Micromorphologic features of cervical erosion after acid conditioning and its relation with composite resin.

The dentin surface in cervical erosion appears relatively smooth with evidence of intratubular deposits. After acid conditioning, the tubules are made patent though some still contain relatively less soluble intratubular contents. Resin applied to acid-conditioned, eroded dentin penetrated approximately 30 micrometers compared to more than 100 micrometers into the tubules of similarly treated normal dentin.