See yesterday’s most popular searches here. Root canals with apparently adequate treatment usually contain 1—5 species, while the number of species in canals with inadequate treatment can reach up to 30 species, which is very similar to primary infections 20 , 98 — Community profiles are essentially determined by species richness and abundance. All these findings indicate that the microbiota of root canal-treated teeth with apical periodontitis is more complex than previously anticipated by culture studies. Features of the microbiota in different conditions Microbial diversity in endodontic infections has been consistently assessed by anaerobic culturing and culture-independent molecular biology methods.

Detected taxa included P. No single species has been significantly found to persist after treatment procedures. On the other hand, previous culture and microscopic studies have failed to detect microorganisms in some cases of root canal-treated teeth with persistent disease 99 , , , In terms of bacterial density, a treated canal associated with post-treatment disease can harbor 10 3 —10 7 cells 39 , , Clone library analyses of primary endodontic infections reveal that a significant proportion of the detected taxa consist of phylotypes that remain to be cultivated and phenotypically characterized 26 ,

It is reasonable to realize that disease severity, based on intensity of signs and symptoms, or response to treatment may be related to the bacterial community composition.

The Association of Statin Intake and Healing of Apical Periodontitis After Root Canal Treatment

Gram-positive bacteria are more frequently present and include Streptococcus species, P. Are dental diseases examples of ecological catastrophes? Parvimonas micra Dialister spp. Two calibrated endodontists assessed outcomes blinded to preoperative status. The fact that E. Interspecies interactions within oral microbial communities.


dissertation apical periodontitis

Bacterial reduction in infected root canals treated with 2. Factors associated with endodontic treatment failures.

Cytomegalovirus and Epstein-Barr virus are associated with symptomatic periapical pathosis. Abstract Microorganisms infecting the dental root canal system play an unequivocal role as causative agents of apical periodontitis. Several culture-difficult species have been consistently included in the set of candidate endodontic pathogens only after the advent of perriodontitis techniques for bacterial identification.

Search for dissertations about: “apical periodontitis”

Clinical, radiographic, and histologic study of endodontic treatment failures. Root fragments were cryogenically ground and used for analysis.

Phylogenetic analysis of bacterial and archaeal species in symptomatic and asymptomatic endodontic infections. Association of Enterococcus faecalis with different forms of periradicular diseases.

Therefore, culture results have been considered as surrogate endpoints for long-term treatment outcome.

Distinctive features of the microbiota associated with different forms of apical periodontitis

On bacteria Persisting Root Canal Treament. The size of the apical periodontitis lesion has been shown to be proportional to the number of bacterial species and cells in the root canal 230 Primary infections are conspicuously dominated by anaerobic bacteria organized in a mixed community.

Epidemiological Aspects on Apical Periodontitis. Spirochetes comprise another bacterial group that has been shown to have as-yet-uncultivated representatives in primary infections. Profiling of root canal bacterial communities associated with chronic apical periodontitis from Brazilian and Norwegian subjects.

Distinctive features of the microbiota associated with different forms of apical periodontitis

Strengthening of the association with apical periodontitis of some species previously recognized as candidate pathogens has also become evident by molecular findings. Identification of bacteria in acute endodontic infections and their antimicrobial susceptibility.


Bacteriology of dental abscesses of endodontic origin.

dissertation apical periodontitis

Patients who self-reported statin use during the treatment and patients who reported never taking statins were included. While an acute abscess is usually preceded by acute apical periodontitis, the latter does not necessarily evolves to the former.

Dark-field observation of the bacterial distribution in root canals following pulp necrosis. Molecular biology methods have caused a great impact in the knowledge of the bacterial diversity in endodontic infections The systemic involvement of endodontic bacteria as part of the total oral infectious burden or through bacteremia following treatment or acute disease remains to be investigated in the light of current scientific concepts and technology.

Alternatively, identification apial pathogen patterns related to disease may allow development of tests for rapid diagnosis disserhation selected target species. Fisher’s Exact Test FET showed a significant difference in healing at the two-year or greater follow-up in patients taking statins compared to those who did not Selected endodontic pathogens in the apical third of infected root canals: However, a recent study using a histobacteriologic technique managed to detect bacteria in virtually all cases of post-treatment disease

dissertation apical periodontitis