Scanning electron microscopic study of root surfaces of non-vital human teeth

Abstract

We observed the root surfaces of non-vital human teeth using a scanning electron microscope, and attempted to determine the relationship between root surface conditions, clinical symptoms, radiographic signs, and the status of canal obturation. Forty-eight non-vital human teeth extracted from subjects between 21 and 74 years of age were used examined. Numerous resorption lacunae were observed in the roots or teeth that had a history of discomfort. These lacunae showed smooth surface floors and sharp peripheral ridges. Cementum resorption was also observed in the roots of teeth that had no discomfort, and many of the lacunae had numerous fine particles or fiber like components on the floor or peripheral ridges.