cured. If contamination is suspected, re-etching of the
surface for 20 seconds is indicated.
The sealant should be applied according to the
manufacturer's instructions. Care should be taken to
avoid entrapment of air bubbles, to extend the sealant
into all the grooves and pits, and to avoid extension of
the sealant onto unetched smooth surfaces or soft
tissues. The sealant must remain uncontaminated and
undisturbed until it is cured to hardness.
The sealant should be examined by yourself first,
and then check ed by a dentist to ensure that
underextension, overextension, undercuring, voids, and
high spots have not occurred. A reasonable attempt
should be made to remove the sealant to determine if
adequate bond strength has been established.
Fluoride should not be applied to the enamel
surface immediately before a sealant procedure is
initiated. Fluoride may be applied immediately after
The most common reason for sealant failure is
contamination of the etched surface with saliva or air-
line moisture (from the air syringe) or oil.