SEM examination of secondary dentine under and opposite cervical carious lesions.

The deposition of calcified secondary dentine underlying carious lesions and on the wall opposite to the carious lesions was examined in this study. Twenty single rooted human teeth were used in this work. The teeth were cleaned and fractured into two longitudinal halves, which were examined under a scanning microscope. The results showed complete disappearance of the dentinal tubules, globular mineralized deposits, and mineralized deposits of fibrous morphology underlying carious lesions, while on the dentinal walls opposite to the carious lesions were calsospherites, mineralized secondary dentine, and typical deposition of secondary dentine.