Figure 1. Light microscopic view of human gingiva (from a young, clinically healthy subject) illustrating its dimensions and relations. ABC, alveolar bone crest; AEFC, acellular extrinsic fiber cementum; CEJ, cemento-enamel junction; CT, gingival connective tissue; D, dentin; ES, enamel space; GM, gingival margin; JE, junctional epithelium; OGE, oral gingival epithelium; OSE, oral sulcular epithelium; PL, periodontal ligament. Courtesy of Dr. H.E. Schroeder.