(a–c) SEM image of bone from the distal root-bone complex; (b) note: resorption pits (white arrows), blood vessel space (white stars); (c) high magnification of resorption pit. (d–f) SEM image of a root exhibiting heavy root resorption; (e) isolated pit in primary cementum; (f) larger resorption pit subdivided into smaller ones; note tubular structure of dentin in pits of (e) and (f). De = dentin, PC = primary cementum, and PDL = periodontal ligament.
