. Elementary and dental radiography . Fig. 157. Fig. 158. Fig. 157. An impacted lower third molar. The light area between the second and third molarsrepresents a destruction of bony tissue, arrow A. Arrow B points to a light area, which rei)re- sents the absorption of the second molar. (Radiograph by Blum, of New York City.)Fig. 158. An impacted upper third molar. The arrow points to a light area representingabsorption of the upper second molar. Notice the very poor filling encroaching on the pulp ofthe first molar and filling the interproximal space between the first and second molar. (Radio-
. Elementary and dental radiography . Fig. 157. Fig. 158. Fig. 157. An impacted lower third molar. The light area between the second and third molarsrepresents a destruction of bony tissue, arrow A. Arrow B points to a light area, which rei)re- sents the absorption of the second molar. (Radiograph by Blum, of New York City.)Fig. 158. An impacted upper third molar. The arrow points to a light area representingabsorption of the upper second molar. Notice the very poor filling encroaching on the pulp ofthe first molar and filling the interproximal space between the first and second molar. (Radio-graph by Ream, of Chicago.) In Fig. 158 the arrow points to a light area representing absorptionof the upper second molar, due to the pressure of the third molar againstit. A study of this radiograph gives the dental surgeon a good idea ofhow he should apply his force in extraction. Fig. 159 is a case of Dr. Cryers. I quote Dr. Cryer: Fig. 159shows an impacted, lower, third molar resting against the posterior rootof the second molar.
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