The effects of acid erosion and remineralization on enamel and three different dental materials: FT‐Raman spectroscopy and scanning electron microscopy analysis

Soares, Luís Eduardo Silva; Soares, Ana Lúcia Silva; Oliveira, Rodrigo de; Nahórny, Sídnei

doi:10.1002/jemt.22679

Cited by 19 publications

(14 citation statements)

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“…Plaque is a predisposing factor to caries and periodontal disease, and dental hygiene is extremely important for oral health [33] as a soiled acidic environment could damage enamel [34], dentin [35], restorative materials [36], and prosthodontic frameworks [37]. In our research, a rotating oscillating electrical device was used, as rotation oscillation powered brushes significantly reduce plaque.…”

Section: Discussionmentioning

confidence: 97%

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

et al. 2020

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Fiber reinforced composites (FRCs) are metal free materials that have many applications in dentistry. In clinical orthodontics, they are used as retainers after active treatment in order to avoid relapse. However, although the modulus of the elasticity of FRCs is low, the rigidity of the material in the form of a relatively thick retainer with a surface cover of a flowable resin composite is known to have higher structural rigidity than stainless steel splints. The aim of the present study is to measure load and bending stress of stainless steel wires, as well as flowable resin composite covered and spot-bonded FRC retainer materials after tooth brushing. These materials were tested with a three point bending test for three different conditions: no brushing, 26 min of brushing, and 60 min of brushing. SEM images were taken before and after different times of tooth brushing. Results showed that stainless steel was not significantly affected by tooth brushing. On the other hand, a significant reduction of values at maximum load at fracture was reported for both FRC groups, and uncovered FRCs were most affected. Concerning maximum bending stress, no significant reduction by pretreatment conditions was reported for the materials tested. SEM images showed no evident wear for stainless steel. Flowable resin composite covered FRCs showed some signs of composite wear, whereas spot-bonded FRCs, i.e., without the surface cover of a flowable resin composite, showed signs of wear on the FRC and exposed glass fibers from the FRC’s polymer matrix. Because of the significant changes of the reduction of maximum load values and the wear for spot-bonded FRCs, this technique needs further in vitro and in vivo tests before it can be performed routinely in clinical practice.

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Section: Discussionmentioning

confidence: 97%

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

et al. 2020

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“…13 This frequent interaction compromises the properties of these materials, reflecting on esthetic damages and reduced duration. 6,7 Furthermore, the acidic environment promoted by acid food and beverages is correlated with dentin 14 and enamel 15 injury. Moreover, the degradation of restorative and prosthodontic materials has been also reported.…”

Section: Discussionmentioning

confidence: 99%

Effect of acidic beverages on surface roughness and color stability of artificial teeth and acrylic resin

et al. 2020

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PURPOSE. The aim was to evaluate the effect of four acidic beverages on the roughness (Ra) and color change (ΔE ab) of two brands of artificial teeth and a heat-polymerized acrylic resin (HPAR) for use in a prosthetic base. MATERIALS AND METHODS. All materials were divided into 5 groups, according to the used acidic beverage (artificial saliva-control, red wine, orange juice, coke-based, and lemon juice-based soft drink). The immersion process was divided into two stages: T1-immersion in the acidic solutions for 10 minutes for 14 days; T2-after T1, the samples were immersed in grape juice for 14 days. The Ra of the samples was evaluated in a rugosimeter and the ΔE ab in a spectrophotometer, before and after the immersions. The analysis of variance of one (ΔE ab) and two factors (Ra) and Tukey were performed (α=.05). RESULTS. There was a statistical difference for roughness after immersion (T1) for Trilux and Tritone teeth, regardless of the acid solution. For Trilux teeth, all acid solutions increased Ra (P<.05). For Tritone teeth, only the coke-based soft drink did not statistically change Ra. Grape juice (T2) altered Ra only of artificial teeth (P<.05). The color was changed for all materials, after T1 and T2. CONCLUSION. In general, the acidic solutions changed the Ra and ΔE ab of HPAR and artificial teeth after T1. The grape juice altered the roughness only of the artificial teeth, promoting a clinically acceptable color change in the materials.

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“…The acidic liquid (Pepsi Twist ® ) and the time protocol (5 cycles per day during 6 days) used in this study were based on previous studies [11,13] that also evaluated erosion in dental materials, as well as the present study. In addition, the use of a high intensity erosive challenge protocol was chosen in the present study to closely match the clinical situation, since the constant and intense consumption of soft drinks has been noticed by most of the world population [17].…”

Section: Discussionmentioning

confidence: 99%

“…The SMHinitial Knoop of each restoration was obtained with three indentations spaced 100 µm apart from each other, at a 10 g load and 5 s dwell time.Erosive ChallengeBefore the erosive challenge, half of each specimen (initial area), including enamel and resin composite, was covered with an acid-resistant varnish (nail varnish)(Figure 1 K). Then, the specimens were submitted to an erosive challenge, as recommended by some authors[10,11]. Demineralization through immersion and gentle shaking for 10 min in 30 mL of Pepsi Twist (carbonated water, sugar, cola nut extract, concentrated lemon juice, caffeine, caramel coloring, sodium benzoate, sodium citrate, citric acid and phosphoric acid, AMBEV, Jundiaí, São Paulo, SP, Brazil), pH = 3.2; rinsing with Mili-Q water for 30 s; and remineralization through immersion for 1 h in 30mL of artificial saliva (0.2205g/L calcium chloride, 0.1224g/L potassium phosphate, 11.182g/L potassium chloride, 12.114g/L Tris and 500µL/L Fluorine)[12].…”

mentioning

confidence: 99%

Topography and Microhardness Changes of Nanofilled Resin Composite Restorations Submitted to Different Finishing and Polishing Systems and Erosive Challenge

Vieira

Alexandria

Magno

et al. 2020

Pesqui. Bras. Odontopediatria Clín. Integr.

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How to cite this article: Canto FMT, Alexandria AK, Magno MB, Silva EM, Maia LC. Topography and microhardness changes of nanofilled resin composite restorations submitted to different finishing and polishing systems and erosive challenge. Pesqui Bras Odontopediatria Clín Integr. 2020; 20:e4812. https://doi. AbstractObjective: To evaluate the topography and microhardness of composite resin restorations submitted to different finishing and polishing systems before and after erosive challenge. Material and Methods: Thirty standardized cavities prepared in enamel-dentin blocks of bovine incisors were restored with Z350 composite resin, and randomly distributed into three groups (n=10) according to the finishing and polishing systems: G1 = Soflex 4 steps, G2 = Soflex Spiral 2 steps and G3 = PoGo (single step). The specimens were half protected with nail varnish and submitted to five immersions in Pepsi Twist ® , for 10 minutes each, five times/day during six consecutive days. The initial and final challenge surface microhardness (SMHinitial and SMHfinal) of the composite resin was evaluated and the percentage of SMH loss (%SMHL) was calculated. After protection removal, the topographic change linear (Ra) and volumetric (Sa) roughness was evaluated in initial and final areas by using 3D non-contact optical profilometry and scanning electron microscopy (SEM). Data were analyzed by paired Student's t-test, Kruskal-Wallis test, and by ANOVA and Tukey's test. Results: There was significant intra-group %SMHL in composite resin (p<0.05). Differences among groups in %SMHL, Ra/Sa in resin composite were not observed (p>0.05). SEM images revealed structural changes between the initial and final surfaces for all groups. Conclusion: The three types of finishing and polishing systems had a similar influence on %SMHL, Ra and Sa in the nanofilled composite resin.

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The effects of acid erosion and remineralization on enamel and three different dental materials: FT‐Raman spectroscopy and scanning electron microscopy analysis

Cited by 19 publications

References 49 publications

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

Effect of acidic beverages on surface roughness and color stability of artificial teeth and acrylic resin

Topography and Microhardness Changes of Nanofilled Resin Composite Restorations Submitted to Different Finishing and Polishing Systems and Erosive Challenge

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