Do new matrix formulations improve resin composite resistance to degradation processes?
Andrea Soares Quirino da Silva Fonseca1, Kátia Maria da Fonseca Gerhardt, Gisele Damiana da Silveira Pereira
1Universidade Veiga de Almeida, School of Dentistry, Clinic Department, Rio de JaneiroRJ, Brazil.
Three new dental material formulations were tested for degradation resistance against traditional ones. None of the new silorane-, Ormocer-, or dimer-acid-based materials showed improved degradation resistance compared to dimethacrylate-based materials.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Dental restorative materials are crucial for oral health.
- Traditional dimethacrylate-based materials are widely used but can degrade over time.
- Newer formulations aim to improve material properties and longevity.
Purpose of the Study:
- To evaluate the degradation resistance of novel silorane-, Ormocer-, and dimer-acid-based dental materials.
- To compare the performance of these new formulations against conventional dimethacrylate-based materials.
- To assess water sorption, solubility, Knoop hardness, and flexural strength after ethanol exposure.
Main Methods:
- Investigated one silorane-, one Ormocer-, one dimer-acid-, and two dimethacrylate-based materials.
- Determined water sorption and solubility after 28 days of water immersion.
- Measured Knoop hardness before and after 24-hour ethanol immersion.
- Assessed flexural strength after dry storage and ethanol immersion using a bending test.
- Statistical analysis included ANOVA and Tukey's test.
Main Results:
- New formulations exhibited lower water sorption than dimethacrylate materials.
- Silorane- and dimethacrylate materials showed the lowest water solubility.
- All tested resins demonstrated reduced Knoop hardness after ethanol immersion.
- Flexural strength of Ormocer-, dimer-acid-, and one dimethacrylate material was negatively impacted by ethanol exposure.
- The novel formulations did not outperform traditional materials in degradation resistance.
Conclusions:
- The investigated silorane-, Ormocer-, and dimer-acid-based dental materials did not demonstrate superior degradation resistance compared to traditional dimethacrylate-based materials.
- Further research is needed to develop dental composites with enhanced durability and resistance to environmental degradation.
- Material selection should consider the specific clinical application and potential for hydrolytic and solvent-induced degradation.
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