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Precision & Accuracy in the Management of Periapical Lesions During the Focal Infection Era.

While the vast majority of teeth displaying a periapical lesion were extracted due to the overwhelming emphasis on their contribution to systemic disease during the Focal Infection era, some clinicians opted to retain these teeth using both nonsurgical and surgical root canal procedures. The main concern was the elimination of the "infected area" noted on teeth that displayed discernible periapical lesions. One such approach used a surgical trephination procedure that was done with precision due to the development of an instrument to facilitate an accurate access to the periapical lesion-called the Apicolocater.