Effect of hydration variability on hybrid layer properties of a self-etching versus an acid-etching system

Biomaterials ◽  
2005 ◽  
Vol 26 (9) ◽  
pp. 1011-1018 ◽  
Author(s):  
Karen A. Schulze ◽  
Sofia A. Oliveira ◽  
Robert S. Wilson ◽  
Stuart A. Gansky ◽  
Grayson W. Marshall ◽  
...  
Keyword(s):  
Acid Etching ◽  
Hybrid Layer ◽  
Etching System

Limited Decalcification/Diffusion of Self-adhesive Cements into Dentin

2008 ◽  
Vol 87 (10) ◽  
pp. 974-979 ◽  
Author(s):  
F. Monticelli ◽  
R. Osorio ◽  
C. Mazzitelli ◽  
M. Ferrari ◽  
M. Toledano
Keyword(s):  
Staining Technique ◽  
Resin Cement ◽  
Acid Etching ◽  
Hybrid Layer ◽  
Etch And Rinse ◽  
Pre Treatment ◽  
Composite Cylinders ◽  
Interfacial Characteristics ◽  
Etching System ◽  
Scanning Electron

Resin cement diffusion into dentin may differ as a function of the pre-treatment regimen. Since self-adhesive cements do not require substrate pre-treatment for luting, penetration of and interaction with the underlying dentin are questioned. We hypothesized that differences in the resin cement diffusion into dentin may exist among current commercial adhesive cements. Composite cylinders were luted on mid-coronal dentinal surfaces by an etch-and-rinse cement (Calibra), a self-etching system (Panavia F 2.0), and 4 self-adhesive cements (Multilink Sprint, Rely X Unicem, G-Cem, Bis-Cem). Dentin/cement interfacial characteristics were analyzed by a staining technique (Masson’s trichrome) and by scanning electron microscopy. Conventional acid etching resulted in partially infiltrated adhesive interfaces differing from those achieved with the application of self-etching primer. No hybrid layer and/or resin tag formation was detectable at the interfaces bonded with self-adhesive cements. Limited decalcification/infiltration was observed for self-adhesive cements into the underlying dentin. Self-adhesive cements were not able to demineralize/dissolve the smear layer completely.

Effect of Cyclic Loading on the Microtensile Bond Strengths of Total-etch and Self-etch Adhesives

2006 ◽  
Vol 31 (1) ◽  
pp. 25-32 ◽  
Author(s):  
M. Toledano ◽  
R. Osorio ◽  
A. Albaladejo ◽  
F. S. Aguilera ◽  
F. R. Tay ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Clinical Relevance ◽  
Acid Etching ◽  
One Step ◽  
Bond Strengths ◽  
Self Etch ◽  
Etching System ◽  
Better Than

Clinical Relevance Resin-dentin bonds, which may have an influence on the long-term success of restorations, are prone to deterioration after cyclic loading. The tested one-step self-etching system (Etch&Prime 3.0) provided the least reliable dentin adhesion. After acid etching of dentin, alcohol/based adhesives performed better than those containing acetone as solvent.

SEM Analysis of Hybrid Layer and Bonding Interface After Chlorhexidine Use

2012 ◽  
Vol 37 (2) ◽  
pp. 172-180 ◽  
Author(s):  
D Lafuente
Keyword(s):  
Matrix Metalloproteinase ◽  
Clinical Relevance ◽  
Sem Analysis ◽  
Collagen Fibrils ◽  
Bonding Interface ◽  
Acid Etching ◽  
Hybrid Layer ◽  
Over Time

Clinical Relevance More studies suggest that the bond between composite and dentin degrades over time because of the action of matrix metalloproteinase on collagen fibrils left unprotected by acid etching. Clinical actions should be taken to prevent this from happening and thus the failure of what should be a very long-term restoration.

scholarly journals Microtensile and Microshear Bond Strength of an Antibacterial Self-Etching System to Primary Tooth Dentin

2008 ◽  
Vol 02 (01) ◽  
pp. 11-17 ◽  
Author(s):  
Sibel Yıldırım ◽  
Gül Tosun ◽  
Alp Erdin Koyutürk ◽  
Yaḡmur Ṣener ◽  
Abdulkadir Ṣengün ◽  
...  
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Sem Analysis ◽  
Primary Tooth ◽  
Hybrid Layer ◽  
Cross Sectional ◽  
Bonding System ◽  
Cyanoacrylate Adhesive ◽  
Microshear Bond Strength ◽  
Etching System

ABSTRACTObjectives: The aim of this study was to test the hypothesis that the bonding ability of antibacterial bonding system to primary dentin was not different from the parental material which did not contain any antibacterial component.Methods: Extracted human non-carious primary molars were ground to expose the coronal dentin, and then randomly divided into two experimental groups: treatment with Clearfil Protect Bond or with Clearfil SE Bond (Kuraray Medical Inc.). Composite-dentin sticks with a cross-sectional area of approximately 0.90 mm2 were prepared and subsequently subjected to microtensile bond strength (μTBS) and microshear bond strength (μSBS) tests. For the μTBS tests, specimens were attached to an Instron testing machine with a cyanoacrylate adhesive. For μSBS testing, the sticks were mechanically fixed to the μSBS testing apparatus. The bonds were stressed in shear or tension at a crosshead speed of 1mm/min until failure occurred. Resin-dentin interfaces produced by each system were examined using SEM. The data were analyzed with Mann-Whitney’s U test.Results: The μTBS and μSBS of Clearfil Protect Bond were 30.69±9.71 and 9.94±3.78 MPa, respectively. Clearfil SE Bond showed significantly greater values of 37.31±9.57 and 12.83±3.15 MPa, respectively. SEM analysis demonstrated similar micro-morphological features including the thickness of the hybrid layer for both materials.Conclusions: It was showed that antibacterial self-etching system Clearfil Protect Bond showed lower bond strength values compared to primary dentin than that of to Clearfil SE Bond on primary dentin. (Eur J Dent 2008;2:11-17)

EDTA Treatment Improves Resin-Dentin Bonds’ Resistance to Degradation

2005 ◽  
Vol 84 (8) ◽  
pp. 736-740 ◽  
Author(s):  
R. Osorio ◽  
M.C.G. Erhardt ◽  
L.A.F. Pimenta ◽  
E. Osorio ◽  
M. Toledano
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Multiple Comparisons ◽  
Collagen Fibrils ◽  
The Other ◽  
Acid Etching ◽  
Collagen Network ◽  
Hybrid Layer ◽  
Strong Acids ◽  
Phosphoric Acid Etching

The existence of unprotected collagen fibrils within the hybrid layer compromises the longevity of restorations. This phenomenon may be avoided if solutions other than strong acids are used for dentin demineralization. The hypothesis to be tested is that bond durability may be improved by EDTA demineralization. Dentin surfaces (human and bovine) were bonded: (1) after phosphoric-acid-etching, and after EDTA demineralization with (2) a total-etch adhesive and (3) a self-etching adhesive. After the teeth were sectioned into beams, half of the specimens were immersed in NaOCl, while the other half was immersed in water. Beams were tested to failure in tension. ANOVA and multiple-comparisons tests were used (P < 0.05). No differences in bond strength were found among the 3 bonding procedures, although bonds made to human molars were 43-61% higher than those to bovine incisors. After NaOCl immersion, only specimens subjected to EDTA demineralization maintained the initial bond strength. We conclude that the collagen network is better-preserved after EDTA demineralization.

Application of Calcium Silicate Materials After Acid Etching May Preserve Resin-Dentin Bonds

2018 ◽  
Vol 43 (5) ◽  
pp. E243-E252 ◽  
Author(s):  
V Aggarwal ◽  
SS Bhasin
Keyword(s):  
Calcium Silicate ◽  
Water Solution ◽  
Acid Etching ◽  
Marginal Adaptation ◽  
Hybrid Layer ◽  
Etch And Rinse ◽  
Phosphate Buffered Saline ◽  
Silicate Materials ◽  
Scanning Electron ◽  
Group 1

SUMMARY Introduction: The aim of the present study was to evaluate the effect of the application of calcium silicate materials (CSMs), after acid etching, on the longevity of the hybrid layer and marginal adaptation of composite restorations. Methods and Materials: Eighty human permanent molars received an intrapulpal pressure of 15 cm H2O. Sixty teeth received a mesial proximal slot preparation with the gingival margin extending 1 mm below the cemento-enamel junction. The samples were divided into two groups. Group 1 received restorations using two types of etch-and-rinse adhesives: ethanol based (Single Bond, 3M ESPE, St Paul, MN, USA) and acetone based (Prime & Bond NT, Dentsply, DeTrey GmbH, Germany). In group 2 samples, a commercially available CSM (ProRoot MTA) was allowed to set before grinding and placing into a distilled water solution. This solution was applied on the cavity floor after acid etching. The surface was washed after 30 seconds followed by application of adhesives and restorations as in group 1. The samples were stored in phosphate-buffered saline for six months, maintaining the intrapulpal pressure. An epoxy replica was made, and the marginal adaptation was evaluated using scanning electron microscopy. The percentage of continuous margin (CM) was recorded for each group. Another 20 samples were used for hybrid layer evaluation. The crowns were ground to expose dentin. Intrapulpal pressure was applied. The samples were divided into two groups and restored similar to samples restored for marginal adaptation evaluation. The samples were longitudinally cut in 1-mm slices. The slices were stored under 15 cm of phosphate-buffered saline to simulate the pulpal pressure. After six months, the adhesive interface was evaluated using a scanning electron microscope. Statistical analysis was done with two-way analysis of variance with Holm-Sidak's correction for multiple comparisons. Results: Application of CSMs improved the marginal adaptation values in both adhesive groups. In group 1, there were areas of incomplete penetration of resins along with evidence of partial degradation of resin tags. Samples receiving CSM application after acid etching demonstrated long and regular resin tags with very few signs of degradation. Conclusions: Application of CSMs after acid etching can be a potential avenue in preserving the resin-dentin bonds.

scholarly journals Uninfiltrated Collagen in Hybrid Layers produced after Reduced Acid-etching Time on Primary and Permanent Dentin

2016 ◽  
Vol 17 (10) ◽  
pp. 861-866
Author(s):  
Josimeri Hebling ◽  
Débora LS Scheffel ◽  
Cláudia Huck ◽  
Diana G Soares ◽  
Fernanda G Basso ◽  
...  
Keyword(s):  
Primary Teeth ◽  
Adhesive System ◽  
Acid Etching ◽  
Etching Time ◽  
Bond Quality ◽  
Hybrid Layer ◽  
Microscopy Data ◽  
Adhesive Application ◽  
Hybrid Layers ◽  
Goldner’S Trichrome

ABSTRACT Aim This study evaluated the influence of acid-etching time on collagen exposure in adhesive interfaces established on primary and permanent dentin. Materials and methods Flat dentin surfaces were produced on sound primary molars and premolars (n = 8). The surfaces were divided into mesial and distal halves, and each half was etched with phosphoric acid for 5 or 15 seconds. The teeth were randomly allocated into two groups according to the adhesive system applied: Prime & Bond NT or Prime & Bond 2.1. After the adhesive application, the specimens were processed for Goldner's trichrome staining. The thickness of the uninfiltrated collagen zone (UCZ) in the hybrid layer was measured under optical microscopy. Data were analyzed by analysis of variance and Tukey tests (α = 0.05). Results The thickness of UCZ was adhesive dependent. Within the same substrate, the specimens treated with Prime & Bond 2.1 presented thicker UCZ when etched for 15 seconds. Collagen exposure was significantly higher for the primary teeth etched for 5 seconds and treated with Prime & Bond 2.1. Conclusion The thickness of UCZ in hybrid layers is directly affected by acid-etching time and by the adhesive system applied. Primary dentin seems to be more susceptible to collagen exposure than is permanent dentin. Clinical significance Both acid-etching time and adhesive system can influence the amount of exposed collagen interfering on resin–dentin bond quality, especially on primary dentin. How to cite this article Scheffel DLS, Huck C, Soares DG, Basso FG, de Souza Costa CA, Brackett MG, Pashley DH, Hebling J. Uninfiltrated Collagen in Hybrid Layers produced after Reduced Acid-etching Time on Primary and Permanent Dentin. J Contemp Dent Pract 2016;17(10):861-866.

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