CO2 laser dentin surface treatment most effectively increased ceramic shear bond strength
Ahmed El Gamal1, Etienne Medioni1, Jean Paul Rocca1
1Micoralis laboratoy EA 7354, University Côte d'Azur, Nice, France.
Laser Therapy
|May 26, 2018
Summary
CO2 laser irradiation significantly enhances resin cement bond strength to CAD/CAM ceramics. This laser treatment improves shear bond strength for both lithium disilicate and zirconia ceramics bonded to dentin.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Laser Dentistry
Background:
- Dental restorations often utilize CAD/CAM ceramics.
- Achieving durable bonds between resin cements and ceramics is crucial for restoration longevity.
- Surface treatments are employed to enhance adhesion.
Purpose of the Study:
- To evaluate the efficacy of CO2 laser irradiation compared to traditional methods (sandblasting, hydrofluoric acid, silane coupling agent) for improving resin cement bond strength to CAD/CAM ceramics.
- To assess the impact of CO2 laser treatment on the shear bond strength (SBS) of resin cement bonded to dentin using different ceramic materials.
Main Methods:
- Forty-eight CAD/CAM ceramic discs (lithium disilicate and zirconia) were prepared.
- Specimens were divided into four groups based on ceramic material and surface treatment: CO2 laser/hydrofluoric acid/silane, hydrofluoric acid/silane, CO2 laser/sandblasting/silane, and sandblasting/silane.
- Shear bond strength testing was performed to quantify adhesion.
Main Results:
- CO2 laser irradiation demonstrated a statistically significant increase in shear bond strength for zirconia ceramics compared to non-irradiated groups (p=0.039).
- The study indicated a positive effect of CO2 laser irradiation on bond strength for both ceramic types.
Conclusions:
- CO2 laser irradiation is an effective method for enhancing the shear bond strength of resin cement to CAD/CAM ceramics.
- This laser-based surface treatment offers a promising approach to improve the clinical performance and durability of dental restorations.
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