Development of a self-etch adhesive for resin-modified glass ionomers.
The favorable self-adhesiveness of resin-modified glass ionomers (RMGIs) might be even further improved if the time-consuming and technically sensitive etch-and-rinse pre-treatment step with polyalkenoic acids could be avoided. We undertook this study to assess the effectiveness of an experimental self-etch adhesive for RMGIs that does not need to be rinsed off. Ultrastructural analysis and micro-tensile bond strength testing to enamel and dentin of a RMGI restorative material and a RMGI adhesive were performed after 4 different surface pre-treatments: no conditioning; 25% polyalkenoic acid; an experimental self-etch adhesive; and 37.5% phosphoric acid followed by the experimental self-etch adhesive. The use of an experimental self-etch adhesive increased the bond strength of RMGIs, especially after an additional conditioning step. Interfacial analysis showed the formation of a thin hydroxyapatite-containing hybrid layer. The self-etch technique enhances the user-friendliness of RMGIs and lowers their technique-sensitivity, while maintaining desirable characteristics of the conventional etch-and-rinse approach with polyalkenoic acids.
Coutinho
E
E
Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, B-3000 Leuven, Belgium.
Van Landuyt
K
K
De Munck
J
J
Poitevin
A
A
Yoshida
Y
Y
Inoue
S
S
Peumans
M
M
Suzuki
K
K
Lambrechts
P
P
Van Meerbeek
B
B
D000134:Acid Etching, Dental / Q000379:methods*; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003737:Dental Cavity Preparation / Q000379:methods; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D017709:Fractals; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D066298:In Vitro Techniques; D008964:Molar, Third / Q000648:ultrastructure*; D013499:Surface Properties; D013718:Tensile Strength
D003188:Composite Resins; D005899:Glass Ionomer Cements