Post-operative sensitivity may be caused by incorrect bonding techniques, but has become less significant with the introduction of self-etch adhesives, which are less technique sensitive than the traditional etch-and-rinse adhesives.
Sensitivity can be caused by:
- Over etching dentin (with Phosphoric Acid)
- Under priming of dentin
- Over aggressively air thinning the adhesive, with excessive air pressure
In addition, the application of a calcium silicate liner such as TheraCal LC on deep dentin can eliminate post-operative sensitivity due to its ability to seal dentin & act as a thermal insulator.