Abstract:
:Besides micro-mechanical interlocking through hybrid-layer formation, self-etch adhesives may benefit from additional chemical interaction between the functional monomer and residual hydroxyapatite. One-step adhesives are commonly associated with lower bonding effectiveness, which must be attributed in part to the dissolution of hydrophilic and hydrophobic monomers in a relatively highly concentrated solvent. In this 'difficult' mixture, also water is essential as ionization medium to enable self-etching activity. Due to the high hydrophilicity, one-step self-etch adhesives have been reported to behave as semi-permeable membranes, allowing fluids to pass through and seriously jeopardizing bond durability. Recent research has also revealed that HEMA-free one-step adhesives are prone to phase-separation, which may also account for their lower bonding effectiveness. Employing an appropriate air-drying technique may, however, improve the bonding effectiveness of such phase-separating adhesives by getting rid of substantially more interfacial water than HEMA-containing adhesives, of which water might be more difficult to remove from.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Van Meerbeek B,Van Landuyt K,De Munck J,Hashimoto M,Peumans M,Lambrechts P,Yoshida Y,Inoue S,Suzuki Kdoi
10.4012/dmj.24.1keywords:
subject
Has Abstractpub_date
2005-03-01 00:00:00pages
1-13issue
1eissn
0287-4547issn
1881-1361journal_volume
24pub_type
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