Microbiological status of root-filled teeth with apical periodontitis

Molander,; Reit,; Dahlen,; Kvist,

doi:10.1046/j.1365-2591.1998.00111.x

Cited by 401 publications

(663 citation statements)

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“…Because of such a feature, they have been found associated with serious human infectious diseases, with increased morbidity and mortality (16,17). Pseudornonas and enterococci species have also been involved in some persistent and therapy-resistant endodontic infections (15,18,19).…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial Activity and Flow Rate of Newer and Established Root Canal Sealers

Siqueira¹,

Favieri²,

Gahyva³

et al. 2000

Journal of Endodontics

157

122

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Endodontic sealers that possess both optimum flow ability and antimicrobial properties may theoretically assist in the elimination of microorganisms located in confined areas of the root canal system. The antimicrobial effects and the flow rate of the following sealers were investigated and compared: Kerr Pulp Canal Sealer EWT, Grossman's Sealer, ThermaSeal, Sealer 26, AH Plus, and Sealer Plus. The agar diffusion test was used to assess the antimicrobial activity of the sealers. In the flow assay, the sealers were placed between two glass slabs and a weight of 500 g was placed on the top of the glass. The diameters of the formed discs were recorded. All root canal sealers tested showed some antimicrobial activity against most of the microorganisms. There were no significant differences between the materials tested (p > 0.05). All root canal sealers also flowed under the conditions of this study. Statistical analysis of the results revealed that AH Plus and Kerr Pulp Canal Sealer EWT had flow values significantly superior to the other sealers tested (p > 0.05). Taken together, these findings suggest that these sealers have the potential to help in the microbial control in the root canal system.Endodontics is essentially a clinical discipline concerned with the prevention and control of the root canal infection. Cleaned and shaped root canals must be three-dimensionally filled, eliminating the empty space, which has the potential to be infected or reinfected. In addition, by creating a fluid-tight apical, lateral, and coronal seal, root canal fillings may confine residual initants within the root canal system, impeding their egress to the periradicular tissues. A fluid-tight seal of the root canal system also prevents both coronal recontamination by saliva and seeping of periradicular tissue fluids into the root canal, denying a nutrient supply to the remaining microorganisms. Therefore, root canal obturation plays an important role in both the prevention and control of endodontic infections (1).Most root canal filling techniques use core materials associated with endodontic sealers. Core obturating materials, such as guttapercha, usually occupy space, whereas the endodontic sealers enhance the possible attainment of an impervious seal by serving as a filler for canal irregularities and minor discrepancies between the root canal wall and the core material. Several properties are required to an ideal endodontic sealer (2). Among them sealing ability, biocompatibility, and antimicrobial activity probably influence the success of the root canal treatment (1).To create and maintain a three-dimensional seal of the entire root canal system, sealers should have adhesiveness, be dimensionally stable, be insoluble to oral and tissue fluids, and have an adequate flow rate. This latter property allows the material to penetrate into irregularities, isthmi fins and ramifications, which increases the likelihood of obtaining an adequate seal of the root canal system. Moreover, sealers that possess both optimum flow ability and a...

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Section: Discussionmentioning

confidence: 99%

Antimicrobial Activity and Flow Rate of Newer and Established Root Canal Sealers

Siqueira¹,

Favieri²,

Gahyva³

et al. 2000

Journal of Endodontics

157

122

View full text Add to dashboard Cite

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“…31 In order to solve this problem, laser has been introduced recently for disinfecting root canals. [32][33][34] Lasers are of different kinds and their application may lead to different results. The results of the work by Moritz et al show that performance of diode and Nd:YAG lasers for eliminating E. faecalis in pulpectomy, was better than Er:YAG laser.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Er:YAG Laser on Entroccocus faecalis Bacterium in the Pulpectomy of Anterior Primary Teeth

et al. 2017

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Introduction: Successful root canal therapy depends on the complete elimination of microorganisms such as Entroccocus faecalis, which is impossible to achieve with the traditional methods. Lasers are recently introduced as a new method to solve the problem. The present study is planned and performed to examining the antibacterial effect of Er: YAG laser. Methods: Sixty extracted anterior primary teeth were prepared and sterilized. E. faecalis bacterium was cultured in canals. Samples were randomly divided into two groups. The first group was disinfected by NaOCl 5/25% and Er: YAG laser and the second group just by NaOCl 5/25%. Samples of canal contents were cultured and colony counts were calculated. The results were analyzed statistically by SPSS software and Mann Whitney test. Results: There was no significant difference between colony counts in both groups (P = 0.142). But the number of colonies in the first group was lower than in the second group. Conclusion: Although, Er: YAG laser cannot completely eliminate E. faecalis bacterium, its simultaneous use with NaOCl decreases E. faecalis.

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“…17,51,52 Enterococci, which are seldom found in these circumstances, have been isolated from teeth undergoing endodontic treatment and previously root treated teeth. [53][54][55][56] In a study of root filled teeth with apical periodontitis 69% of the bacterial strains recovered from the root canals were faculative anaerobes. 53,54 Enterococci were isolated in 50% of the infective cases and were the most frequently isolated.…”

Section: Endodonticsmentioning

confidence: 99%

“…[53][54][55][56] In a study of root filled teeth with apical periodontitis 69% of the bacterial strains recovered from the root canals were faculative anaerobes. 53,54 Enterococci were isolated in 50% of the infective cases and were the most frequently isolated. A later study on the susceptibility of enterococci isolated from root canals to various antibiotics found that 25 out of 29 strains were resistant to clindamycin.…”

Section: Endodonticsmentioning

confidence: 99%