The effect of thermocycling on microleakage of several commercially available composite Class V restorations in vitro

Wahab, Fouad Kadim; Shaini, Firas J; Morgano, Steven M.

doi:10.1016/s0022-3913(03)00300-7

Cited by 89 publications

(73 citation statements)

References 18 publications

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“…In this study, spectrophotometer was used to assess the dye penetration because it allows volume of dye penetrated rather than two dimensional linear measurements [10]. Teeth were subjected to thermal stresses to simulate the temperature changes that take place in the oral environment [11].…”

Section: Discussionmentioning

confidence: 99%

Comparative Evaluation of Microleakage, Surface Roughness and Hardness of Three Glass Ionomer Cements – Zirconomer, Fujii IX Extra GC and Ketac Molar: An In Vitro Study

Asafarlal¹

2017

Dentistry

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Objective: To compare and evaluate microleakage, surface roughness and hardness of three glass ionomer cements -Zirconomer, Fujii IX Extra GC and Ketac Molar. Materials and methods:For microleakage evaluation, 150 extracted human maxillary permanent first premolars were randomly divided into five groups of 30 teeth each. Standardized class V cavity preparation was done on the buccal surface of all the groups except group 1. In group 2, cavity was prepared but left unrestored. Group 3, 4 and 5 were restored with Zirconomer, Fujii IX Extra GC and Ketac Molar respectively. Teeth were themocycled together for 500 cycles. All the samples were placed in 0.5% methylene blue for 24 hrs. Volumetric microleakage evaluation was done using spectrophotometer. For each material 15 samples were prepared, of which 10 samples were polished using Sof Lex discs. Samples were processed for surface roughness evaluation, 5 samples from each group before polishing & 5 samples after polishing. 5 samples from each group were processed for Vicker's hardness test.Results: All the five groups showed some amount of microleakage. Microleakage value of group 2 was greater followed by group 3, group 4, group 1 and group 5 respectively. Ketac Molar showed lower surface roughness value before & after polishing. Fujii IX Extra GC showed higher hardness followed by Ketac Molar and Zirconomer. Conclusion:No material was able to completely eliminate microleakage at cervical margin. Ketac Molar showed lower surface roughness before and after polishing. Fujii IX Extra GC showed high hardness among the materials tested.

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Section: Discussionmentioning

confidence: 99%

Comparative Evaluation of Microleakage, Surface Roughness and Hardness of Three Glass Ionomer Cements – Zirconomer, Fujii IX Extra GC and Ketac Molar: An In Vitro Study

Asafarlal¹

2017

Dentistry

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“…This process may highlight a mismatch in the thermal coefficient of expansion between the restoration and tooth structure (dentin), which results in different volumetric changes during temperature fluctuations, causing fatigue of the adhesive joint with subsequent microleakage. 64 The effect of thermocycling on resin composite restorations is controversial; some authors reported that it has a significant effect on microleakage, especially when the gingival margins of the preparation are located in dentin, 65 while others believe that thermocycling has an effect on microleakage only if the restorative material has a higher coefficient of thermal expansion (metallic restorations). 66 In the current study, all specimens were subjected to 3,000 cycles, which equates to a number of years of intraoral thermocycling.…”

Section: Groupsmentioning

confidence: 99%

Gingival Microleakage of Class II Resin Composite Restorations with Fiber Inserts

El‐Mowafy

El-Badrawy²,

Eltanty³

et al. 2007

Operative Dentistry

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Fiber inserts incorporated at the gingival floor of Class II composite restorations resulted in a significant reduction of microleakage scores as compared to restorations made without inserts. This may lead to a reduced incidence of recurrent caries. SUMMARYPurpose: This investigation evaluated the effect of glass and polyethylene fiber inserts on the microleakage of Class II composite restorations with gingival margins on root surfaces. Methods: Fifty-four intact molars were sterilized with Gamma irradiation and mounted in acrylic bases. Class II slot cavities were made on both proximal sides of each tooth (3 mm wide, 1.5 mm deep) with the gingival margin on the root surface. The teeth were divided into nine groups, according to the technique of restoration and type of bonding agent. Filtek P-60 (3M/ESPE) was used to restore all cavities. Two types of fiber inserts were used: glass fiber (Ever Stick, StickTech) and polyethylene (Ribbond-THM), with three bonding agents being employed: Scotch Bond Multipurpose (3M/ESPE), Clearfil SE Bond (Kuraray) and Xeno IV (Dentsply). In the experimental groups, 3 mm long fiber inserts were inserted into restorations at the gingival seat. The control groups had no fiber inserts. The restorations were made incrementally and cured with LED light (UltraLume5, Ultradent). The restored teeth were stored in water for two weeks, then thermocycled for 3,000 cycles (5°C and 55°C). The tooth surfaces were sealed with nail polish, except at the restoration margins. The teeth were immersed in 2% procion red dye solution, sectioned and dye penetration was assessed to determine the extent of microleakage

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“…They were then subjected to an artificial thermal aging challenge according to the ISO recommendations. [13][14][15] Briefly, 500 thermocycles were performed alternating immersion of the specimens in water baths with temperatures of 5ºC and 55ºC using a dwell time of 60 s. Teeth surfaces were then sealed with two layers of nail polish to prevent dye penetration, except for 1 mm around the restoration margins. Teeth were then immersed in 2% procion red dye solution (Pararosanilin, Imperial Chemical Industries, London, England) for 24 hours at 37ºC.…”

Section: Microleakage Evaluationmentioning

confidence: 99%

Gingival Microleakage of Class V Composite Restorations with Fiber Inserts

Ahmed

El-Badrawy²,

Kulkarni³

et al. 2013

The Journal of Contemporary Dental Practice

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Aim: This study investigated the effect of different fiber inserts (glass and polyethylene), bonding agents, and resin composites on the gingival margin microleakage of class V composite restorations. Materials and methods:Sixty premolars were sterilized and mounted in acrylic resin bases. Class V cavities were prepared buccally and lingually, 1 mm below the cementoenamel junction, comprising 12 groups (n = 10). In the experimental groups fiber inserts were cut and placed at the gingival seat, while the control groups had no inserts. Combinations of two composite materials, Filtek-Z250 and Filtek-LS (3M-ESPE), and four bonding agents, Clearfil SE bond (Kuraray) (C), Scotch Bond Multipurpose (3M-ESPE) (SB), Prime and Bond NT (Dentsply) (PB), and Filtek-LS (3M-ESPE) (LS) were used. Restorations were incrementally inserted and polymerized for 40s. Specimens were then stored in distilled water for 7 days and thermocycled for 500 cycles. Teeth surfaces were sealed with nail polish except for 1 mm around restoration margins and immersed in 2% red procion dye. Teeth were then sectioned buccolingually and dye penetration was assessed with five-point scale. Data were statistically-analyzed by Kruskal-Wallis, ANOVA and Tukey's tests ( = 5%).Results: Mean microleakage scores varied from 0.40 (Groups C, C with polyethylene, LS, LS with polyethylene) to 1.50 (SB). Conclusion:Different bonding agents led to differences in microleakage scores where C and LS showed significantly lower microleakage than PB. SB had highest mean microleakage score, however, incorporation of fibers resulted in significant reduction in microleakage.Clinical significance: Class V resin composite restorations bonded with a total-etch adhesive had a significant reduction in mean microleakage scores when glass or polyethylene fibers were placed at the gingival cavo-surface margin. In contrast, for two self-etch adhesive systems, the incorporation of fibers had no significant effect on mean microleakage scores.

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The effect of thermocycling on microleakage of several commercially available composite Class V restorations in vitro

Cited by 89 publications

References 18 publications

Comparative Evaluation of Microleakage, Surface Roughness and Hardness of Three Glass Ionomer Cements – Zirconomer, Fujii IX Extra GC and Ketac Molar: An In Vitro Study

Comparative Evaluation of Microleakage, Surface Roughness and Hardness of Three Glass Ionomer Cements – Zirconomer, Fujii IX Extra GC and Ketac Molar: An In Vitro Study

Gingival Microleakage of Class II Resin Composite Restorations with Fiber Inserts

Gingival Microleakage of Class V Composite Restorations with Fiber Inserts

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