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Issue: When tack curing any resin cement for too long (more
than 2-3 seconds) there are instances where marginal ditching may occur if the
cement becomes somewhat brittle and breaks off during clean-up.
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Recommendation: Light curing the
area for no more than two seconds prior to clean-up can greatly reduce the occurrence
of marginal ditching.
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Recommendation: From
restorations:
Excess cement is best removed after brief light exposure (approximately 2 seconds)
OR after 2 minutes from the start of the mix. After excess removal the margins
should be thoroughly light cured for 20 seconds per surface.
If excess cement is removed immediately with a sponge pellet or similar implement
after the restoration is seated, the remaining minimal excess cement should be
light-cured briefly or covered with glycerin gel to prevent the oxygen-inhibited
layer from forming and to reduce the possibility of marginal ditching. |
