Premium
Investigation of fast‐setting acrylic adhesives for bonding attachments to human tooth surfaces
Author(s) -
Snyder William H.,
Wilson Charles E.,
Newman George V.,
Semen John
Publication year - 1967
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1967.070110813
Subject(s) - adhesive , materials science , wetting , methyl methacrylate , methacrylate , copolymer , benzoyl peroxide , acrylic resin , monomer , bond strength , composite material , acrylic acid , polymer , immersion (mathematics) , polymer chemistry , coating , mathematics , layer (electronics) , pure mathematics
Some of the problems encountered in adhesive bonding of plastic attachments to human tooth surfaces were investigated. Acrylic adhesives based on poly(methyl methacrylate)–methyl methacrylate monomer mixtures with benzoyl peroxide initiation and N , N ‐dimethylaniline acceleration were utilized. Both homopolymers and copolymers were investigated. Recently extracted upper central incisors were employed in the bonding experiments. Bond strengths were improved by pretreating the tooth surfaces with mineral acids such as H 3 PO 4 . Surface wetting by the liquid adhesive was shown to be improved by the acid treatment. The molecular weight of polymer or copolymer employed in the liquid adhesive had an important effect on bond strengths. The optimum molecular weight for obtaining maximum bond strengths was around 20,000 g./mole. Water immersion of the bonded specimens at 37°C. for periods up to 6 weeks had a deleterious effect on bond strengths. Nevertheless, it was shown that some of the adhesives formed reasonably strong bonds for periods exceeding 6 months even with water immersion.