Bond strength of self-adhesive flowable resin composites to tooth structure

Troconis, Cristhian Camilo Madrid; Pérez, Samantha Molina

doi:10.20396/bjos.v20i00.8663641

Cited by 3 publications

(6 citation statements)

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“…The results of this study also correspond with a systematic review conducted by Troconis and Pérez [25], while the results of this study differed from the study of Sachdeva et al, which showed no significant differences in terms of the microleakage because they did not perform thermocycling before applying the dye penetration [26].…”

Section: Discussionsupporting

confidence: 77%

Evaluation of Self-Adhesive Composite Restorations Bond on Primary Canines: An In Vitro Study

Bashi¹,

Bshara²,

Alzoubi³

2023

Cureus

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Background and purposeThe aesthetic requirements for the restoration of the primary anterior teeth of both the child and his parents increased recently, especially with the presence of materials with good mechanical properties capable of giving a good aesthetic shape. However, the challenge remains in the possibility of applying these materials to primary teeth, where the child's cooperation and ability to keep their mouth open during the completion of the restoration is an important challenge for the dentist. Therefore, this study aimed to evaluate the bonding of self-adhesive composite by studying the microleakage in primary canines. Materials and methodsThe studied sample consisted of 60 extracted primary canines that were divided into three equal groups (n=20) according to the type of restoration: group 1 (experimental) -self-adhesive composite alone, group 2 (experimental) -self-adhesive composite with selective enamel etching, and group 3 (control)conventional composite with the self-etching bond and selective enamel etching. A Class V cavity was prepared at the cementoenamel junction, 2 mm deep and 1 mm in diameter. In this way, the gingival wall is dentine, while the incisal wall is enamel-dentine. Restorations were placed according to the group to which the tooth belongs. After that, all teeth were subjected to 500 cycles of thermocycling. Then, a methylene blue dye microleakage test was performed, and longitudinal sections of the teeth were made and studied under x20 magnification using a stereo microscope. ResultsIn the gingival wall, the scores of microleakage in the conventional composite group after selective etching were lower than those of the self-adhesive composite groups, with a statistically significant difference. While in the incisal wall, there were no statistically significant differences in the frequencies of the scores of microleakage between the three groups. ConclusionsWithin the limitations of this study, the conventional composite bonded better to enamel and dentine than self-adhesive composite resin applied alone or after selective enamel etching. The bonding of the selfadhesive composite was lower than that of the conventional composite, and it is not recommended to use it in Class V restorations of primary anterior teeth.

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Section: Discussionsupporting

confidence: 77%

Evaluation of Self-Adhesive Composite Restorations Bond on Primary Canines: An In Vitro Study

Bashi¹,

Bshara²,

Alzoubi³

2023

Cureus

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“…However, these systems, featuring several or just one application step, are still technique-sensitive and prone to degradation owing to their hydrophilic nature [1]. For this reason, following the trend of simplifying procedures, there is a need to find new, efficient, and long-lasting alternatives in the field of restorative dentistry [2,3]. The Minamata Convention in 2013, which phased out amalgam use, sparked the drive to research new general-purpose dental restorative materials with competitive properties [4].…”

Section: Introductionmentioning

confidence: 99%

“…These can be glycerophosphate dimethacrylate (GPDM) or 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP), which promote self-etching features and chemical bonding potential [7]. Enriching SACs with functional monomers is intended to establish chemical adhesion following superficial etching without requiring an adhesive system [3,[8][9][10]. This simplification aims to reduce the variability in the bonding procedure, the risk of clinical errors (because fewer steps are needed), the need for moisture control, and eventually also reduce postoperative sensitivity [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…However, they have shown significantly lower bond strengths compared to conventional restorative materials, applied using etchand-rinse (E&R) or self-etch (SE) techniques, particularly when there is aprismatic enamel or dentin covered by a smear layer [13,[18][19][20]. The interaction between these self-adhesive resins and the substrate (specifically dentin) is very limited, as they demonstrate very little retention and poor sealing, resulting in significant clinical failure rates [3,14,21]. Delgado et al [22] also showed that these materials cannot form a proper hybrid layer as conventional adhesives.…”

Section: Introductionmentioning

confidence: 99%

“…Although adhesive functional monomers are acidic, their acidity may not be sufficient to promote a relevant pattern of demineralization in dental substrates, which guarantees bonding and sealing of the cavity [3]. Previous studies have concluded that SACs present higher microleakage in enamel and dentin margins compared to when they are restored with an SE adhesive [25].…”

Section: Introductionmentioning

confidence: 99%

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Effect of varying functional monomers in experimental self-adhesive composites: polymerization kinetics, cell metabolism influence and sealing ability

Ferreira,

Neves Dos Santos,

Fernandes

et al. 2023

Biomed. Mater.

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The aim was to evaluate the effects of adding different functional monomers to experimental self-adhesive composites on polymerization kinetics, cell metabolic activity, and sealing ability. Self-adhesive composites were formulated using urethane dimethacrylate (UDMA) as the base monomer and triethylene glycol dimethacrylate (TEGDMA). Additionally, 10 wt.% of distinct functional monomers were added - 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP), glycerol phosphate dimethacrylate (GPDM), 2-hydroxyethyl methacrylate (HEMA) or hydroxyethyl acrylamide (HEAA). ATR-FTIR was used to determine real-time polymerization kinetics (20 min, n=3). The final extrapolated conversion and polymerization rates were determined (DC,max; Rp,max). The DC,max values were employed to calculate volumetric shrinkage. The MTT assay was performed on MDPC-23 cells using disc extracts at different concentrations (n=8). Class V cavities were prepared in 60 sound human molars, assigned to six groups (n=10), depending on the composite used and aging type (T0 or TC, if thermocycled for 10 000 cycles). One-way ANOVA, two-way, and Kruskal-Wallis tests were employed to treat the data (ɑ=0.05). Varying the functional monomers had a large impact on DC,max, as confirmed by one-way ANOVA (p<0.001). The highest was obtained for HEMA (64±3%). The HEMA and HEAA formulations were found to be significantly more toxic at concentrations below 100%. For microleakage, having a functional monomer or not did not show any improvement, irrespective of margin or aging period (Mann-Whitney U, p>0.05). Larger functional monomers MDP and GPDM affected polymerization properties. Conversely, their acidity did not seem to be detrimental to cell metabolic activity. Regarding sealing ability, it seems that the functional monomers did not bring an advantage to the composites. Varying the functional monomer in self-adhesive composites had a clear impact on the polymerization kinetics as well as on their cytotoxic potential. However, it did not confer better microleakage and sealing. Claiming self-adhesiveness based only on functional monomers seems dubious.

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Tensile Bond Strength and Marginal Integrity of a Self-adhering and a Self-etch Adhesive Flowable Composite after Artificial Thermomechanical Aging

Ajay¹,

Kamatchi²,

Gawthaman³

et al. 2022

International Journal of Clinical Pediatric Dentistry

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A bstract Aim This study aims to compare the self-etch adhesive (SEA) and self-adhesive flowable composite (SAF) concerning tensile bond strength (TBS) and marginal integrity by microleakage ( µ LK) test in deciduous molars after artificial thermomechanical aging. Materials and methods 120 extracted primary molars were collected. Sixty teeth were mounted for testing TBS. Teeth were restored using SAF ( n = 30) and SEA-conventional flowable (CF) composite ( n = 30) and subjected to artificial thermal aging. Half the teeth ( n = 15) from each material were subjected to mechanical loading (SEA-TBS-L and SAF-TBS-L). The specimens with no-load (NL) served as control (SEA-TBS-NL and SAF-TBS-NL). Class V cavity prepared and restored with SAF ( n = 30) and SEA-CF ( n = 30) to test µ LK after thermal aging. The subgroups were as same as the TBS based on with or without mechanical loading (SEA- µ LK-L, SEA- µ LK-NL, SAF- µ LK-L, SAF- µ LK-L; n = 15 each). µ LK was determined by employing the dye immersion technique. Results Concerning TBS, there is a significant difference between SEA and SAF with load or no load. Concerning µ LK, there is a significant difference between the materials under loading and no difference was found when not mechanically loaded. Also, concerning both TBS and µ LK, a significant difference was observed between the load and no-load subgroups within each material. Conclusion SAF exhibited higher TBS than the SEA. Mechanical loading not only adversely affected the TBS but also increased the µLK of the compared materials. C linical S ignificance Restoring the primary teeth with SAF not only shortens the laborious operatory time but also yields good clinical serviceability with the good bond strength and minimal µ LK, thus preventing premature loss of teeth and consequential malocclusion. How to cite this article Kamatchi M, Ajay R, Gawthaman M, et al. Tensile Bond Strength and Marginal Integrity of a Self-adhering and a Self-etch Adhesive Flowable Composite after Artificial Thermomechanical Aging. Int J Clin Pediatr Dent 2022;15(2):204-209.

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Bond strength of self-adhesive flowable resin composites to tooth structure

Cited by 3 publications

References 50 publications

Evaluation of Self-Adhesive Composite Restorations Bond on Primary Canines: An In Vitro Study

Evaluation of Self-Adhesive Composite Restorations Bond on Primary Canines: An In Vitro Study

Effect of varying functional monomers in experimental self-adhesive composites: polymerization kinetics, cell metabolism influence and sealing ability

Tensile Bond Strength and Marginal Integrity of a Self-adhering and a Self-etch Adhesive Flowable Composite after Artificial Thermomechanical Aging

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