Effects of a solubility enhancer on penetration of hydrophobic component in model adhesives into wet demineralized dentin

Guo, Xinglin; Spencer, Paulette; Wang, Yong; Ye, Qiang; Yao, Xiaomei; Williams, Karen

doi:10.1016/j.dental.2006.12.003

Cited by 46 publications

(58 citation statements)

References 20 publications

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“…In studies of bonding onto dentin, in which the bonding process is complex because of the unpredictable quantity of water in this tissue, it has been seen that the addition of PEGDMA allows the bond material to tolerate greater concentrations of water. Diffusion of bis-GMA monomers over an area of wet demineralized dentin is less than with adhesives without PEGDMA 18 because the relatively hydrophobic bis-GMA cannot adequately infiltrate demineralized dentin under wet bonding conditions. 19 Thus, the addition of PEGDMA might favor the infiltration of bis-GMAbased adhesives into the wet enamel and might pro-mote homogeneous distribution of hydrophobic components throughout the interface.…”

Section: Discussionmentioning

confidence: 99%

Water and Saliva Contamination Effect on Shear Bond Strength of Brackets Bonded with a Moisture-Tolerant Light Cure System

Vicente

Mena

Ortiz

et al. 2009

The Angle Orthodontist

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Objective: To evaluate the effects of water and saliva contamination on shear bond strength of brackets bonded with a moisture-tolerant light cure system. Materials and Methods: Brackets were bonded to 240 bovine lower incisors divided into 12 groups. Four bonding procedures were evaluated, including (1) TSEP/Transbond XT, (2) TMIP/ Transbond XT, (3) TSEP/Transbond PLUS, and (4) TMIP/Transbond PLUS, each under three different bonding conditions: without contamination, with water contamination, and with saliva contamination. Shear bond strength was measured with a universal testing machine. The adhesive remnant on the teeth was quantified with the use of image analyzing equipment. Results: Without contamination, bond strengths for the four procedures were similar (P Ͼ .05). TSEP/Tranbond PLUS and TMIP/Transbond PLUS left significantly less adhesive on the teeth after debonding than TSEP/Transbond XT and TMIP/Transbond XT (P Ͻ .008). Bond strength and adhesive remaining for TMIP/Transbond XT contaminated with water or saliva showed significantly worse performance than the other procedures evaluated (P Ͻ .008). Contamination (with water or saliva) did not affect either bond strength or adhesive remaining on the teeth for TSEP/ Transbond XT, TSEP/Transbond PLUS, or TMIP/Transbond PLUS (P Ͼ .017), although for TMIP/ Transbond XT, both variables showed significant reductions after contamination (P Ͻ .017). Conclusion: TSEP/Transbond PLUS, TMIP/Transbond PLUS, and TSEP/Transbond XT showed greater tolerance to wet conditions than was shown by TMIP/Transbond XT. (Angle Orthod. 2009; 79:127-132.)

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Section: Discussionmentioning

confidence: 99%

Water and Saliva Contamination Effect on Shear Bond Strength of Brackets Bonded with a Moisture-Tolerant Light Cure System

Vicente

Mena

Ortiz

et al. 2009

The Angle Orthodontist

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“…The lower percentage of premature failures observed for OptiBond All-In-One compared to those of GO confirms this aspect (Table 2). Another explanation for the good performance of OptiBond All-In-One could be the content of glycerol phosphate dimethacrylate monomer in its formulation, a surfactant monomer that may have facilitated the penetration of hydrophobic components into dentin, reducing the phase separation (12,13).…”

Section: Discussionmentioning

confidence: 99%

“…They are solubility enhancers that facilitate penetration of hydrophobic components into wet, demineralized dentin, reducing phase separation (12,13). The advantage of these monomers is that they result in formation of more stable cross-linked polymers facilitated by two polymerizable groups (12,13).…”

Section: Introductionmentioning

confidence: 99%

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Bond strength of HEMA-containing versus HEMA-free self-etch adhesive systems to dentin

Felizardo¹,

Lemos²,

Carvalho³

et al. 2011

Braz. Dent. J.

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This study analyzed the bond strength (BS) of HEMA versus HEMA-free self-etch adhesive systems to dentin. The occlusal surface of 20 third molars was removed and the dentin was abraded with 600-grit silicon carbide paper. The teeth were randomly assigned to 4 groups (n=5) and restored with GO, Adper SE Plus, OptiBond All-In-One, and Clearfil 3S Bond adhesive systems and Filtek Z350 composite. After light curing (600 mW/cm²), the teeth were stored in distilled water at 37ºC for 24 h and were sectioned in the mesiodistal and buccolingual directions to obtain sticks (0.8 mm²). The sticks were subjected to tensile force using a universal testing machine (0.5 mm/min), and the modes of failure were analyzed by scanning electron microscopy and classified as adhesive, cohesive, or mixed. The BS data (in MPa) were treated using one-way ANOVA and Tukey's tests at 5% significance. GO presented the lowest mean bond strength value (10.57 ± 3.72) and differed significantly from the other materials (p=0.001), which, in turn, presented statistically similar results (p>0.05) among themselves: Adper SE Plus (29.08 ± 8.93), OptiBond All-In-One (28.36 ± 6.49), and Clearfil 3S Bond (28.62 ± 6.97). Mixed fractures were the most prevalent. It was concluded that the influence of HEMA on BS to dentin was material dependent.

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“…Future adhesive systems need to be designed carefully to achieve a more homogeneous monomer distribution and conversion in the hybrid layer to overcome the defects associated with phase separation. In our lab, several approaches-such as optimization of hydrophobic/hydrophilic composition (Spencer and Wang, 2002;Ye et al, 2009b;Spencer et al, 2010), new crosslinkable monomers with branched structure , solubility enhancer (Guo et al, 2007(Guo et al, , 2008, and water-soluble photoinitiators (Wang et al, 2006;Ye et al, 2009a)-have been utilized to improve adhesive performance.…”

Section: Consideration Of Adhesive Development and Directions To Be Tmentioning

confidence: 99%

Ternary Phase Diagram of Model Dentin Adhesive Exposed to Over-wet Environments

Park

Laurence

et al. 2011

J Dent Res

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A supplemental appendix to this article is published electronically only at http://jdr.sagepub.com/supplemental. AbstrAct When adhesives and/or composites are bonded to the tooth, water in the environment can interfere with proper interface formation. Formation of water blisters and phase separation at the adhesive/ dentin interface have appeared as new types of bond defects. To better understand this problem, we determined the near-equilibrium partition of the hydrophobic/hydrophilic components when exposed to over-wet environments. Model methacrylate-based adhesives were mixed with different amounts of water to yield well-separated aqueous and resin phases. It was found that less than 0.1% BisGMA but nearly one-third of the HEMA diffused into the aqueous phase, leaving the remaining resin phase relatively hydrophobic. A partial phase diagram was created for the ternary BisGMA/HEMA/water system. All the experimental phase partitioning data were plotted, and the points lay on a binodal curve that separated the single-phase region from the two-phase region. We obtained the 3 tie lines by connecting the 2 points of each conjugate pair of the phase partitioning data from the 3 sets of tripartite mixtures. Information about solubility, water miscibility, distribution ratio, and phase partitioning behavior could be obtained quantitatively. This type of phase diagram will provide a more thorough understanding of current adhesive performance and elucidate directions for further improvement.

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Effects of a solubility enhancer on penetration of hydrophobic component in model adhesives into wet demineralized dentin

Cited by 46 publications

References 20 publications

Water and Saliva Contamination Effect on Shear Bond Strength of Brackets Bonded with a Moisture-Tolerant Light Cure System

Water and Saliva Contamination Effect on Shear Bond Strength of Brackets Bonded with a Moisture-Tolerant Light Cure System

Bond strength of HEMA-containing versus HEMA-free self-etch adhesive systems to dentin

Ternary Phase Diagram of Model Dentin Adhesive Exposed to Over-wet Environments

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