Dentine tubule infection and endodontic therapy implications

Oguntebi, Bamiduro R.

doi:10.1111/j.1365-2591.1994.tb00257.x

Cited by 99 publications

(68 citation statements)

References 42 publications

(8 reference statements)

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“…Studies with bovine teeth have been questioned because their tubules have wider diameters than human tubules (85). Studies that involve grinding may destroy certain species of bacteria (97). Others, using stains, do not identify gram negative bacteria (98).…”

Section: In Vivo Studiesmentioning

confidence: 99%

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The Role of Apical Instrumentation in Root Canal Treatment: A Review of the Literature

Baugh

Wallace

2005

Journal of Endodontics

142

113

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The issue of final apical preparation size remains controversial despite considerable clinical and in vitro research. The astute clinician must be aware of this research before choosing any instrumentation system because the informed clinician's decision must be guided by the best available evidenced-based information. This review article generated a Medline-based search strategy to disclose these studies and provides a critique and summary of the results.From the University of Pittsburgh School of Dental Medicine, Pittsburgh, Pennsylvania.Address request for reprints to Dean Baugh, DDS. E-mail address: baughdf@yahoo.com.Copyright © 2005 by the American Association of Endodontists T he most important objective of root canal therapy is to minimize the number of microorganisms and pathologic debris in root canal systems to prevent or treat apical periodontitis. This process of chemomechanical debridement, or cleaning of the root canal systems, has been described as the removal of all of the contents of the root canal systems before and during shaping. Grossman (1) described mechanical cleaning as the most important part of root canal therapy. Schilder (2) also considered cleaning and shaping as the foundation for successful endodontic therapy.Thorough instrumentation of the apical region has long been considered to be an essential component in the cleaning and shaping process. It was discussed as a critical step as early as 1931 by Groove (3). Simon (4) later recognized the apical area as the critical zone for instrumentation. Other authors (5, 6) concluded that the last few millimeters that approach the apical foramen are critical in the instrumentation process. Mechanical instrumentation and irrigation are sound endodontic principles and essential components of successful endodontics (7,8). Research has shown that mechanical instrumentation greatly reduces the number of microorganisms remaining in the root canal system. Mechanical instrumentation (9) has been shown to reduce bacterial count even without irrigants or dressings. A combination of mechanical instrumentation and irrigation (9, 10) further reduced the number of microorganisms by 100 to 1000 times. However, mechanical instrumentation with irrigation does not reliably disinfect an infected root canal system (11-14).Manufacturers developed nickel-titanium rotary instrumentation systems to facilitate the cleaning and shaping process. They are popular because of their apparent ease of use and reduced number of instruments. However, Spangberg (6) noted that the strong emphasis on reducing the number of instruments and limiting apical preparations to small sizes does not produce clean apical preparations in diseased teeth. Given this controversial and important topic, we conducted a broad-based Medline search of the literature to characterize the major factors involved in apical canal instrumentation. Table 1 provides the Medline search strategy used to identify relevant articles for this review. A secondary search was then conducted using the refere...

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Section: In Vivo Studiesmentioning

confidence: 99%

“…New molecular techniques are being developed to better identify and quantify bacteria (94,95,97) in human dental tubules. The primary advantage of these molecular techniques is greater sensitivity and specificity.…”

Section: In Vivo Studiesmentioning

confidence: 99%

The Role of Apical Instrumentation in Root Canal Treatment: A Review of the Literature

Baugh

Wallace

2005

Journal of Endodontics

142

113

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“…A direct contact between chemical agents and microorganisms is required in order to execute its bactericidal action. However, the penetration depth of chemical agent is about one order lower than the penetration ability of microorganisms that limit their bactericidal action [2]. On the other hand, studies revealed incomplete removal of the smear layer from the root canal walls, particularly in the apical third, when chemo-mechanical preparation was used [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Investigations of radicular dentin permeability and ultrastructural changes after irradiation with Er,Cr:YSGG laser and dual wavelength (2780 and 940 nm) laser

et al. 2015

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The aim of this study was to assess the effectiveness of dual wavelength (2780 nm Er,Cr:YSGG, 940 nm diode) laser in elimination of smear layer comparing it with Er,Cr:YSGG laser in terms of radicular dentin permeability and ultrastructural changes of root canal walls. Fifty-one sound single-rooted extracted teeth were instrumented up to size F4 and divided into three groups: group Co, non-irradiated samples; group A, irradiated with Er,Cr:YSGG laser; group B, irradiated with the dual wavelength laser. Afterward, the roots were made externally impermeable, filled with 2% methylene blue dye, divided horizontally into three segments reflecting the cervical, middle, and apical thirds then examined under microscope. Using analytical software, the root section area and dye penetration area were measured, and then, the percentage of net dye penetration area was calculated. Additionally, scanning electron microscope investigations were accomplished. Analysis of variance (ANOVA) showed significant differences between all groups over the three root thirds. Dye permeation in dual wavelength laser group was significantly higher over the whole root length: cervical, middle, and apical compared to Er,Cr:YSGG laser group and non-irradiated samples (p < 0.001). Scanning electron micrographs of dual wavelength irradiated samples showed a distinctive removal of smear layer with preservation of the annular structure of dentinal tubules. Er,Cr:YSGG laser root canal irradiation produced uneven removal of smear layer, in efficient cleanliness especially in the apical third. There was no sign of melting and carbonization. Within the studied parameters, root canal irradiation with dual wavelength laser increased dentin permeability.

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“…Oggi si ritiene che l'infezione endodontica sia polimicrobica: ciò comporta un maggior rischio di riassorbimento osseo periapicale e di esacerbazione della sintomatologia dolorosa (24). I batteri possono trovarsi non solo a livello del lume canalare, ma possono invadere anche i tubuli dentinali, i quali, con la loro struttura a nido d'ape, possono fungere da reservoir per future infezioni dentali e sistemiche, in quanto sfuggono ai normali trattamenti (12,13,15). Questi microrganismi giocano un ruolo importante nello sviluppo della sintomatologia dolorosa (10) ma anche del riassorbimento osseo periapicale (24).…”

Section: Introduzioneunclassified

Isolation of microrganisms involved in endodontic infection

Gatti¹,

Rini²,

Schiavone³

et al. 2010

Microbiol Med

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Isolamento di microrganismi nelle infezioni endodontiche SUMMARYIn endodontic infections a lot of different microrganisms can be time inside dentinal tubules to support such infections. Most of these are Gram negative anaerobes bacteria able to induce an immune response that is the apparent cause of periapical lesion, but also Gram positive facultative aerobic species and fungi of the genus Candida.They play an important role in pain but also in bone periapical resorption. Therefore, the exact knowledge and the subsequent elimination of the microrganisms involved by the system of root canals, although difficult to achieve completely, is essential for the resolution of apical periodontitis. Aims The purpose of this study was to identify the presence of pathogenic microrganisms in patients with endodontic disease using two techniques: direct hybridization of rRNA of commerce and traditional culture.The results were compared.

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Dentine tubule infection and endodontic therapy implications

Cited by 99 publications

References 42 publications

The Role of Apical Instrumentation in Root Canal Treatment: A Review of the Literature

The Role of Apical Instrumentation in Root Canal Treatment: A Review of the Literature

Investigations of radicular dentin permeability and ultrastructural changes after irradiation with Er,Cr:YSGG laser and dual wavelength (2780 and 940 nm) laser

Isolation of microrganisms involved in endodontic infection

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