01 second to record maximum tensile force before failure occurred. Two-way analysis of variance and post hoc Tukey tests were performed to compare the effects of the SDF on microtensile bond strength, with statistical significance set at α = 0.05. None of the experimental groups treated with different concentrations of SDF showed a significant difference in bond strength compared to the control groups, and there was no significant difference in bond strength between self-etch and etch-and-rinse groups. However, the effect of SDF on self-etch bonded teeth compared to etch-and-rinse bonded teeth was statistically significant (p=0.0363), specifically at the 12% concentration. SDF does not adversely affect the bond strength of resin composite to noncarious dentin.

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