Efficiency of activated charcoal powder in stain removal and effect on surface roughness compared to whitening toothpaste in resin composite: in vitro study

To evaluate the bond strength of different universal adhesives on deciduous tooth dentineand their relationship with the composition and potential of hydrogen (pH). Methods: An in vitromicro push-out test on 150 samples (n = 50) per group per adhesive, namely, Adhese Universal(ADH; Ivoclar Vivadent), Futurabond U (FUT; Voco GmbH) (Test), and Scotchbond Universal withpre-conditioning (SCO; 3M) (Control), to record bond strength (BS) and type of adhesive failure.Results: The results of the different adhesives (megapascals (MPa)) varied, showing no statisticalsignificance. The corresponding averages are in MPa: ADH, 13.66 2.81; FUT, 14.48 2.88; SCO,14.98 3.96. Additionally, the frequency of type of failure was as follows: mixed (60.7%), adhesive(27.3%), and cohesive (12%). Conclusions: SCO, with a pH of 2.7, showed greater resistance tofracture, while FUT, with a pH of 2.3 and no pre-conditioning, approached the same values, being aone-step adhesive. No relationship was found between failure and type of adhesive.

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Comparison of the effects of different instrumentation techniques on root surface roughness and cement loss using microcomputed tomography: An in‐vitro study

International Journal of Dental Hygiene ◽

10.1111/idh.12543 ◽

2021 ◽

Author(s):

Fatma Karacaoglu ◽

Kaan Orhan

Keyword(s):

Surface Roughness ◽

In Vitro Study ◽

Microcomputed Tomography ◽

Root Surface ◽

Vitro Study

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A Comparitive Evaluation of the Effect of Sports and Fruit Drinks on the Surface Roughness of Nanofilled Composite and Light Cure GIC–An In Vitro Study

International Journal of Clinical Pediatric Dentistry ◽

10.5005/jp-journals-10005-1550 ◽

2018 ◽

Vol 11 (5) ◽

pp. 417-424

Author(s):

Hemalatha LNU

Keyword(s):

Surface Roughness ◽

In Vitro Study ◽

Vitro Study

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The behaviour of composites, glass ionomers and compomers in erosive conditions – in vitro study

Acta Medica Marisiensis ◽

10.2478/amma-2014-0042 ◽

2014 ◽

Vol 60 (5) ◽

pp. 200-203

Author(s):

Andreea Borş ◽

Cristina Molnar-Varlam ◽

Melinda Székely

Keyword(s):

Surface Roughness ◽

Wear Resistance ◽

Erosive Wear ◽

In Vitro Study ◽

Vitro Study ◽

Initial Surface ◽

Dental Filling ◽

Filling Materials ◽

Restorative Materials

Abstract Objective: The aim of this in vitro study was to evaluate the influence of erosive conditions on the wear resistance of aesthetic direct restorative materials. Methods: Six dental filling materials were tested: two composites (Filtek Z550 and X-tra fil), two compomers (Dyract Extra and Twinky Star) and two glass ionomers (Ketac Molar and Fuji II LC). Twenty disks (10mm×2mm) of each material were prepared (n=120) and kept in artificial saliva at 37˚C for 24 hours. Specimens were cycled in acidic soft drink (Coca-Cola) 5×/day, for 5’, over 30 days. Initial surface roughness ISR (Ra-μm) and final surface roughness FSR were measured using a profilometer. The wear rate was calculated as difference of final minus the initial roughness (ΔSR=FSR-ISR). For statistical analysis t-test and one-way ANOVA test were used by GraphPad Prism version 5.03 statistical software. The level of significance was set at p<0.05. Results: The erosive wear rates (mean±SD, μm) after exposure to acidic beverage were: 0.30±0.03 (Ketac Molar), 0.28±0.04 (Fuji II LC), 0.27±0.00 (Filtek Z550), 0.23±0.01 (X-tra fil), 0.20±0.00 (Twinky Star) and 0.14±0.01 Dyract Extra, respectively. There were significant differences between the tested materials (p<0.05). Conclusions: Dental filling materials had different behaviour under the same erosive condition, however all investigated aesthetic restorative materials showed surface degradation. These findings suggest that erosive wear resistance of tooth coloured restoratives could influence their longevity in intraoral acidic conditions. Acknowledgements: The study was supported by the Internal Research Grant no. 5/30.01.2013 of the University of Medicine and Pharmacy of Tirgu Mureş.

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