by David
A. Hall, D.D.S.
To perform effective restorative procedures with bonding technology
requires absolute moisture control. Even the slightest contamination by
blood or gingival fluid will ruin your bonding procedure.
For procedures
such as bonding porcelain veneers or all-porcelain crowns, the use of
retraction cord is almost imperative. But for that extra measure of
assurance, use Superoxol (30% hydrogen peroxide). Retraction cord will not
completely eliminate contamination of the operating field in every
circumstance. Sometimes it appears that isolation has been achieved, and
then the application of an etching solution or self-etching agent
irritates the tissue enough that contamination occurs. Especially in cases
where there is moderate gingival inflammation, bleeding or oozing of the
tissue may occur in spite of the skillful use of retraction cord.
However, Superoxol, applied to the soft tissue, will nearly always
eliminate any oozing or bleeding of that tissue for about ten minutes.
While the mechanism of action of Superoxol on the soft tissue has not, to
my knowledge, been thoroughly investigated, it appears that the
concentrated hydrogen peroxide releases small oxygen bubbles in the
tissues, occluding any vessels and thus preventing the oozing or bleeding.
Some operators have theorized that the Superoxol "burns" the tissue, but
this is not the case.
I advocate the use of Superoxol immediately prior
to applying the first etching or self-etching agent to the tooth whenever
the bonding of porcelain
veneers or all-porcelain crowns or
onlays is attempted. Bleeding and oozing will be stopped for about ten
minutes in all cases except when there is severe gingival inflammation.
Superoxol use is also advisable for the placing of class V restorations
and any composite bonding procedure where gingival oozing could threaten
contamination of the bond.
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The use of Superoxol in a direct bonding case:
www.aacd.com/journal/pdf/21-3finley.pdf
