Histobacteriologic Conditions of the Apical Root Canal System and Periapical Tissues in Teeth Associated with Sinus Tracts

D. Ricucci et al, JOE 44:3 pp405-413, March 2018
Chronic apical abscess (chronic apical periodontitis) or what those of us who trained at Boston University under the legendary Dr. Herbert Schilder term a lesion of endodontic origin (LEO), is a variation of apical periodontitis caused by a root canal infection that has resulted in an …

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