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Dye staining gap test: an alternative method for assessing marginal gap formation in composite restorations.
Roberta Caroline Bruschi Alonso1, Gisele Maria Correr, Leonardo Gonçalves Cunha
1Dental Materials Area, Department of Restorative Dentistry, Piracicaba Dental School, UNICAMP, Piracicaba, SP, Brazil. robalonso@yahoo.com
Acta Odontologica Scandinavica
|July 1, 2006
Summary
Dye staining reliably assesses marginal gaps in composite restorations, showing similar results to scanning electron microscopy (SEM) analysis. This method is effective for evaluating composite restoration quality.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Microscopy
Background:
- Marginal adaptation is crucial for the longevity of composite restorations.
- Accurate assessment methods are needed to evaluate gap formation in dental fillings.
Purpose of the Study:
- To compare the efficacy of dye staining and scanning electron microscopy (SEM) in evaluating marginal adaptation of composite restorations.
- To assess the reliability of dye staining as a diagnostic tool for gap formation.
Main Methods:
- Bovine incisors with prepared cavities were restored with Filtek Z250 or Filtek Flow composite resins.
- Marginal adaptation was evaluated using SEM analysis and a dye staining method.
- Gap formation was quantified and statistically analyzed using two-way ANOVA and Pearson correlation.
Main Results:
- Both SEM and dye staining showed comparable gap percentages for Filtek Flow (36%, 34%) and Filtek Z250 (27%, 29%).
- No significant difference was found between the two composite materials regarding gap formation.
- A strong positive correlation (r=0.83) was observed between SEM and dye staining results.
Conclusions:
- Dye staining is a reliable and effective method for evaluating gap formation in composite restorations.
- The findings support the use of dye staining as a practical alternative to SEM for assessing marginal integrity.