BISCO Bite Episode 13: The Smear Layer


In episode 13 of our BISCO Bite series, we discuss what the smear layer is. The smear layers consist of calcific debris that is produced when dentin enamel and cementum are instrumented. In total-etch bonding, the smear layer is removed with phosphoric acid, leaving freshly cut exposed dentinal tubules for bonding. In self-etch bonding the smear layer is kept and incorporated to the adhesive. When the smear layer mixes with the adhesive, the pH of the adhesive becomes neutralized and allows for a better bond. To learn more visit us at