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. 2019 Feb 4:2019:5109481.
doi: 10.1155/2019/5109481. eCollection 2019.

Flexural Properties and Elastic Modulus of Different Esthetic Restorative Materials: Evaluation after Exposure to Acidic Drink

Andrea Scribante  1 , Marco Bollardi  2 , Marco Chiesa  2 , Claudio Poggio  2 , Marco Colombo  2
Affiliations

Flexural Properties and Elastic Modulus of Different Esthetic Restorative Materials: Evaluation after Exposure to Acidic Drink

Andrea Scribante et al. Biomed Res Int. .

Abstract

Background: Acidic beverages, such as soft drinks, can produce erosion of resin composites. The purpose of the present study was to investigate mechanical properties of different esthetic restorative materials after exposure to acidic drink.

Methods: Nine different composites were tested: nanofilled (Filtek Supreme XTE, 3M ESPE), microfilled hybrid (G-ænial, GC Corporation), nanohybrid Ormocer (Admira Fusion, Voco), microfilled (Gradia Direct, GC Corporation), microfilled hybrid (Essentia, GC Corporation), nanoceramic (Ceram.X Universal, Dentsply De Trey), supranano spherical hybrid (Estelite Asteria, Tokuyama Dental Corporation), flowable microfilled hybrid (Gradia Direct Flo, GC Corporation), and bulk fill flowable (SureFil SDR flow, Dentsply De Trey). Thirty specimens of each esthetic restorative material were divided into 3 subgroups (n=10): specimens of subgroup 1 were used as control, specimens of subgroup 2 were immersed in 50 ml of Coca Cola for 1 week, and specimens of subgroup 3 were immersed in 50 ml of Coca Cola for 1 month. Flexural strength and elastic modulus were measured for each material with an Instron Universal Testing Machine. Data were submitted to statistical analysis.

Results: After distilled water immersion, nanofilled composite showed the highest value of both flexural strength and elastic modulus, but its flexural values decreased after acidic drink immersion. No significant differences were reported between distilled water and acidic drink immersion for all other materials tested both for flexural and for elastic modulus values.

Conclusions: Even if nanofilled composite showed highest results, acidic drink immersion significantly reduced flexural values.

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Figures

Figure 1
Figure 1
Ad hoc stainless-steel device for specimen preparation.
Figure 2
Figure 2
Testing apparatus, before test.
Figure 3
Figure 3
Testing apparatus, after test.
Figure 4
Figure 4
Flexural strength (MPa) for each material tested after 24 hours' distilled water storage (Subgroup A, blue columns), one-week acidic drink storage (Subgroup B, orange columns), and 30 days' acidic drink storage (Subgroup C, grey columns).
Figure 5
Figure 5
Elastic Modulus (MPa) for each material tested after 24 hours' distilled water storage (Subgroup A, blue columns), one-week acidic drink storage (Subgroup B, orange columns), and 30 days' acidic drink storage (Subgroup C, grey columns).
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