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Fin. r.O. Th«* wc.l^'o-shapi'tl an^as of nosioii, of llic " keiUnnnitfo drfrcte " of German authovs.
An excellent example of that form of erosion in which a wedge-shaped piece is removed. In this case
the thin edge of the wedge is toward the gingival margin. Only the lower teeth are eroded. Patient,
a woman about forty years of age.
FiQ. 51. A modification of the wedge-shaped areas of erosion in which the bottom of the cut ia
well rounded instead of a sharp angle. This form is frequent in the bicuspids and first molars.
Patient, a man thirty-five years of age. No other erosion had occurred in the mouth.
61)
