Degradation of a Micro-Hybrid Dental Composite Reinforced with Polyaramide Fiber under the Influence of Cyclic Loads

Szalewski, Leszek; Kamińska, Aneta; Wallner, Eliza; Batkowska, Justyna; Warda, Tomasz; Wójcik, Dorota; Borowicz, Janusz

doi:10.3390/app10207296

Cited by 5 publications

(5 citation statements)

References 31 publications

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“…Inappropriate finishing and polishing may result in plaque retention, secondary caries, gingival inflammation, and failure of the restoration. Other reasons for degradation of dental restorations are the harsh conditions in the oral environment such as parafunctional forces and erosive agents [ 4 , 5 ]. In this study, we compared two polishing systems for resin composite materials: diamond-particle-coated burs and paper discs coated with aluminum-oxide.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of Different Finishing and Polishing Systems on Surface Roughness and Bacterial Adhesion of Resin Composite

et al. 2022

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Insufficient dental restoration finishing and polishing may lead to plaque accumulation, gingival inflammation, staining, caries, and esthetic impairment. Here, the effect of two finishing and polishing systems on surface roughness and bacterial adhesion were evaluated. Two finishing and polishing kits were evaluated: diamond burs (Shine 1-2, Strauss & Co, Raanana, Israel) and paper discs (Sof-Lex 3M ESPE, Seefeld, Germany) (n = 30 each). For each group surface roughness was evaluated using an optical profilometer (Contour GT-K1, Bruker, Billerica, MA, USA) (n = 10). Surface bacteria were evaluated for biofilm biomass using crystal violet (CV) staining (absorbance measured at 538 nm) and viable counts (CFU/mL) (n = 20). The control group included polymerized discs against a Mylar strip (n = 30). Student’s t test and one-way ANOVA were used for statistical evaluation. Diamond burs, paper discs, and control average surface RA were 169.4 ± 45.2 µ, 364 ± 77.7 µ, and 121.2 ± 18.1 µ, respectively. There was a significant difference found between all groups (p < 0.00001). Bacterial biomass on diamond burs, paper discs, and control samples were 0.458 ± 0.161, 0.507 ± 0.139, and 0.446 ± 0.142, respectively (p = 0.257). Viable bacterial counts (CFU/mL) on diamond burs, paper discs, and control samples were 2.25 × 104, 2.95 × 104, and 2.75 × 104, respectively (p = 0.856). A comparison between two finishing and polishing kits showed that the shine 1–2 diamond bur kit produced a smoother surface than the polishing disc kit. No differences were found in the biofilm biomass quantification and bacterial viable count between the groups.

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Section: Discussionmentioning

confidence: 99%

“…Oral conditions offer difficult surroundings for survival of the dental restorations. Various factors may affect the surface roughness and the adherence of the bacterial plaque, such as the type of polymerization, parafunction, and the patient’s diet [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Different Finishing and Polishing Systems on Surface Roughness and Bacterial Adhesion of Resin Composite

et al. 2022

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“…In extant studies, researchers have also experimented with different particles, aiming to identify those that would strengthen dental composite materials most effectively by modifying their mechanical properties [ 12 ]. For example, silicon nanoparticles in different weight ratios [ 2 ] or particles of aluminum trioxide [ 13 ], alumina-polycarbonate [ 14 ], and amorphous calcium phosphate [ 15 ] have been previously incorporated into the basic bisphenol A-glycidyl methacrylate (Bis-GMA) organic resin matrix.…”

Section: Introductionmentioning

confidence: 99%

Development of Light-Polymerized Dental Composite Resin Reinforced with Electrospun Polyamide Layers

Maletin,

Ristić,

Nešić

et al. 2023

Polymers

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As the mechanical properties of resin-based dental composite materials are highly relevant in clinical practice, diverse strategies for their potential enhancement have been proposed in the extant literature, aiming to facilitate their reliable use in dental medicine. In this context, the focus is primarily given to the mechanical properties with the greatest influence on clinical success, i.e., the longevity of the filling in the patient’s mouth and its ability to withstand very strong masticatory forces. Guided by these objectives, the goal of the present study was to ascertain whether the reinforcement of dental composite resins with electrospun polyamide (PA) nanofibers would improve the mechanical strength of dental restoration materials. For this purpose, light-cure dental composite resins were interspersed with one and two layers comprising PA nanofibers in order to investigate the influence of such reinforcement on the mechanical properties of the resulting hybrid resins. One set of the obtained samples was investigated as prepared, while another set was immersed in artificial saliva for 14 days and was subsequently subjected to the same set of analyses, namely Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). Findings yielded by the FTIR analysis confirmed the structure of the produced dental composite resin material. They also provided evidence that, while the presence of PA nanofibers did not influence the curing process, it strengthened the dental composite resin. Moreover, flexural strength measurements revealed that the inclusion of a 16 μm-thick PA nanolayer enabled the dental composite resin to withstand a load of 3.2 MPa. These findings were supported by the SEM results, which further indicated that immersing the resin in saline solution resulted in a more compact composite material structure. Finally, DSC results indicated that as-prepared as well as saline-treated reinforced samples had a lower glass transition temperature (Tg) compared to pure resin. Specifically, while pure resin had a Tg of 61.6 °C, each additional PA nanolayer decreased the Tg by about 2 °C, while the further reduction was obtained when samples were immersed in saline for 14 days. These results show that electrospinning is a facile method for producing different nanofibers that can be incorporated into resin-based dental composite materials to modify their mechanical properties. Moreover, while their inclusion strengthens the resin-based dental composite materials, it does not affect the course and outcome of the polymerization reaction, which is an important factor for their use in clinical practice.

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“…Also, quercetin can inhibit both MMP-2 and MMP-9 expression, mediating the interaction between both the anti-oxidation activity and expression of MMPs. (11)(12)(13) Another antioxidant that can be tried is chlorogenic acid. Chemically; it is an ester formed between caffeic acid and quinic acid.…”

Section: Introductionmentioning

confidence: 99%

Bonding performance of self adhesive flowable composite to dentin pretreated with four different natural matrix metalloproteinases inhibitors

Refai

2022

Egyptian Dental Journal

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Objective:The study attempted to assess the effect of application of four natural matrix metalloproteinases inhibitors (proanthocyanidin, quercetin, chlorogenic acid and hesperidin); as dentin pre-treatment agents; on the shear bond strength of Vertise Flow self adhesive flowable composite to dentin. Materials and methods:The study included five groups: Group I (control): Dentin was etched and the composite was applied without pre-treatment. Group II: Etched dentin was pre-treated with 2% proanthocyanidin prior to composite application. Group III: 2% quercetin solution was used. Group IV: 2 % chlorogenic acid was used. Group V: 2 % hesperidin solution was used.Shear bond strength of 40 specimens in each group was measured; 20 specimens were tested at 24 hours, and other 20 specimens were tested after thermocycling.Failure mode was analyzed according to Adhesive Remnant Index scoring system. Scanning electron microscopic imaging for the composite/ dentin adhesive junction was performed.Results: Shear bond strength testing after thermocycling revealed that group II recorded the highest value among all groups, whereas group IV recorded the least value. Concerning the failure mode; the majority of specimens of groups I and IV recorded score (1). Concerning groups II, III and V, the majority of specimens registered score (2). Conclusions:Proanthocyanidin can be considered a highly potent matrix metalloproteinases inhibitor to enhance and promote a satisfactory bonding stability of flowable composite to dentin, followed by quercetin and hesperidin. However, application of chlorogenic acid is not recommended.

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Degradation of a Micro-Hybrid Dental Composite Reinforced with Polyaramide Fiber under the Influence of Cyclic Loads

Cited by 5 publications

References 31 publications

Comparison of Different Finishing and Polishing Systems on Surface Roughness and Bacterial Adhesion of Resin Composite

Comparison of Different Finishing and Polishing Systems on Surface Roughness and Bacterial Adhesion of Resin Composite

Development of Light-Polymerized Dental Composite Resin Reinforced with Electrospun Polyamide Layers

Bonding performance of self adhesive flowable composite to dentin pretreated with four different natural matrix metalloproteinases inhibitors

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