scholarly journals Effects of Smear Layer and Surface Moisture on Dentin Bond Strength of a Waterless All-in-one Adhesive

2006 ◽  
Vol 25 (2) ◽  
pp. 332-338 ◽  
Author(s):  
Ayuko UMINO ◽  
Toru NIKAIDO ◽  
Shamim SULTANA ◽  
Miwako OGATA ◽  
Junji TAGAMI
Keyword(s):  
Bond Strength ◽  
Smear Layer ◽  
Surface Moisture

An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser

2013 ◽  
Vol 14 (2) ◽  
pp. 183-187 ◽  
Author(s):  
G Anil Kumar ◽  
Maneesha Das ◽  
Sindhu Ramesh ◽  
Surendranath Garapati
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Smear Layer ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Group Iii ◽  
Group I ◽  
Ah Plus

ABSTRACT Background Smear layer is a negative factor which prevents adhesion of the filling material to the dentinal walls. Recent advances in dental research have incorporated lasers as a potential adjunct in root canal treatment by removing the smear layer before filling the root canal system, enhancing the adhesion of sealers to dentin and improving the sealing ability. Aim To evaluate the microtensile bond strength of AH-Plus resin-based sealer to dentin after treatment with 980 nm diode and 1,064 nm neodymium-doped:yttrium aluminum garnet (Nd:YAG) laser in vitro. Materials and methods Thirty specimens prepared for three groups namely group I (control), group II (980 nm diode–lased specimens) and group III (Nd:YAG–lased specimens). One tooth from each group was observed under scanning electron microscope for evaluation of intracanal root dentin morphology. Remaining specimens were used for making microsections by hard tissue microtome. Specimens for groups II and III were lased with 980 nm diode and 1,064 nm Nd:YAG laser. AH Plus sealer was applied onto specimens and mounted onto Instron universal testing machine for microtensile bond strength testing. Results were subjected to statistical analysis using one-way analysis of variance (ANOVA) and Tukey's test. Results Group III Nd:YAG had maximum mean microtensile bond strength values (11.558 ± 0.869), followed by group II diode (9.073 ± 0.468) and group I control (6.05 ± 0.036). Statistically significant differences were seen among all the groups. SEM analysis shows removal of smear layer in both groups II and III. Conclusion Both Nd:YAG and diode laser were more effective than control group in improving the microtensile bond strength of AH Plus sealer to dentin. Clinical significance Lasers have the potential to increase the adhesiveness of root canal sealer to dentin surface, thereby improving the quality of root canal obturation. How to cite this article Maneesha D, Anil KG, Sindhu R, Surendranath G, Deepak S. An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser. J Contemp Dent Pract 2013;14(2): 183-187.

scholarly journals Influence of surface moisture condition on the bond strength to dentin of etch-and-rinse adhesive systems

2014 ◽  
Vol 13 (3) ◽  
pp. 182-186 ◽  
Author(s):  
Eliseu Aldrighi Münchow ◽  
Lisia Lorea Valente ◽  
Mayara Bossardi ◽  
Tanize Cezar Priebe ◽  
Cesar Henrique Zanchi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Adhesive Systems ◽  
Moisture Condition ◽  
Surface Moisture ◽  
Etch And Rinse

Effect of Smear Layers Created by Different Burs on Durability of Self-Etching Adhesive Bond to Dentin of Primary Teeth

2015 ◽  
Vol 39 (3) ◽  
pp. 224-230 ◽  
Author(s):  
P Rirattanapong ◽  
P Senawongse ◽  
C Harnirattisal ◽  
W Wunsiw
Keyword(s):  
Bond Strength ◽  
High Speed ◽  
Failure Modes ◽  
Resin Composite ◽  
Testing Machine ◽  
Smear Layer ◽  
Hybrid Layer ◽  
Diamond Bur ◽  
Storage Times ◽  
Over Time

Aim: The aim of this study was to evaluate the effects of a smear layer generated by a high-speed diamond or carbide bur on the durability of microtensile bond strength (μTBS) of a self-etching adhesive to primary dentin. Study Design: Flat occlusal dentin surfaces of 105 human primary molars were exposed using 600 grit silicon carbide paper before being divided into 2 groups for further grinding with either a highspeed diamond or carbide bur. Ten prepared dentin surfaces treated by each bur were evaluated for the characteristics of the smear layer using a scanning electron microscope (SEM). Seventy-five specimens from each bur-prepared group were applied with a 2-step self-etching adhesive (Clearfil SE Bond®) then built up with a resin composite. Each bonded specimen was sectioned into a 1-mm thick slab and trimmed to a dumbbell shape with a cross-sectional area of approximately 1 mm2. All slabs were divided into 3 groups (n=25) according to 3 storage times of 24 hrs, 3 months, and 6 months, in distilled water at 37°C. After storage, the μTBS was determined using a universal testing machine. All fracture specimens were prepared for observation of failure modes. Ten bonded specimens of each bur group were prepared for observation of the resin-dentin interface using an SEM. Smear-layer thickness, μTBS, and failure mode distributions were statistically analyzed. Results: The high speed carbide bur created a significantly thinner smear layer than the diamond bur (p < 0.05). Dentin surfaces treated with a high-speed carbide bur generally obtained significantly higher μTBS than the diamond bur group (p < 0.05). The μTBS gradually decreased over time such that specimens stored for 6 months had significantly lower bond strength than those stored for 24 hrs (p < 0.05). Self-etching adhesive created a hybrid layer of the same thickness when prepared with either a carbide bur or diamond bur, but the carbide bur group had longer and more resin tags. Conclusion: Highspeed carbide bur groups had a higher μTBS than diamond bur groups for all storage times, and bond strengths decreased over time in both substrate groups. The use of a carbide bur produced a thinner smear layer and therefore is recommended when using this 2-step self-etching adhesive to bond the resin composite to primary dentin.

Influence of ultrasonic activation using different final irrigants on antimicrobial activity, smear layer removal and bond strength of filling material

2018 ◽  
Vol 45 (2) ◽  
pp. 209-215 ◽  
Author(s):  
Matheus Albino Souza ◽  
Igor Paim Hoffmann ◽  
Vitor Hugo Sanches Menchik ◽  
Julia Zandoná ◽  
Caroline Tumelero Dias ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Bond Strength ◽  
Smear Layer ◽  
Filling Material ◽  
Ultrasonic Activation ◽  
Layer Removal

scholarly journals Influence of thicknesses of smear layer on the transdentinal cytotoxicity and bond strength of a resin-modified glass-ionomer cement

2012 ◽  
Vol 23 (4) ◽  
pp. 379-386 ◽  
Author(s):  
Adriano Augusto Melo de Mendonça ◽  
Camila Fávero de Oliveira ◽  
Josimeri Hebling ◽  
Carlos Alberto de Souza Costa
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Cell Metabolism ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Smear Layer ◽  
Glass Ionomer ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

This study evaluated the transdentinal cytotoxicity (TC) and the bond strength (BS) of a resin-modified glass-ionomer cement (RMGIC) applied to dentin covered with smear layer (SL) of different thicknesses. Forty dentin discs had thick (TSL) or thin (THSL) smear layer created on their occlusal side. In artificial pulp chambers, MDPC-23 cells were seeded on the pulpal side of the dentin discs and divided into five groups: G1TC: no treatment (control); G2TC: TSL + RMGIC; G3TC: THSL + RMGIC; G4TC: TSL removal + RMGIC; G5TC: THSL removal + RMGIC. After 24 h, cell metabolism and morphology were evaluated by the methyltetrazolium (MTT) assay and by scanning electron microscopy (SEM), respectively. For BS, the following groups were determined: G1BS: TSL removal + RMGIC; G2BS: THSL removal + RMGIC; G3BS: TSL + RMGIC; G4BS: THSL + RMGIC. Shear bond strength was tested to failure in a mechanical testing machine MTS (0.5 mm/min). Statistically significant difference was observed only between the control and experimental groups (Kruskal-Wallis, p<0.05). The metabolic activity of the viable MDPC-23 cells in G2TC, G3TC, G4TC and G5TC decreased by 54.85%, 60.79%, 64.12% and 62.51%, respectively. Mean shear bond strength values for G1BS, G2BS, G3BS and G4BS were 7.5, 7.4, 6.4 and 6.7 MPa, respectively, without significant difference among them (ANOVA, p>0.05). RMGIC presented moderate transdentinal cytotoxic effects. Maintenance or removal of smear layer did not affect the bond strength of RMGIC to dentin substrate.

Effect of phytic acid used as etchant on bond strength, smear layer, and pulpal cells

2013 ◽  
Vol 121 (5) ◽  
pp. 482-487 ◽  
Author(s):  
Mohannad Nassar ◽  
Noriko Hiraishi ◽  
Md. Sofiqul Islam ◽  
Mamoru Aizawa ◽  
Yukihiko Tamura ◽  
...  
Keyword(s):  
Bond Strength ◽  
Phytic Acid ◽  
Smear Layer

The effect of two smear layer cleansers on shear bond strength to dentin

1990 ◽  
Vol 6 (1) ◽  
pp. 1-4 ◽  
Author(s):  
S.L. Wendt ◽  
C.A. Jebeles ◽  
K.F. Leinfelder
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Smear Layer
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