Why should a leaking restoration be replaced before the bleaching process is started?

Question

Quizplus · Accepted Answer

Leaking restorations should be replaced before the bleaching process is started to prevent excessive penetration of bleach through dentinal tubules that might irritate the pulp and cause sensitivity.Bleaching may be done as a prerestorative procedure to whiten the teeth before composite bonding procedures,veneers,or porcelain crowns.However,research has shown that bonding to newly bleached surfaces will be weaker than if the teeth are allowed to restabilize for a couple of weeks.

Why Should a Leaking Restoration Be Replaced Before the Bleaching