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Compressive strength evaluation of giomer and compomer storage in different media

Published in Ektodermal Displazi Grubu - Türkiye
Volume: 13
Issue: 1
Pages: 23 - 28

The aim of the study was to evaluate and compare the compressive strength of both the giomer and compomer after storage in two different storage media: ethanol and artificial saliva. Two types of direct restorative materials of A3 shade were selected for this study: Compomer (Dyract extra Dentsply, Yourk , PA, USA) and Giomer (Beautiful-II, Shofu, San Marcos, CA, USA). Both compomer and giomer were placed in a mold of dimension 12 mm in height and 5 mm in diameter. Twenty specimens were prepared from each restorative material (total number of specimens was 40). Two types of storage media were selected for this study: 50% ethanol solution and artificial saliva. The materials were divided into 4 groups (n=10). G1 (giomer stored in ethanol); G2 (giomer stored in artificial saliva); G3 (compomer stored in ethanol) and G4 (compomer stored in artificial saliva). The samples were placed in the molds in 3 increments and the first two increments were cured for 40 seconds with bluephase light cure device. The last increment was covered with glass slide and cured also for 40 seconds. All samples were stored for 7 days in the selected solutions according to the previously mentioned groups. After storage the samples were placed in acrylic molds then submitted for compressive strength testing using Universal testing machine Testometric AX and were loaded (Cross-head speed 1.0 mm/min) until failure of the sample. Compressive strength values were recorded for each sample in MPa. Data was statistically analysed with one way ANOVA ant t-test at 5% level of significance. Statistical analysis of the data revealed that, there was a statistically significant difference between the 4 groups being tested (p≤ 0.05). The highest mean compressive strength values were recorded for compomer samples which were stored in artificial saliva followed by giomer samples which were stored in artificial saliva, giomer samples which were stored in ethanol solution, and compomer samples which were stored in ethanol solution which exhibited the least mean compressive strength value. In general, storage of giomer and compomer in ethanol resulted in much more reduction in their compressive strength values compared to storage them in artificial saliva. Although there was insignificant difference in compressive strength values between storage of giomer and compomer in ethanol or artificial saliva but the compomer tend to be more sensitive to ethanol storage than giomer. On the contrary, giomer tend to be more sensitive to artificial saliva storage than compomer. Clinical significance: Certain components in the mouth like alcohol or artificial saliva contain chemical or water components that might affect the compressive strength of certain direct restorative materials that might weaken the matrix/filler interface and consequently produce a negative effect on the general performance of the restoration in oral service.

About the journal
JournalJournal of International Dental and Medical Research
PublisherEktodermal Displazi Grubu - Türkiye
Open AccessYes