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Flowable Glass Ionomer Cement as a Liner: Improving Marginal Adaptation of Atraumatic Restorative Treatment Restorations

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Purpose: The present study aims to evaluate the in vitro microleakage of two layers GIC proximal restorations in primary molars.

Methods: Forty primary molars received proximal cavity preparations and were randomly divided in two groups. G1 was restored with a regular powder/liquid ratio GIC. G2 firstly received a flowable layer of GIC and secondly a regular GIC layer. After 24h water storage (37°C), the teeth were made impermeable with the exception of the restoration area and 1 mm of their surrounding, immersed in 0.5% methylene blue solution (4h), rinsed and sectioned mesio-distally. One side was polished and analyzed under light microscope. Replicates from the other side were observed under SEM. Microleakege evaluation was carried out by 3 evaluators.

Results: The data analysis (Mann-Whitney) showed a significant (P<0.01) better result for G2. Regarding the SEM evaluation, irregularities were observed in the G1 at the tooth/GIC interface. For G2, it was not possible to observe any displacement of the GIC in relation to the tooth structure, which confirmed better adaptation as seen in the microleakage test.

Conclusion: the insertion of a flowable GIC layer in proximal cavities before the insertion of a regular GIC layer improves the material adaptation to the tooth.
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Keywords: DENTAL MATERIALS/BIOMATERIALS; GLASS IONOMER CEMENT; PREVENTIVE DENTISTRY; RESTORATIVE DENTISTRY

Document Type: Research Article

Affiliations: 1: Department of Pediatric Dentistry, Academic Centre for Dentsitry Amsterdam (ACTA), Amsterdam, The Netherlands 2: Department of Pediatric Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil

Publication date: January 1, 2010

More about this publication?
  • Acquired after the merger between the American Society of Dentistry for Children and the American Academy of Pediatric Dentistry in 2002, the Journal of Dentistry for Children (JDC) is an internationally renowned journal whose publishing dates back to 1934. Published three times a year, JDC promotes the practice, education and research specifically related to the specialty of pediatric dentistry. It covers a wide range of topics related to the clinical care of children, from clinical techniques of daily importance to the practitioner, to studies on child behavior and growth and development. JDC also provides information on the physical, psychological and emotional conditions of children as they relate to and affect their dental health.
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