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Home Comparison of microleakage of different margin types around Class V resin...

Comparison of microleakage of different margin types around Class V resin restorations in primary teeth

Authors:

  • T. C. LopesCoutinho
    Department of Paediatric Dentistry, School of Dentistry, Fluminense Federal University, Niteri, Rio de Janeiro, Brazil
  • M. AlmeidaTostes
    Department of Paediatric Dentistry, School of Dentistry, Fluminense Federal University, Niteri, Rio de Janeiro, Brazil

ABSTRACT


Aim

This in vitro study compared the effect of a concave with a straight-bevelled cavity margin on the microleakage of Class V composite resin restorations in primary teeth.

Methods

Standardised Class V cavity preparations were made in vitro on the buccal (all margins placed in enamel) and on the lingual (margins placed in enamel and cementum) surfaces of 20 sound primary molars. The teeth were randomly assigned to two groups of 10 each: in Group 1, a concave bevel was made with a high-speed No. 04 tungsten carbide bur and in Group 2, a straight bevel was made with a high-speed No. 556 tungsten carbide bur. The teeth were restored incrementally with Adper Single Bond 2 (3M) adhesive and Filtek Z 350 (3M) composite resin. All specimens were subsequently thermocycled and immersed in 50 silver nitrate solution. Microleakage of the restorations was then assessed by silver penetration. A grading scale of 0 to 4 was used as the scoring criterion.

Results

At the enamel margins no statistically significant differences were observed between the two groups (p>>0.05). Occlusal walls in enamel, in both groups, exhibited less leakage than the cervical walls in cementum (p<0.01) and Group 1 showed better results than Group 2 in decreasing microleakage at the cementum margins (p <0.05).

Conclusion

Based on the results, it was concluded that concave-beveled cavity preparations may reduce but did not totally eliminate microleakage at the cementum margins of Class V composite resin restorations in primary teeth.

PLUMX METRICS

Publication date:

Sep /2013

Keywords:

adhesion, microleakage, primary teeth

Issue:

Vol.14 – n.3/2013

Page:

246 – 251

Publisher:

Ariesdue

Cite:


Harvard: T. C. LopesCoutinho, M. AlmeidaTostes (2013) "Comparison of microleakage of different margin types around Class V resin restorations in primary teeth", European Journal of Paediatric Dentistry, 14(3), pp246-251. doi:
Vancouver: T. C. LopesCoutinho, M. AlmeidaTostes. Comparison of microleakage of different margin types around Class V resin restorations in primary teeth. European Journal of Paediatric Dentistry [Internet]. 2013Sep.1 [cited 2025May.15];14(3):246-251. Available from: https://www.ejpd.eu/abstract-pubmed/comparison-of-microleakage-of-different-margin-types-around-class-v-resin-restorations-in-primary-teeth/
MLA: T. C. LopesCoutinho, M. AlmeidaTostes Comparison of microleakage of different margin types around Class V resin restorations in primary teeth. European Journal of Paediatric Dentistry. 2013;14(3):246-251

Copyright (c) 2021 Ariesdue

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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