Appeal No. 95-2165 Page 2
Application
This is an appeal under 35 U.S.C. § 134 from the final
rejection of claims 1 through 10, all of the claims in the
application.2
THE INVENTION
Appellants invention is directed to a dental adhesive
system comprising an adhesive component and a plasticizer
having the characteristics of low vapor pressure at a
temperature of an oral cavity, low solubility with water and
saliva, and low toxicity in amounts used in the adhesive.
THE CLAIMS
Claim 1 is illustrative of appellant’s invention and is
reproduced below.
1. A dental adhesive system which permits easier removal
of ceramic brackets from an enameled tooth surface comprising:
(a) an orthodontic adhesive curable without the
application of any supplemental heat, which bonds a ceramic
bracket to the enameled tooth surface; and
(b) a plasticizer added to the orthodontic adhesive which
promotes a ductile failure mechanism within the adhesive rather
than a brittle mechanism when debonding the ceramic bracket,
the plasticizer having a low vapor pressure at a temperature of
2Two amendments after final under 37 C.F.R. § 1.116 were
presented by appellants, on March 30, 1994 and May 20, 1994.
Neither amendment was entered by the examiner. See the
advisory actions dated April 20, 1994 and June 10, 1994
respectively.
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