Page 489 - My FlipBook

Fio. 174.

Fio. 175.

Fia. 176.

Figs. 174-176. Diagr-inimatic representation of a condition whicli occasionally occurs, when,
because of pathological conditions about the apex of the root of a deciduous incisor, absorption of the
root fails. Figure 174. The permanent incisor moves downward and forward to assume its position
in the arch and strilics the lingual surface of the root of the deciduous tooth near its apex. Figure
175. In the continued movement of the permanent incisor the apex of the root of the deciduous tooth
is tipped to the labial and pushed through the gum tissues under the lip. AVhon this is allowed to
continue, a condition shewn in Figure 176 is li.ablc to occur, in which the apex of the root of the
deciduous tooth gradually works its way into the lip itself, resulting in suppuration.