Role of delayed light polymerization of a dual-cured composite base on marginal adaptation of class II posterior composite open-sandwich restoration.
Article
ي En
| IMSEAR
| ID: sea-141243
ABSTRACT
Objective:
To determine the effect of delayed light polymerization of a dual-cured composite base material on the marginal adaptation of class II composite restoration. Materials andMethods:
35 extracted human molar teeth were used to prepare class II mesio-occlusal or disto-occlusal slot preparations with gingival margins at the CEJ. The teeth were restored using an open-sandwich technique with a 2mm base increment of dual-cured composite, and divided into 5 groups based on the mode of the polymerization of the dual-cured composite base Group A - self-cured after placement (5 mins), Group B - light-cured immediately after placement, Group C - light-cured 30 seconds after placement, Group D - light-cured 60 seconds after placement, Group E - light-cured 120 seconds after placement. Then a top layer of a light-cured composite resin is placed to complete the restoration. The teeth were thermocycled and immersed in 1% aqueous solution of methylene blue for 24 hours. Sectioning of the teeth and scoring under stereomicroscope was done. Data will be statistically evaluated using the kruskal wallis 1-way ANOVA.Results:
Statistical analysis using kruskal wallis 1-way ANOVA showed that the dual-cured composite light polymerized 1 minute after placement exhibited the least microleakage.Conclusion:
Delayed light polymerization of the dual-cured composite base reduced the microleakage in class II open-sandwich restorations.Key words
النص الكامل:
1
الفهرس:
IMSEAR
الموضوع الرئيسي:
Temperature
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Time Factors
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Materials Testing
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Humans
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Dental Bonding
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Dentin-Bonding Agents
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Dental Marginal Adaptation
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Composite Resins
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Tooth Cervix
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Dental Cavity Preparation
اللغة:
En
السنة:
2012
نوع:
Article