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Published on: July 30, 2007
Ceramic-dentin bonding: effect of adhesive systems and light-curing units
Isil Cekic1, Gulfem Ergun, Lippo V J Lassila
1Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey. isilcekic@yahoo.com
The Journal of Adhesive Dentistry
|April 17, 2007
Summary
The total-etch adhesive system offers superior bonding to dentin compared to self-etching systems. Plasma arc (PAC) light-curing units combined with total-etch adhesives yield the highest bond strengths for leucite ceramic restorations.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Adhesive dentistry
Background:
- Leucite-reinforced ceramics are widely used in dental restorations.
- Achieving durable bonds between ceramic restorations and tooth structure is crucial for longevity.
- Various light-curing units and adhesive systems exist, each with unique polymerization characteristics.
Purpose of the Study:
- To evaluate the influence of different light-curing units (QTH, LED, PAC) and adhesive systems (total-etch vs. self-etching) on the bond strength between leucite ceramic and dentin.
- To compare the effectiveness of various curing modes within each light-curing unit type.
Main Methods:
- Human molars were prepared, and ceramic blocks were bonded to dentin using either a total-etch or self-etching adhesive system.
- Bonding was achieved with a dual-polymerizing resin luting cement.
- Polymerization was performed using Quartz-Tungsten Halogen (QTH), Light-Emitting Diode (LED), or Plasma Arc (PAC) light-curing units in specific modes.
- After thermocycling, microtensile bond strength (μTBS) was measured, and fracture surfaces were analyzed via SEM.
Main Results:
- Both adhesive systems (p < 0.001) and light-curing units (p = 0.015) significantly impacted bond strength.
- The total-etch system consistently demonstrated higher bond strength values across different curing units compared to the self-etching system.
- The PAC light-curing unit, in conjunction with the total-etch system (normal or ramp-curing mode), yielded the highest mean μTBS values.
Conclusions:
- The conventional total-etch adhesive system provides more reliable bonding to dentin than the self-etching system for leucite ceramic restorations.
- The combination of PAC light-curing technology and a total-etch adhesive system is recommended for optimal bonding performance.
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