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Does Post-etching Cleaning Influence Bond Strength of Lithium Disilicate Laminate Veneers?
Ana Paula Rodrigues Magalhães1, Rafael Almeida Decurcio1, Gerardo Patricio Durán Ojeda2
1Professor of Operative Dentistry, Brazilian Dental Association, Goiânia, Brazil.
Compendium of Continuing Education in Dentistry (Jamesburg, N.J. : 1995)
|May 2, 2017
Summary
Thorough air/water washing effectively cleans lithium disilicate ceramic surfaces after etching, ensuring successful bonding for dental veneers. This practical method removes residue without damaging the material, crucial for long-term restoration success.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Ceramic Restorations
Background:
- Lithium disilicate (LD) is a preferred material for all-ceramic dental restorations, particularly veneers, due to its favorable mechanical and aesthetic properties.
- Successful cementation of indirect restorations relies heavily on the surface preparation of the ceramic, especially after etching with hydrofluoric acid and silane application.
- Residual subproducts from etching can precipitate on the ceramic surface, potentially compromising the bond strength with resin cements.
Observation:
- This study investigated the efficacy of different post-etching cleaning protocols on lithium disilicate ceramic surfaces using scanning electron microscopy and energy dispersive x-ray spectroscopy.
- Three common cleaning techniques were evaluated: air/water spray (30 seconds), 37% phosphoric acid (60 seconds), and ultrasonic bath (4-10 minutes).
- Analysis revealed that thorough washing with air/water spray effectively removed surface residue without causing material damage.
Findings:
- The air/water spray cleaning protocol was found to be the most effective in removing post-etching residues from lithium disilicate ceramic surfaces.
- This method demonstrated superior residue removal compared to phosphoric acid or ultrasonic bath treatments, while preserving the ceramic integrity.
- Clinical application of this cleaning protocol in laminate veneer cases showed successful outcomes after 18 months.
Implications:
- The findings suggest that simple and practical air/water washing is a reliable method for preparing lithium disilicate ceramic surfaces for cementation.
- This protocol can enhance the predictability and longevity of all-ceramic dental restorations, particularly laminate veneers.
- Further research could explore long-term clinical performance across diverse patient populations and varying etching conditions.
