Marginal microleakage around Class V cavities restored with glass ceramic inserts of different coefficients of thermal expansion

Chuei Luan Tan, Ario Santini

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective: Evaluate microleakage around Class V resin restorations restored with glass ceramic inserts of different coefficients of thermal expansion. Methodology: Sixty non-carious extracted human premolars (patient age range 12-20 years) were randomly assigned to three groups. Standard Class V preparations were cut in the buccal surface using customized Cerana burs, size 3. Glass ceramic inserts from two manufacturers (Cerana and Beta-Quartz) were used to restore the cavities, and were luted with a hybrid, high-viscous composite (Tetric Ceram) and a bonding agent (Excite). A control group, without inserts, was bulk-filled with a hybrid, high-viscous composite (Tetric Ceram). In accordance with American Dental Association (ADA) guidelines, half the preparation was in enamel and half in dentine/cementum, and had a mesio-distal width of 3 mm, an occluso-gingival height of 3 mm, and a depth of 2 mm. All margins had butt joints. The teeth were thermocycled 4,000 times between water baths held at 5°C and 55°C, and the specimens prepared and examined for microleakage using 2.0% Procion Red® dye, buffered at pH 7 as a marker. Results: Microleakage was significantly less around cavities restored with Cerana glass ceramic inserts than around cavities restored with Beta Quartz glass ceramic inserts or the control cavities at both the occlusal and gingival margins, p = 0.003 and p = 0.014, respectively. Comparisons of both occlusal and gingival margins within both test groups and the control group showed there was significantly less microleakage at the enamel-resin interface than at the dentine-resin interface (p < 0.05 in all cases) Conclusion: The results strongly suggest that restorations restored with Cerana glass ceramic inserts, which have a coefficient of thermal expansion approximating that of enamel, result in a decrease in marginal microleakage compared to Beta Quartz glass ceramic inserts and Tetric Ceram resin-based composite material.

Original languageEnglish
Pages (from-to)26-31
Number of pages6
JournalJournal of Clinical Dentistry
Volume16
Issue number1
Publication statusPublished - 2005
Externally publishedYes

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Dental Enamel
Hot Temperature
Dentin
American Dental Association
Dental Cementum
Control Groups
Quartz
Composite Resins
Cheek
Bicuspid
Baths
Tooth
Coloring Agents
Joints
Guidelines
Glass ceramics
Cerana
Water
Tetric ceram
Beta-Quartz glass-ceramic

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Marginal microleakage around Class V cavities restored with glass ceramic inserts of different coefficients of thermal expansion. / Tan, Chuei Luan; Santini, Ario.

In: Journal of Clinical Dentistry, Vol. 16, No. 1, 2005, p. 26-31.

Research output: Contribution to journalArticle

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abstract = "Objective: Evaluate microleakage around Class V resin restorations restored with glass ceramic inserts of different coefficients of thermal expansion. Methodology: Sixty non-carious extracted human premolars (patient age range 12-20 years) were randomly assigned to three groups. Standard Class V preparations were cut in the buccal surface using customized Cerana burs, size 3. Glass ceramic inserts from two manufacturers (Cerana and Beta-Quartz) were used to restore the cavities, and were luted with a hybrid, high-viscous composite (Tetric Ceram) and a bonding agent (Excite). A control group, without inserts, was bulk-filled with a hybrid, high-viscous composite (Tetric Ceram). In accordance with American Dental Association (ADA) guidelines, half the preparation was in enamel and half in dentine/cementum, and had a mesio-distal width of 3 mm, an occluso-gingival height of 3 mm, and a depth of 2 mm. All margins had butt joints. The teeth were thermocycled 4,000 times between water baths held at 5°C and 55°C, and the specimens prepared and examined for microleakage using 2.0{\%} Procion Red{\circledR} dye, buffered at pH 7 as a marker. Results: Microleakage was significantly less around cavities restored with Cerana glass ceramic inserts than around cavities restored with Beta Quartz glass ceramic inserts or the control cavities at both the occlusal and gingival margins, p = 0.003 and p = 0.014, respectively. Comparisons of both occlusal and gingival margins within both test groups and the control group showed there was significantly less microleakage at the enamel-resin interface than at the dentine-resin interface (p < 0.05 in all cases) Conclusion: The results strongly suggest that restorations restored with Cerana glass ceramic inserts, which have a coefficient of thermal expansion approximating that of enamel, result in a decrease in marginal microleakage compared to Beta Quartz glass ceramic inserts and Tetric Ceram resin-based composite material.",
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