Sten Persson

TL;DR: The microbial flora in canals after failed endodontic therapy differed markedly from the flora in untreated teeth, and infection at the time of root filling and size of the periapical lesion had a negative influence on the prognosis.

TL;DR: This study investigated the role of infection on the prognosis of endodontic therapy by following-up teeth that had had their canals cleaned and obturated during a single appointment, highlighting the importance of completely eliminating bacteria from the root canal system before obturation.

TL;DR: Findings significantly increase the list of oral bacteria known to produce volatile sulfur compounds as well as some members of the genera Fusobacterium, Bacteroides, Porphyromonas and Eubacterium.

TL;DR: In 12 species of Fusobacterium the following characteristics were studied; the desulfhydration of L-cysteine and L-methionine by resting cell suspensions, the formation of alpha-keto-acids from L- Cysteine, D-cy Steine andL-mETHIONine by cell extracts, and the formationof hydrogen sulfide from L, D and L by cell extracting separated by polyacrylamide gel electrophoresis

TL;DR: In most of the reaction mixtures hydrogen sulfide reached highly toxic levels, but also methyl mercaptan was formed in significant amounts.