Authors: Robinson HBG, Boling LR.
Title: An anachoretic effect in pulpitis. I. Bacteriological studies.
Journal: JADA
Date: Feb 1941
Citation: 28;268-82
Category: Endodontic Microbiology
Evidence-based Ranking: 5
Purpose/Objective: The paper studies the phenomenon of anachoresis in cat teeth.

Discussion: The paper discusses 4 series of experiments in which pulps of teeth were irritated and bacteria introduced into the blood stream. Cavities were prepared in selected cat’s teeth with efforts having the cavity as deep as possible without exposure. An irritant was applied to experimental teeth and were left open. Bacteria were injected into a vein of the hind leg a few minutes to 20 days after cavity preparation. The cats were then sacrificed and experimental and control pulps of the teeth were compared. The timing of the cavity preparation and actual bacteria injection were varied in the subsequent follow up experiments. 72 % of the pulps from 64 teeth operated upon were infected while only 8.5% of the control pulps showed bacteria by culture. Irritation of the pulp is known to result from several stimuli such as cavity preparation, application of filling material, thermal stimuli. Transient bacteremias may occasionally be present in normal healthy individuals and it is suggested that postoperative “idiopathic” pulpitis may be a result of anachoresis. The term “anachoretic pulpitis” is suggested for this pulpal inflammation.

Reviewer’s comments: This is a classic article stating that anachoresis occurs in the presence of pulpal inflammation and transient bacteremias. The term anachoretic pulpitis was coined.