Figure 6

Tooth resorption in the hadrosaurid dental battery (UALVP 56336), all in transverse view. (a) an asymmetrically resorbed tooth; (b) a symmetrically resorbed tooth; (c) magnified view of asymmetrically resorbed tooth; (d) half resorbed tooth; (e) magnified image of the box in (d). Black arrows indicate direction of resorption. ab/rc, alveolar bone or repair cementum; ac, acellular cementum; cc, cellular cementum; cpc, collapsed pulp cavity; de, dentine; en, enamel; pds, periodontal space; rl, reversal line; sf, Sharpey’s fiber.