Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cements
Background/purpose: No study has previously investigated and compared whether resin coating could prevent the effect of dehydration on flexural strengths and porosities of high powder-liquid and resin-modified glass ionomer cements (HPL-GIC and RM-GIC). The purpose of this study is to investigate th...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Journal of Dental Sciences |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1991790220300246 |
| _version_ | 1818385087368003584 |
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| author | Nathamon Thongbai-on Danuchit Banomyong |
| author_facet | Nathamon Thongbai-on Danuchit Banomyong |
| author_sort | Nathamon Thongbai-on |
| collection | DOAJ |
| description | Background/purpose: No study has previously investigated and compared whether resin coating could prevent the effect of dehydration on flexural strengths and porosities of high powder-liquid and resin-modified glass ionomer cements (HPL-GIC and RM-GIC). The purpose of this study is to investigate the effect of resin coating on flexural strengths and porosities of HPL-GIC and RM-GIC under a dry condition. Materials and methods: HPL-GIC (Equia Forte Fil) or RM-GIC (Fuji II LC) was mixed and loaded into a mold to create a bar-shaped specimen, n = 12 of each. The specimens were randomly divided into two groups, coated and uncoated, n = 6 of each. In the coated group, a resin coating agent (Equia Forte Coat) was applied and light cured for 20 s. After 72 h, each specimen was dried and scanned to detect porosities (% volume) using micro-computed tomography. After scanning, flexural strength (MPa) of the specimen was tested using a three-point bending method. Results: Porosities of HPL-GIC were significantly higher than RM-GIC, either coated or uncoated group (p < .05). Flexural strengths of coated and uncoated HPL-GIC were 41.47 ± 0.89 and 15.32 ± 1.15 MPa that were significantly lower than those of RM-GIC at 104.77 ± 3.97 and 52.90 ± 2.17 MPa (p < .05). Flexural strengths of coated GICs were significantly higher than uncoated GICs (p < .05). Conclusion: Resin coating increased flexural strengths of GICs under dry condition. HPL-GIC had higher porosities and lower flexural strength than RM- GIC. |
| first_indexed | 2024-12-14T03:32:35Z |
| format | Article |
| id | doaj.art-33d304e87f294d898554e9714d97183f |
| institution | Directory Open Access Journal |
| issn | 1991-7902 |
| language | English |
| last_indexed | 2024-12-14T03:32:35Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dental Sciences |
| spelling | doaj.art-33d304e87f294d898554e9714d97183f2022-12-21T23:18:43ZengElsevierJournal of Dental Sciences1991-79022020-12-01154433436Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cementsNathamon Thongbai-on0Danuchit Banomyong1Research Unit, Faculty of Dentistry, Mahidol University, Bangkok, ThailandDepartment of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand; Corresponding author. Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, 6 Yothi Road, Rajthawee, Bangkok, Thailand. Fax: +66 2 200 7824.Background/purpose: No study has previously investigated and compared whether resin coating could prevent the effect of dehydration on flexural strengths and porosities of high powder-liquid and resin-modified glass ionomer cements (HPL-GIC and RM-GIC). The purpose of this study is to investigate the effect of resin coating on flexural strengths and porosities of HPL-GIC and RM-GIC under a dry condition. Materials and methods: HPL-GIC (Equia Forte Fil) or RM-GIC (Fuji II LC) was mixed and loaded into a mold to create a bar-shaped specimen, n = 12 of each. The specimens were randomly divided into two groups, coated and uncoated, n = 6 of each. In the coated group, a resin coating agent (Equia Forte Coat) was applied and light cured for 20 s. After 72 h, each specimen was dried and scanned to detect porosities (% volume) using micro-computed tomography. After scanning, flexural strength (MPa) of the specimen was tested using a three-point bending method. Results: Porosities of HPL-GIC were significantly higher than RM-GIC, either coated or uncoated group (p < .05). Flexural strengths of coated and uncoated HPL-GIC were 41.47 ± 0.89 and 15.32 ± 1.15 MPa that were significantly lower than those of RM-GIC at 104.77 ± 3.97 and 52.90 ± 2.17 MPa (p < .05). Flexural strengths of coated GICs were significantly higher than uncoated GICs (p < .05). Conclusion: Resin coating increased flexural strengths of GICs under dry condition. HPL-GIC had higher porosities and lower flexural strength than RM- GIC.http://www.sciencedirect.com/science/article/pii/S1991790220300246Flexural strengthGlass ionomer cementMicro-computed tomographyPorosityResin coating |
| spellingShingle | Nathamon Thongbai-on Danuchit Banomyong Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cements Journal of Dental Sciences Flexural strength Glass ionomer cement Micro-computed tomography Porosity Resin coating |
| title | Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cements |
| title_full | Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cements |
| title_fullStr | Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cements |
| title_full_unstemmed | Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cements |
| title_short | Flexural strengths and porosities of coated or uncoated, high powder-liquid and resin-modified glass ionomer cements |
| title_sort | flexural strengths and porosities of coated or uncoated high powder liquid and resin modified glass ionomer cements |
| topic | Flexural strength Glass ionomer cement Micro-computed tomography Porosity Resin coating |
| url | http://www.sciencedirect.com/science/article/pii/S1991790220300246 |
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