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High-Throughput Measurement and Classification of Organic P in Environmental Samples
Published on: June 8, 2011
Laboratory evaluation of phosphate ester bonding agents
M H Souza1, D H Retief, C M Russell
1Faculdade de Odontologia, Bauru, Brazil.
American Journal of Dentistry
|April 1, 1994
Summary
This study evaluated the bond strength of new phosphorus ester dentin bonding agents to various dental materials. Results showed promising shear bond strengths to enamel, dentin, and cast metal alloys, with low microleakage in restorations.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials Engineering
Background:
- Introduction of novel dentin bonding agents containing phosphorus esters.
- Assessment of bonding capabilities to diverse substrates including enamel, dentin, amalgam, cast metal alloys, and porcelain.
- Evaluation of microleakage in Class V restorations.
Purpose of the Study:
- To determine the shear bond strengths of Clearfil Photo Bond, Panavia, and Clearfil Porcelain Bond to various dental substrates.
- To quantify the microleakage of Class V restorations using these bonding agents.
- To assess the clinical applicability of these new bonding agents.
Main Methods:
- Determination of shear bond strengths to enamel, dentin, amalgam, amalgam-dentin, cast metal alloy, and porcelain.
- Quantitative microleakage evaluation of Class V restorations in cementum (dentin).
- Application of bonding agents according to manufacturer's instructions with a light-cured resin composite.
Main Results:
- Mean shear bond strengths (MPa): Enamel (A) = 24.15 ± 3.65, Dentin (B) = 11.30 ± 3.12, Amalgam (C) = 13.77 ± 3.42, Amalgam-Dentin (D) = 4.26 ± 0.92, Cast Metal Alloy (E) = 17.84 ± 3.19, Porcelain (F) = 13.45 ± 4.12.
- Quantitative microleakage (G) was 0.55 ± 0.34 mg dye/restoration.
- Varied bond strengths observed across different substrates.
Conclusions:
- The evaluated phosphorus ester-containing dentin bonding agents demonstrate varying degrees of bond strength to different dental materials.
- Low microleakage suggests potential for durable restorations.
- Further clinical evaluation is warranted to confirm long-term efficacy.
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