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[Efficacy of 4 adhesive systems for amalgam. In vitro study]
L Marigo1, G La Torre, A Manni
1Facoltà di Medicina e Chirurgia A. Gemelli, Università Cattolica del Sacro Cuore, Roma.
Minerva Stomatologica
|May 11, 2001
Summary
This study compared four dental adhesives for amalgam bonding. All-Bond 2 showed the highest shear bond strength, while Clearfil Liner Bond 2 had the lowest, with significant differences among all tested systems.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials Engineering
Background:
- Investigating the shear bond strength of four contemporary adhesive systems: All-Bond 2 (AB2), Clearfil Liner Bond 2 (CL), Scotchbond MP plus (SBMP), and High Q Bond plus (HQB).
- Evaluating the suitability of these adhesive systems for amalgam adhesion to dentin as claimed by manufacturers.
Purpose of the Study:
- To determine and compare the shear bond strength of four specific adhesive systems designed for amalgam bonding to dentin.
- To provide data for selecting appropriate adhesives in restorative dentistry, particularly for conservative restorations.
Main Methods:
- Forty extracted human third molars were prepared to expose flat dentin surfaces and randomly assigned to four groups.
- Each group was treated with one of the four adhesive systems following manufacturer instructions, followed by amalgam condensation.
- Amalgam cylinders were subjected to tensile bond testing using a Universal Testing Machine (Instron 4500), with ANOVA used for statistical analysis.
Main Results:
- Mean shear bond strength values (MPa) were recorded: All-Bond 2 (8.13 ± 1.48), Scotchbond MP plus (7.06 ± 1.41), High Q Bond plus (4.2 ± 1.06), and Clearfil Liner Bond 2 (3.04 ± 0.68).
- Statistical analysis (ANOVA) indicated significant differences in shear bond strength among the four adhesive systems (p < 0.05).
Conclusions:
- The tested dentin-enamel adhesive systems for amalgam exhibited lower bond strengths compared to those used for composite resins.
- These specific amalgam adhesives warrant consideration for conservative restorations requiring chemical retention support when mechanical retention is insufficient.