scholarly journals Resistance to Dislodgement of REBILDA® Post System to Intraradicular Dentin

2017 ◽  
Vol 19 (2) ◽  
pp. 47
Author(s):  
Daphne Ross DDS ◽  
Carlos E. Filloy Esna DDS ◽  
Juan Carlos Ramírez-Barrantes DDS, MSD, PhD
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Adhesive Systems ◽  
Root Reinforcement ◽  
Significant Difference ◽  
Group 2 ◽  
Push Out ◽  
Scanning Electron ◽  
Group 1

Currently there is controversy in the literature about clinical and adhesive effectiveness with respect to adhesive systems aimed to  root reinforcement. Thus, the objective of this study was to evaluate the Push-Out bond strength between the Rebilda® post system and the intraradicular dentine. Thus, 28 unirradicular teeth were used, cut and standardized in 16 mm. The root segments were submitted to endodontic treatment; and then randomly divided into two groups, Group 1 (n = 14): Rebilda® DC + Futurabond DC; Group 2 (n = 14): RelyX ARC + Adper Scothbond Multipurpose Plus. Ten specimens from each group were submitted  to the Push-Out Test. The remaining 4 specimens from each group were prepared for Scanning Electron Microscopy (SEM) in order to evaluate the formation of resinous extensions at the post-cement-dentin interface. Group 2 showed better results when compared to Group 1 regarding bond strength and in formation of resinous extensions or tags, but there was no statistically significant difference (p>0.05). It was concluded that the REBILDA® Post System promotes adequate bond strength to intraradicular dentin.

scholarly journals Scanning Electron Microscopy Analysis of the Anterior Capsulotomy Edge: A Comparative Study between Femtosecond Laser-Assisted Capsulotomy and Manual Capsulorhexis

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Daniele Tognetto ◽  
Chiara De Giacinto ◽  
Alberto Armando Perrotta ◽  
Tommaso Candian ◽  
Alessandro Bova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Femtosecond Laser ◽  
Comparative Study ◽  
Surface Irregularity ◽  
Significant Difference ◽  
Group 2 ◽  
Cut Surface ◽  
Scanning Electron ◽  
Group 1

Purpose. To compare the capsule edges ultrastructure obtained by two femtosecond laser-assisted cataract surgery (FLACS) platforms and manual continuous curvilinear capsulorhexis (CCC) using scanning electron microscopy (SEM). Setting. Eye Clinic, University of Trieste, Italy. Design. Experimental comparative study. Methods. 150 anterior capsules were collected and divided into three groups as follows: Group 1 (50 capsules) obtained with manual CCC, Groups 2 and 3 (each with 50 capsules) obtained with the Catalys Laser and the LenSx Laser, respectively. All samples were imaged by means of SEM and regularity of the cut surface, and thickness of the capsule edge were evaluated and compared. Results. All femtosecond laser (FSL) capsules were perfectly circular, whereas some alteration of the circular shape was observed in the manual ones. Group 1 showed a smooth and regular capsule edge without any surface irregularity, conversely Groups 2 and 3 showed postage-stamp perforations on the capsule edge. The cut surface irregularity value in Group 2 was 1.4 ± 0.63, while it was 0.7 ± 0.49 in Group 3 (p<0.05). Group 1 had a significantly lower thickness of the capsule edge than the FSL groups (p<0.05). No statistically significant difference in the capsule edge thickness between the FSL groups was found (p=0.244). Conclusions. Despite the presence of slight cut surface irregularities, both FSL capsulotomies showed a better geometry and circularity than the manual ones. Capsulotomy specimens obtained using both FSL capsulotomies showed laser-induced alterations of the capsule edge when compared with smooth and regular edges obtained using manual CCC.

scholarly journals Effect of Bleaching and Ca(OH)2 Dressing on the Bond Strength of Fiberglass Posts to Root Dentine

2019 ◽  
Vol 13 (03) ◽  
pp. 335-342
Author(s):  
Iane Souza Nery-Silva ◽  
Gabriela Rover ◽  
Maybell Tedesco ◽  
Lucas da Fonseca Roberti Garcia ◽  
Eduardo Antunes Bortoluzzi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Failure Modes ◽  
Root Canal Filling ◽  
Multiple Comparison Test ◽  
Significant Difference ◽  
Frequent Failure ◽  
Push Out ◽  
Scanning Electron

Abstract Objective The purpose of this study was to evaluate the effect of the intracoronary bleaching and calcium hydroxide (Ca(OH)2) dressing use, on the bond strength (BS) of fiberglass posts to root dentine. Materials and Methods After root canal filling of 40 bovine incisors, a 2-mm thick cervical plug was fabricated 2 mm below the cementum–enamel junction. Seven days later, teeth were randomly distributed into four groups (n = 10), as follows: G1 no bleaching, followed by immediate post cementation; G2 bleaching and immediate post cementation; G3 bleaching, dressing with Ca(OH)2 for 7 days, and post cementation; and G4 bleaching, no dressing, and post cementation after 7 days. The roots were transversally cut into 1-mm thick slices to perform the push-out test (0.5 mm/min). Failure modes were assessed under scanning electron microscopy. Statistical Analysis The analysis of variance (two-way ANOVA) was performed, followed by the supplementary Tukey multiple comparison test (a = 5%). Results No significant difference for BS was observed among groups. Considering the different root thirds, G1 had higher BS values for the cervical third in comparison with the apical one (p < 0.05). The most frequent failure modes were adhesive between cement/dentine (G1); cohesive at the post (G2 and G3), and mixed (G4). Conclusions The BS of the fiberglass posts to root dentine was not affected by the intracoronary bleaching and the use of Ca(OH)2 dressing.

scholarly journals Efficacy of Two Irrigants Used with Self-Adjusting File System on Smear Layer: A Scanning Electron Microscopy Study

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Özgür Genç Şen ◽  
Sadullah Kaya ◽  
Özgür Er ◽  
Tayfun Alaçam
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Citric Acid ◽  
Evaluation System ◽  
Smear Layer ◽  
Root Canals ◽  
Significant Difference ◽  
Group 2 ◽  
Scanning Electron ◽  
Group 1

Mechanical instrumentation of root canals produces a smear layer that adversely affects the root canal seal. The aim of this study was to evaluate efficacy of MTAD and citric acid solutions used with self-adjusting file (SAF) system on smear layer. Twenty-three single-rooted human teeth were used for the study. Canals were instrumented manually up to a number 20 K file size. SAF was used to prepare the root canals. The following groups were studied: Group 1: MTAD + 5.25% NaOCl, Group 2: 20% citric acid + 5.25% NaOCl, and Group 3: Control (5.25% NaOCl). All roots were split longitudinally and subjected to scanning electron microscopy. The presence of smear layer in the coronal, middle, and apical thirds was evaluated using a five-score evaluation system. Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis. In the coronal third, Group 2 exhibited the best results and was statistically different froms the other groups (P<0.05). There was not a significant difference among the three thirds of groups according to in-group comparisons (P>0.05). The solutions used in Group 1 and 2 could effectively remove smear layer in most of the specimens. However, citric acid was more effective than MTAD in the three thirds of the canal.

scholarly journals Evaluation of surface roughness and push-out bond strength of glass fiber post with and without surface pretreatments: A scanning electron microscopy study

Endodontology ◽  
2021 ◽  
Vol 33 (2) ◽  
pp. 62
Author(s):  
RathnaPiriyanga Subramani ◽  
Rajasekaran Meenakshisundaram ◽  
Anilkumar Ramachandran ◽  
KarumaranChellaswamy Savarimalai
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Roughness ◽  
Bond Strength ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Fiber Post ◽  
Glass Fiber Post ◽  
Push Out ◽  
Scanning Electron

scholarly journals Antibacterial and Bonding Properties of Universal Adhesive Dental Polymers Doped with Pyrogallol

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1538
Author(s):  
Naji Kharouf ◽  
Ammar Eid ◽  
Louis Hardan ◽  
Rim Bourgi ◽  
Youri Arntz ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Antibacterial Activity ◽  
Bond Strength ◽  
The Other ◽  
Adhesive Systems ◽  
Universal Adhesive ◽  
Bonding Properties ◽  
Morphological Differences ◽  
Scanning Electron

This study investigated the antibacterial activity, bond strength to dentin (SBS), and ultra-morphology of the polymer–dentin interface of experimental adhesive systems doped with pyrogallol (PY), which is a ubiquitous phenolic moiety that is present in flavonoids and polyphenols. A universal adhesive containing 4-META and 10-MDP was used in this study. PY behaves as an antioxidant and anti-cancerogenic agent and it was incorporated into the adhesive at different concentrations (0.5 and 1 wt.%). The antibacterial activity and SBS were analyzed and the results were statistically analyzed. The ultra-morphology of the polymer–dentin interface was assessed using scanning electron microscopy (SEM). At 24 h, a lower antibacterial activity was observed for the control adhesive compared to those with 0.5% and 1% PY. No difference was seen in SBS between the three groups at 24 h. After 6 months, the SBS of the 0.5% PY adhesive was significantly lower than the other tested adhesives. The specimens created with 1% PY adhesive presented a higher bond strength at six months compared with that found at 24 h. No morphological differences were found at the polymer–dentin interfaces of the tested adhesives. Pyrogallol may be incorporated into modern universal adhesive systems to preserve the polymer–dentin bonding interface and confer a certain degree of antibacterial activity.

Scanning electron microscopy evaluation of the effect of etching agents on human enamel surface

2006 ◽  
Vol 30 (3) ◽  
pp. 247-250 ◽  
Author(s):  
Caio Zanet ◽  
Victor Arana-Chavez ◽  
Marcelo Fava
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Phosphoric Acid ◽  
Enamel Surface ◽  
Human Enamel ◽  
Group 3 ◽  
Group 2 ◽  
Scanning Electron ◽  
Adhesive Materials ◽  
Group 1

Acid etching promotes microporosities on enamel surface, which provide a better bonding surface to adhesive materials. The purpose of this study was to comparatively analyze the microstructure of enamel surface after etching with 37% phosphoric acid or with two self-etching primers, Non-rinse conditioner (NRC) and Clearfil SE Bond (CSEB) using scanning electron microscopy. Thirty sound premolars were divided into 3 groups with ten teeth each: Group 1: the buccal surface was etched with 37% phosphoric acid for 15 seconds; Group 2: the buccal surface was etched with NRC for 20 seconds; Group 3: the buccal surface was etched with CSEB for 20 seconds. Teeth from Group 1 were rinsed with water; teeth from all groups were air-dried for 15 seconds. After that, all specimens were processed for scanning electron microscopy and analyzed in a Jeol 6100 SEM. The results showed deeper etching when the enamel surface was etched with 37% phosphoric acid, followed by NRC and CSEB. It is concluded that 37% phosphoric acid is still the best agent for a most effective enamel etching.

Bonding performance of different adhesive systems to deproteinized dentin: Microtensile bond strength and scanning electron microscopy

2005 ◽  
Vol 75B (1) ◽  
pp. 158-167 ◽  
Author(s):  
Fábio Barbosa de Souza ◽  
Cláudio Heliomar Vicente Silva ◽  
Regina Guenka Palma Dibb ◽  
Carina Sincler Delfino ◽  
Lúcia Carneiro de Souza Beatrice
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Adhesive Systems ◽  
Microtensile Bond Strength ◽  
Bonding Performance ◽  
Scanning Electron

scholarly journals Comparison of two adhesive systems of various polyetheretherketone (PEEK) composites on the shear bond strength

2021 ◽  
Vol 11 (2) ◽  
pp. 54-61
Author(s):  
Fatih Demirci ◽  
Samet Tekin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Surface Properties ◽  
Shear Bond Strength ◽  
Failure Modes ◽  
Testing Machine ◽  
Fiber Reinforced ◽  
Adhesive Systems ◽  
Scanning Electron

Aim: In this in vitro study, the effect of two adhesive systems applied to surfaces of different polyether-ether-ketone (PEEK) composites on the shear bond strength (SBS) of a composite resin was compared. Methodology: Eighty PEEK specimens were divided into four groups (n=20): Unfilled PEEK (UF), carbon-fiber-reinforced PEEK (CFR), glass-fiber-reinforced PEEK (GFR), and ceramic-reinforced PEEK (CR). Each group was further divided into two subgroups (n=10): Visio.link (VL) and Single Bond Universal (SB). The specimens with 8-mm diameter and 5-mm thickness were prepared. SBS was examined using a universal testing machine. Results were statistically analyzed by multivariate analysis of variance and Tukey’s post-hoc test. Failure modes were analyzed using a stereomicroscope at 20× magnification. Surface properties were examined by scanning electron microscopy. The surface properties of the specimens were examined by scanning electron microscopy (SEM).  Results: Effect of different PEEK and adhesive systems on SBS was found to be statistically significant (p<0.05). SBS values for CFR-VL and UF-VL groups were statistically more significant than those for CFR-SB and UF-SB groups (p=0.001). SBS values for the GFR-VL group were statistically more significant than that for the UF-VL group (p=0.001). SBS values for the CF-SB group were statistically more significant than those for CFR-SB and CFR-SB groups (p=0.001). Failure modes were examined using a stereomicroscope at 20× magnification, and adhesive and mixed failure modes were observed. Conclusion: PEEK composites with different contents and properties can be used in fixed prosthetic restorations. However, additional experimental and clinical studies are required to investigate different PEEK frameworks and composite veneers.   How to cite this article: Demirci F, Tekin S. Comparison of two adhesive systems of various polyetheretherketone (PEEK) composites on the shear bond strength. Int Dent Res 2021;11(2):54-61. https://doi.org/10.5577/intdentres.2021.vol11.no2.1   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals EFFECTS OF COLD LATERAL VERSUS WARM VERTICAL COMPACTION OBTURATION ON THE PUSH-OUT BOND STRENGTH OF BIOROOT™, A CALCIUM SILICATE-BASED SEALER

2020 ◽  
pp. 77-79
Author(s):  
ANDARI PUTRIANTI ◽  
MUNYATI USMAN ◽  
KAMIZAR NAZAR ◽  
RATNA MEIDYAWATI ◽  
ENDANG SUPRASTIWI ◽  
...  
Keyword(s):  
Bond Strength ◽  
Calcium Silicate ◽  
Testing Machine ◽  
Root Canals ◽  
Universal Testing ◽  
Significant Difference ◽  
Group 2 ◽  
Warm Vertical Compaction ◽  
Push Out ◽  
Group 1

Objective: BioRoot™ , which contains pure calcium silicate, is used in cold lateral compaction. However, hydroxyl ions are still released when BioRoot™is used in warm vertical compaction. This study compared the effects of cold and warm vertical compaction obturation on the push-out bond strengthof BioRoot™.Methods: Specimens from 16 root canals instrumented with ProTaper Next X5 50/06 were divided into two groups (n=16 specimens per group).Group 1 was obturated using cold lateral compaction, whereas Group 2 was obturated using warm vertical compaction. All samples were incubatedfor 48 h (37°C, 100% humidity) and embedded into an acrylic block. Starting at 7 mm from the apex, two 2-mm-thick slices of each sample were cut.Dislodgement resistance was measured using a universal testing machine, and the push-out bond strength was calculated.Results: There was a significant difference in the push-out bond strength value between cold (4.5–41.1 MPa) and warm (4.12–24.25 MPa) compactionobturation (p<0.05).Conclusion: Cold lateral compaction provides better adhesion capability than warm vertical compaction in root canal obturation.

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