Dentistry – Orthodontics – Bracket
Patent
1989-08-03
1990-08-14
Millin, V.
Dentistry
Orthodontics
Bracket
427379, 428429, 156326, 433 8, A01N 102, A61C 300
Patent
active
049483668
ABSTRACT:
Ceramic orthodontic brackets are bonded to teeth with dental adhesive. Each bracket has a silica-containing layer on the tooth facing base of the bracket. A silanation layer is also applied to the base. The silanation layer is deposited from a solution containing a first silane coupling agent reactive with organic resin in the adhesive and a second silane coupling agent having a non-reactive orgainc group. Collectively the silanes occupy all of the silanation sites on the silica-containing substrate. By controlling the ratio of reactive and non-reactive silane coupling agents, the bond strength between the substrate and the adhesive can be controlled. A set of ceramic orthodontic brackets can have uniform force of removal by varying the porportions of silane coupling agents on the brackets.
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Gille Henrick K.
Horn Jerold S.
Christoff James D.
Kirn Walter N.
Millin V.
Sell Donald M.
Unitek Corporation
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