The author studied the age distribution, etiology, affected site and several radiographic features of periapical granulomas, cysts, and abscesses.
The material consisted of 928 films obtaind from the patients who wore diagnosed and treated and under the diagnosis of periapical granulomas, cysts, and abscesses during the past 8 years (1973~^1986) at th3 Infirmary of D3ntal School, Chosun University.
The obtained results were as follows:
1. The order of incidence was as follows: periapical abscess (67.2%), granuloma, and cyst.
2. The agdistribution rav-,aled the highest incidence around the age of 30 and relatively higli2r incidence ovor the age of 69 in th, cas of periapical abscess and granuloma.
3. In the frequency of location:
Periapical abscesses occured most frequently in the mandibular molars. Granulunias showed relatively higher incidence in maxilla than in mandible. Cysts were most common in the maxillary anterior teeth.
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