scholarly journals Sealer penetration and marginal permeability after apicoectomy varying retrocavity preparation and retrofilling material

2006 ◽  
Vol 17 (4) ◽  
pp. 323-327 ◽  
Author(s):  
Renata Winik ◽  
Ângela Toshie Araki ◽  
José Augusto Alves Negrão ◽  
Marina Stella Bello-Silva ◽  
José Luiz Lage-Marques
Keyword(s):  
Rhodamine B ◽  
Root Canal ◽  
Sem Analysis ◽  
Canal System ◽  
Dentinal Tubules ◽  
Lower Permeability ◽  
Periapical Healing ◽  
Root Canal System ◽  
Rhodamine B Dye ◽  
Negative Controls

Apicoectomy failure is generally related to inappropriate marginal sealing of the retrocavity, which allows percolation of microorganisms and their products from root canal system to periapex. This study evaluated tubular penetration of canal sealers and marginal permeability after retrocavity irradiation with Er;Cr:YSGG laser and retrofilling with MTA or cyanoacrylate. Twenty-two single-rooted teeth were decoronated and endodontically treated, their apical 3 mm were resected and the root ends were retroprepared with a low-speed bur. Twenty roots were randomly assigned to 4 groups (n=5): GI and GII - retrofilling with MTA and cyanoacrylate, respectively; GIII and GIV - retrocavity irradiation with Er;Cr:YSGG laser (2.78 µm, 4 W, 20 Hz, 70.8 J/cm²) and retrofilling with MTA and cyanoacrylate, respectively. The remaining 2 roots served as positive and negative controls. The analysis of rhodamine B dye infiltration (p=0.05) demonstrated that laser irradiation and MTA retrofilling presented significantly higher permeability rates (p<0.05). Retrofilling with cyanoacrylate showed significantly lower permeability, either when laser was used or not on retrocavity. SEM analysis depicted more cyanoacrylate penetration through dentinal tubules when compared to MTA, suggesting a more efficient marginal sealing. Based on these results, it may be concluded that cyanoacrylate provided a less permeable retrofilling regardless of the retropreparation method, suggesting a more favorable condition to the establishment of the periapical healing.

scholarly journals Debunking the Concept of Dentinal Tubule Penetration of Endodontic Sealers: Sealer Staining with Rhodamine B Fluorescent Dye Is an Inadequate Method

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3211
Author(s):  
David Donnermeyer ◽  
Sina Schmidt ◽  
Arno Rohrbach ◽  
Johannes Berlandi ◽  
Sebastian Bürklein ◽  
...  
Keyword(s):  
Penetration Depth ◽  
Rhodamine B ◽  
Root Canal ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Dentinal Tubule ◽  
Dentinal Tubules ◽  
Ah Plus ◽  
Root Dentin ◽  
Rhodamine B Dye

The aim of this study was to investigate the suitability of rhodamine B dye staining of an epoxy resin sealer (AH Plus) and calcium-silicate-based sealers (Total Fill BC Sealer, BioRoot RCS) to represent the penetration depth of the sealers into dentinal tubules after root canal obturation. In a three-step process, (1) leaching of rhodamine B from sealers into a buffer solution, (2) passive penetration of leached rhodamine B into dentinal tubules, and (3) conformity of rhodamine B penetration assessed by confocal laser scanning microscopy (CLSM), and sealer penetration assessed by scanning electron microscopy (SEM), in root-canal-filled teeth, were evaluated. Rhodamine B dye massively leached out of Total Fill BC Sealer and BioRoot RCS into the phosphate-buffered saline (PBS). A pinkish coloration of AH Plus was found after contact with PBS. Leached rhodamine B dye passively penetrated dentinal tubules from all three sealers when placed on root dentin. No correlation was observed between sealer penetration in SEM and rhodamine B penetration in CLSM. Staining of sealers using rhodamine B is an inadequate method with which to evaluate sealer penetration depth into dentinal tubules, as it overestimates the penetration of sealers into root dentin tubules.

scholarly journals Histological Evaluation of Multisonic Technology for Debridement of Vital and Necrotic Pulp Tissues from Human Molar Teeth. An Observational Study

2021 ◽  
Vol 11 (22) ◽  
pp. 11002
Author(s):  
David E. Jaramillo ◽  
Alberto R. Arriola
Keyword(s):  
Observational Study ◽  
Root Canal ◽  
Histological Evaluation ◽  
Canal System ◽  
Pulp Tissue ◽  
Dentinal Tubules ◽  
Mandibular Molar ◽  
Molar Teeth ◽  
Root Canal System ◽  
Irreversible Pulpitis

Background: This study evaluated the efficacy of a multisonic technology for the debridement of vital and necrotic pulp tissues in freshly extracted human mandibular molar teeth. Methods: Twelve teeth with a diagnosis of symptomatic irreversible pulpitis (SIP) and twelve teeth with a diagnosis of pulp necrosis with symptomatic apical periodontitis (SAP) were extracted. The GentleWave® procedure was performed on 10 teeth from each group. Four non-treated teeth served as histologic controls. Histological consecutive 5 µm sections were obtained from the apical, middle, and coronal portion of the canals. The canals were evaluated for the presence of pulpal debris and bacteria. Results: In nine out of the ten specimens with SIP, no pulpal debris was detected in any portion of the canals. In the necrotic pulp group, eight out of the ten specimens had no detectable pulpal debris in any portion of the canal spaces. No bacteria were detected in the main canals, isthmuses, or lateral canals, but were detected deep within the dentinal tubules in 10 specimens. Conclusions: This study demonstrated that the multisonic technology was effective at removing vital and necrotic pulp tissue as well as bacteria from the root canal system, including inaccessible areas.

scholarly journals Physiotherapeutic methods of processing root channels with application of light exposure in dentistry

2020 ◽  
Vol 18 (3) ◽  
pp. 10-14
Author(s):  
A. V. Larinskaya ◽  
A. V. Yurkevich ◽  
I. D. Ushnitsky ◽  
V. F. Mikhalchenko ◽  
A. V. Mikhalchenko ◽  
...  
Keyword(s):  
Root Canal ◽  
Beam Energy ◽  
Laser Light ◽  
Light Exposure ◽  
Canal System ◽  
Human Teeth ◽  
Dentinal Tubules ◽  
Main Research ◽  
Root Canal System ◽  
And Diffusion

Aim. Substantiate the use of light exposure as physiotherapeutic methods of root canal treatment.Materials and methods. For the study, 93 human teeth were taken, all teeth were divided into 3 groups of 31 samples. Optical microscopy was used as the main research method.Results. The effect of laser radiation on biological structures depends on the wavelength of the energy emitted by the laser, the energy density of the beam, and the temporal characteristics of the beam energy. The processes that can occur in this case are reflection, absorption, scattering and transmission. The interaction of laser light and tissues occurs with optical proximity between them. This interaction is specific and selective, based on absorption and diffusion. The smaller the approach, the more light will be reflected or transmitted.Conclusions. Currently, in endodontics, diode lasers are the best systems for disinfecting the root canal system due to their ability to penetrate the dentinal tubules. The optical proximity of their wavelengths to bacteria leads to the destruction of the latter due to the photo-thermal effect.

scholarly journals The efficiency of canal cleaning with reciprocating movements instruments - SEM study

2020 ◽  
Vol 148 (3-4) ◽  
pp. 148-152
Author(s):  
Slavoljub Zivkovic ◽  
Jelena Neskovic ◽  
Marijana Popovic-Bajic ◽  
Milica Medojevic-Jovanovic
Keyword(s):  
Root Canal ◽  
Sem Analysis ◽  
Smear Layer ◽  
Apical Region ◽  
Canal System ◽  
Single File ◽  
Sem Study ◽  
Root Canal System ◽  
Group 2 ◽  
Niti Instruments

Introduction/Objective. The application of nickel?titanium (NiTi) instruments in cleaning and shaping of the root canal system is a standard and a precondition for the success of endodontic treatment. The objective of this study was to use scanning electron microscopy (SEM) analysis in order to examine the efficiency of cleaning the apical third of the root canal system using two different NiTi systems with reciprocating movements. Methods. The study included 20 single-rooted teeth (premolars) divided into two groups. In group 1, the canal preparation was realized with a single file UNICONE with reciprocating movements (MEDIN, Inc., Nove M?sto na Morav?, Czech Republic), and in group 2, with ? RECIPROC BLUE instrument with reciprocating movements (VDW GmbH, Munich, Germany). The same quantities of 2% NaOCl solution and 17% EDTA solution were used as irrigation solutions. The samples prepared for SEM analysis of the smear layer in the apical third were evaluated on a scale of 1?5 and at a magnification of 1,000?. Results. SEM analysis pointed to mostly clean canal walls in the apical segment in both tested groups. Slightly cleaner walls were observed after the application of the UNICONE file (78%) compared to the samples of the second group, where the instrumentation was realized by the RECIPROC BLUE file (76%), but without statistically significant differences. Conclusion. Single-file reciprocating systems do not remove the smear layer completely, but provide efficient cleaning of the apical region of the canal.

Root CanalIrrigants in Pediatric Dentistry:A Literature Review & Update

2019 ◽  
Vol 14 (02) ◽  
pp. 144-168
Author(s):  
Vaibhav Kotecha
Keyword(s):  
Root Canal ◽  
Primary Teeth ◽  
Canal System ◽  
Specific Sequence ◽  
Dentinal Tubules ◽  
Root Canal Irrigants ◽  
Bacterial Contaminants ◽  
Root Canal System ◽  
Necrotic Debris ◽  
The Ideal

Successful root canal treatment is dependent on the removal of microorganisms from he pulp and other anatomical irregularities of the root canal system. However, complete elimination of bacterial contaminants as well as necrotic debris require adjunctive use of root canal irrigants along with mechanical instrumentation. Irrigants can augment mechanical debridement by flushing out debris, dissolving tissue, and disinfecting the root canal system.Chemical debridement is especially needed for primary teeth with complex internal anatomy and zones inaccessible to debridements, such as accessorycanals, ramifications, and dentinal tubules that might be missed by instrumentation.None of the available irrigating solutions alone provides all the ideal requirements. Studies have shown that a combination of two or more irrigating solutions in a specific sequence will help to achieve optimal irrigation

scholarly journals Penatalaksanaan Gigi 36 dengan Diagnosis Nekrosis Pulpa disertai Abses Periapikal Kronis

2020 ◽  
Vol 8 (2) ◽  
pp. 90-100
Author(s):  
Ratu Amelia ◽  
Deli M
Keyword(s):  
Case Report ◽  
Root System ◽  
Calcium Hydroxide ◽  
Root Canal ◽  
Endodontic Treatment ◽  
Canal System ◽  
Periapical Lesions ◽  
Periapical Abscess ◽  
Periapical Healing ◽  
Root Canal System

The main goal of endodontic treatment is to remove the entire microbial flora from the root canal system and promote periapical healing. Microorganisms that settle in the root system play an important role in the development and persistence of periapical lesions. Necrotic canals provide a very favorable environment for the growth of microorganisms in the root canal system. Thus, elimination of these bacteria is essential for apical and periapical healing after endodontic treatment. This case report discusses the endodontic treatment using calcium hydroxide in a necrotic pulp with chronic periapical abscess.

scholarly journals Micro-tomographic characterization of the root and canal system morphology of mandibular first premolars in a Chilean population

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Alfredo Sierra-Cristancho ◽  
Luis González-Osuna ◽  
Daniela Poblete ◽  
Emilio A. Cafferata ◽  
Paola Carvajal ◽  
...  
Keyword(s):  
Root Canal ◽  
Multiple Root ◽  
Root Anatomy ◽  
Type I ◽  
Micro Computed Tomography ◽  
Canal System ◽  
Root Canals ◽  
Wide Range ◽  
Root Canal System ◽  
Chilean Population

AbstractThis study aimed to analyze the root anatomy and root canal system morphology of mandibular first premolars in a Chilean population. 186 teeth were scanned using micro-computed tomography and reconstructed three-dimensionally. The root canal system morphology was classified using both Vertucci’s and Ahmed’s criteria. The radicular grooves were categorized using the ASUDAS system, and the presence of Tomes’ anomalous root was associated with Ahmed’s score. A single root canal was identified in 65.05% of teeth, being configuration type I according to Vertucci’s criteria and code 1MP1 according to Ahmed’s criteria. Radicular grooves were observed in 39.25% of teeth. The ASUDAS scores for radicular grooves were 60.75%, 13.98%, 12.36%, 10.22%, 2.15%, and 0.54%, from grade 0 to grade 5, respectively. The presence of Tomes’ anomalous root was identified only in teeth with multiple root canals, and it was more frequently associated with code 1MP1–2 of Ahmed’s criteria. The root canal system morphology of mandibular first premolars showed a wide range of anatomical variations in the Chilean population. Teeth with multiple root canals had a higher incidence of radicular grooves, which were closely related to more complex internal anatomy. Only teeth with multiple root canals presented Tomes’ anomalous root.

scholarly journals Analysis of the Morpho-Geometrical Changes of the Root Canal System Produced by TF Adaptive vs. BioRace: A Micro-Computed Tomography Study

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 531
Author(s):  
Loai Alsofi ◽  
Muhannad Al Harbi ◽  
Martin Stauber ◽  
Khaled Balto
Keyword(s):  
Surface Area ◽  
Root Canal ◽  
Type I ◽  
Structure Model ◽  
Canal Surface ◽  
Canal System ◽  
Structure Model Index ◽  
Continuous Rotation ◽  
Before And After ◽  
Root Canal System

We aimed to analyze the morpho-geometric changes of the root canal system created by two rotary systems (TF Adaptive and BioRace) using micro-CT technology. Two concepts of rotary file system kinematics, continuous rotation and adaptive kinematics, were used in root canal preparation. Twenty mandibular molars (n = 20) were selected with the following criteria: the teeth have mesial roots with a single and continuous isthmus connecting the mesiobuccal and mesiolingual canals (Vertucci’s Type I configuration) and distal roots with independent canals. Teeth were scanned at a resolution of 14 μm. Canals were divided equally into two groups and then enlarged sequentially using the BioRace system and TF Adaptive system according to manufacturer protocol. Co-registered images, before and after preparation, were evaluated for morphometric measurements of canal surface area, volume, structure model index, thickness, straightening, and un-instrumented surface area. Before and after preparation, data were statistically analyzed using a paired sample t-test. After preparation, data were analyzed using an unpaired sample test. The preparation by both systems significantly changed canal surface area, volume, structure model index, and thickness in both systems. There were no significant differences between instrument types with respect to these parameters (p > 0.05). TF Adaptive was associated with less straightening (8% compared with 17% for BioRace in the mesial canal, p > 0.05). Both instrumentation systems produced canal preparations with adequate geometrical changes. BioRace straightened the mesial canals more than TF Adaptive.

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