scholarly journals The Influence of Modified Experimental Dental Resin Composites on the Initial In Situ Biofilm—A Triple-Blinded, Randomized, Controlled Split-Mouth Trial

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2814
Author(s):  
Niklas Burgard ◽  
Melanie Kienitz ◽  
Claudia Jourdan ◽  
Stefan Rüttermann
Keyword(s):  
Delivery System ◽  
Resin Composites ◽  
Materials Chemistry ◽  
Dental Resin ◽  
Significance Level ◽  
Dental Resin Composites ◽  
Post Hoc ◽  
Initial Biofilm

The purpose of the study was to investigate the bacterial viability of the initial biofilm on the surface of experimental modified dental resin composites. Twenty-five healthy individuals with good oral hygiene were included in this study. In a split-mouth design, they received acrylic splints with five experimental composite resin specimens. Four of them were modified with either a novel polymeric hollow-bead delivery system or methacrylated polymerizable Irgasan (Antibacterial B), while one specimen served as an unmodified control (ST). A delivery system based on Poly-Pore® was loaded with one of the active agents: Tego® Protect 5000 (Antiadhesive A), Dimethicone (Antiadhesive B), or Irgasan (Antibacterial A). All study subjects refrained from toothbrushing during the study period. Specimens were detached from the splints after 8 h and given a live/dead staining before fluorescence microscopy. A Friedman test and a post hoc Nemenyi test were applied with a significance level at p < 0.05. In summary, all materials but Antibacterial B showed a significant antibacterial effect compared to ST. The results suggested the role of the materials’ chemistry in the dominance of cell adhesion. In conclusion, dental resin composites with Poly-Pore-loaded active agents showed antibacterial effectiveness in situ.

scholarly journals The Influence of Modified Experimental Dental Resin Composites on the Initial In Situ Biofilm – A Triple-Blinded Randomized Controlled Split-Mouth Trial

2021 ◽  
Author(s):  
Niklas Burgard ◽  
Melanie Kienitz ◽  
Claudia Jourdan ◽  
Stefan Rüttermann
Keyword(s):  
Delivery System ◽  
Antibacterial Effect ◽  
Resin Composites ◽  
Dental Resin ◽  
Significance Level ◽  
Randomized Controlled ◽  
Dental Resin Composites ◽  
Post Hoc ◽  
Initial Biofilm

The purpose of the study was to investigate the bacterial viability of the initial biofilm on the surface of experimental modified dental resin composites. Twenty-five healthy individuals with good oral hygiene were included in this study. In a split-mouth design, they received acrylic splints with five experimental composite resin specimens. Four of them were modified with either a novel polymeric hollow beads delivery system or methacrylated polymerizable Irgasan (Antibacterial B), while one specimen served as unmodified control (ST). The delivery system based on Poly-Pore&reg; was loaded with one of the active agents Tego&reg; Protect 5000 (Antiadhesive A), Dimethicone (Antiadhesive B) or Irgasan (Antibacterial A). All study subjects refrained from toothbrushing during the study period. Specimens were detached from the splints after 8h and given a live/dead staining before fluorescence microscopy. Friedman test and post-hoc Nemenyi test were applied with significance level at p &amp;lt; 0.05. In summary all materials but Antibacterial B showed a significant antibacterial effect compared to ST. In conclusion dental resin composites with Poly-Pore loaded active agents show antibacterial effectiveness in situ.

Effect of light intensity and water aging on surface hardness of dental resin-composites

2019 ◽  
Vol 64 (11) ◽  
pp. 1007-1014
Author(s):  
Tong XU ◽  
◽  
Jia-Hui ZHANG ◽  
Zhao-Ying LIU ◽  
Xuan LI ◽  
...  
Keyword(s):  
Light Intensity ◽  
Surface Hardness ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites ◽  
Effect Of Light

Viscosity and stickiness of dental resin composites at elevated temperatures

2021 ◽  
Vol 37 (3) ◽  
pp. 413-422
Author(s):  
Nikolaos Loumprinis ◽  
Eva Maier ◽  
Renan Belli ◽  
Anselm Petschelt ◽  
George Eliades ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites

scholarly journals Effect of Accelerated Aging on Some Mechanical Properties and Wear of Different Commercial Dental Resin Composites

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2769
Author(s):  
Jonne Oja ◽  
Lippo Lassila ◽  
Pekka K. Vallittu ◽  
Sufyan Garoushi
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Accelerated Aging ◽  
Wear Depth ◽  
Resin Composites ◽  
Expiration Date ◽  
Dental Resin ◽  
Hydrothermal Aging ◽  
Dental Resin Composites

The aim of current in vitro research was to determine the effect of hydrothermal accelerated aging on the mechanical properties and wear of different commercial dental resin composites (RCs). In addition, the effect of expiration date of the composite prior its use was also evaluated. Five commercially available RCs were studied: Conventional RCs (Filtek Supreme XTE, G-aenial Posterior, Denfil, and >3y expired Supreme XTE), bulk-fill RC (Filtek Bulk Fill), and short fiber-reinforced RC (everX Posterior). Three-point flexural test was used for determination of ultimate flexural strength (n = 8). A vickers indenter was used for testing surface microhardness. A wear test was conducted with 15,000 chewing cycles using a dual-axis chewing simulator. Wear pattern was analyzed by a three-dimensional (3D) noncontact optical profilometer. Degree of C=C bond conversion of monomers was determined by FTIR-spectrometry. The specimens were either dry stored for 48 h (37 °C) or boiled (100 °C) for 16 h before testing. Scanning electron microscopy (SEM) was used to evaluate the microstructure of each material. Data were analyzed using ANOVA (p = 0.05). Hydrothermal aging had no significant effects on the surface wear and microhardness of tested RCs (p > 0.05). While flexural strength significantly decreased after aging (p < 0.05), except for G-aenial Posterior, which showed no differences. The lowest average wear depth was found for Filtek Bulk Fill (29 µm) (p < 0.05), while everX Posterior and Denfil showed the highest wear depth values (40, 39 µm) in both conditions. Passing the expiration date for 40 months did not affect the flexural strength and wear of tested RC. SEM demonstrated a significant number of small pits on Denfil’s surface after aging. It was concluded that the effect of accelerated aging may have caused certain weakening of the RC of some brands, whereas no effect was found with one brand of RC. Thus, the accelerated aging appeared to be more dependent on material and tested material property.

Evaluating antibacterial and surface mechanical properties of chitosan modified dental resin composites

2020 ◽  
Vol 28 (2) ◽  
pp. 165-173 ◽  
Author(s):  
Shahid Ali ◽  
Laila Sangi ◽  
Naresh Kumar ◽  
Bharat Kumar ◽  
Zohaib Khurshid ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites

Synthesis of two PET waste derived bisacrylic and bisallylic monomers and their potential use as crosslinking agents and dental resin composites

2014 ◽  
Vol 132 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
Juan Coreño Alonso ◽  
Antonio Cruz Aguilar ◽  
Carlos Enrique Cuevas-Suárez ◽  
Rosa Ángeles Vázquez García ◽  
Ana María Herrera-González
Keyword(s):  
Resin Composites ◽  
Dental Resin ◽  
Pet Waste ◽  
Dental Resin Composites ◽  
Potential Use ◽  
Crosslinking Agents

Changes in surface characteristics of dental resin composites after polishing

2005 ◽  
Vol 16 (4) ◽  
pp. 347-353 ◽  
Author(s):  
Mi-Sook Choi ◽  
Yong-Keun Lee ◽  
Bum-Soon Lim ◽  
Sang-Hoon Rhee ◽  
Hyeong-Cheol Yang
Keyword(s):  
Surface Characteristics ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites

scholarly journals How do the optical properties of the bulk fill posterior composites change after 2 years of simulated toothbrushing?

2019 ◽  
Vol 22 (3) ◽  
pp. 378-386
Author(s):  
Leticia Souza Lopes ◽  
Helio Rodrigues Sampaio Filho ◽  
Elisa Gomes Albuquerque ◽  
Chane Tardem ◽  
Mauro Sayão Miranda ◽  
...  
Keyword(s):  
Optical Properties ◽  
Resin Composite ◽  
High Viscosity ◽  
Composite Resins ◽  
Resin Composites ◽  
Regression Analyses ◽  
Significance Level ◽  
Composite Control ◽  
Multifactor Analysis ◽  
Post Hoc

The objective of this study was to evaluate the alteration of the optical properties of bulk Fill resin-based composites after 2 years of simulated toothbrushing. Three high-viscosity bulk fill resin composites and one conventional sculptable resin composite (control) were analyzed. Five specimens of each resin composite were prepared, and roughness, color, translucency and gloss were evaluated initially and after one and two years of simulated toothbrushing. The specimens were submitted to electric simulated toothbrushing (14600 strokes/100g) using a commercially available toothbrush with soft fibers and toothpaste slurry in a proportion of 1:2 by weight. The brushing scheme was of 40 cycles per day (2 cycles per second / 280 cycles in a week). The optical properties and the roughness data were analyzed by a multifactor analysis of variance (MANOVA) and a Tukey post hoc test. The baseline and final values of Ra and Sa were submitted to linear regression analyses, all of which were performed at a significance level of p=0.05. Gloss and roughness presented statistical differences between the resin-time interactions in all composite resins. The gloss (72.5%) and roughness (89.4%) worsened significantly after brushing, but the authors didn’t find statistically significant differences when evaluating translucency and color. Based in the results, it could be concluded that the simulated brushing degraded the brightness and roughness of the used high-viscosity bulk fill composites.

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