Page 179 - Handbook of Adhesion Promoters

172 Selection of Adhesion Promoters for Different

8.27 PORCELAIN

The carbon dioxide laser irradiation and silane coupling agent were used to improve adhe-
1
sion of composite to porcelain. Without primer treatment, adhesive joints failed adhe-
1
sively before reaching the end of the thermal cycling period. The specimens irradiated
with carbon dioxide laser after primer treatment had higher shear bond strengths before
1
and after thermal cycling than those treated with primer only. A combined surface treat-
ment which involved silane application followed by laser treatment was the best method
1
of adhesion enhancement.
A UV curable acrylate adhered to an acrylated silane primer (e.g., 3-methacryloxy-
propyltrichlorosilane) having terminal halogen group with the silane primer being adhered
2
to a siliceous surface. Strong chemical bonds are formed between the primer and the sili-
2
ceous surface as well as between the primer and the UV curable coating.
REFERENCES
1 Chen, J-R; Oka, K; Kawano, T; Goto, T; Ichikawa, T, Dental Mater. J., 29, 6, 731-7, 2010.
2 Upadhyaya, A; Castro, S; Rao, MKK, US20140050917, Nanofilm Ltd., Feb. 20, 2014.