Visualization of Removal of Trapped Air from the Apical Region of the Straight Root Canal Models Generating 2-phase Intermittent Counter Flow during Ultrasonically Activated Irrigation

Peeters, Harry Huiz; Iskandar, Bernard O.; Suardita, Ketut; Suharto, Djoko

doi:10.1016/j.joen.2013.10.011

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…Additionally, the results of Peeters et al [21] showed that the phenomenon of the two-phase counterflow at the interface occurred in ultrasonically activated irrigation as well. However, the solution could not be forced to the WL.…”

Section: Discussionmentioning

confidence: 97%

Visualization of removal of trapped air from the apical region in simulated root canals by laser-activated irrigation using an Er,Cr:YSGG laser

Peeters¹,

Moor

Suharto

2014

Lasers Med Sci

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The aim of this visualization study was to obtain a better understanding of the mechanism by which trapped air is removed from the apical region of simulated root canals by activation of an irrigant using an erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser during endodontic procedures. A high-speed imaging system with high temporal and spatial resolution was used to visualize laser-induced shock waves in a resin block model with a curved root canal (inner diameter at the apex 0.08 mm, taper 4 %, crown height 10 mm, overall length 40 mm) and a glass cylinder model with a straight root canal (inner diameter 1 mm, crown height 10 mm, overall length 40 mm). The study utilized MZ3 and RFT3 tips in each model, without water or air spray, and with an average power of 1 W at 35 Hz. Laser-activated irrigation overcame the airlock effect by releasing air trapped in the air column. The mechanism underlying the removal of trapped air from the apical region using an Er,Cr:YSGG laser in a dry root canal is via the disruption of the surface tension at the solution-air interface. This disruption, caused by bubble implosion (cavitation), displaces air in the form of bubbles from the apical region toward the solution, which allows the solution to travel apically.

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Section: Discussionmentioning

confidence: 97%

Visualization of removal of trapped air from the apical region in simulated root canals by laser-activated irrigation using an Er,Cr:YSGG laser

Peeters¹,

Moor

Suharto

2014

Lasers Med Sci

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“…This movement could achieve something that the passive immersion could not, which is breaking of the surface force of the PL-biofilm, being this crucial for the antiseptic penetration. This is the same theory followed in endodontics with the “hydrodynamic activation” of the antiseptic in the interior of the radicular canal by agitation (Weller et al, 1980 ; Peeters et al, 2014 ). This movement achieves to break the surface force of small root canals contributing to maximize the chemical action of the antiseptic (Peeters et al, 2014 ).…”

Section: Discussionmentioning

confidence: 69%

Ex vivo vs. in vivo antibacterial activity of two antiseptics on oral biofilm

et al. 2015

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Aim: To compare the immediate antibacterial effect of two application methods (passive immersion and active mouthwash) of two antiseptic solutions on the in situ oral biofilm.Material and Methods: A randomized observer-masked crossover study was conducted. Fifteen healthy volunteers wore a specific intraoral device for 48 h to form a biofilm in three glass disks. One of these disks was used as a baseline; another one was immersed in a solution of 0.2% Chlorhexidine (0.2% CHX), remaining the third in the device, placed in the oral cavity, during the 0.2% CHX mouthwash application. After a 2-weeks washout period, the protocol was repeated using a solution of Essential Oils (EO). Samples were analyzed for bacterial viability with the confocal laser scanning microscope after previous staining with LIVE/DEAD® BacLight™.Results: The EO showed a better antibacterial effect compared to the 0.2% CHX after the mouthwash application (% of bacterial viability = 1.16 ± 1.00% vs. 5.08 ± 5.79%, respectively), and was more effective in all layers (p < 0.05). In the immersion, both antiseptics were significantly less effective (% of bacterial viability = 26.93 ± 13.11%, EO vs. 15.17 ± 6.14%, 0.2% CHX); in the case of EO immersion, there were no significant changes in the bacterial viability of the deepest layer in comparison with the baseline.Conclusions: The method of application conditioned the antibacterial activity of the 0.2% CHX and EO solutions on the in situ oral biofilm. The in vivo active mouthwash was more effective than the ex vivo passive immersion in both antiseptic solutions. There was more penetration of the antiseptic inside the biofilm with an active mouthwash, especially with the EO. Trial registered in clinicaltrials.gov with the number NCT02267239. URL: https://clinicaltrials.gov/ct2/show/NCT02267239.

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“…Previous research found that ultrasonic irrigant activation was more successful in eliminating artificially manufactured dentine debris in simulated canal expansions with broader tapers (46) , As a result, the vibrating file of the ultrasonic devices only oscillates transversely rather than longitudinally towards the root axis. As a result, the solution's apical migration can be linked to the generation of ultrasonically produced waves at the solutionair interface, which causes trapped air in the root canal to be evacuated, allowing the solution to flow apically in the opposite direction (47) . This might explain larger amount of debris extrusion with ultrasonic activation than conventional subgroup.…”

Section: Discussionmentioning

confidence: 99%

Effect of continuous ultrasonic irrigation and diode laser activation on apical extrusion of debris: in vitro study

Elmallawany

hussin²,

Ali³

et al. 2022

Egyptian Dental Journal

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Aim:To evaluate the effect of continuous ultrasonic and diode laser root canal irrigation activation techniques on apical extrusion of debris for extracted mesial mandibular molar roots. Materials and methods:Forty extracted mandibular molars were used in this study. After teeth hemi-sectioning was done, forty mesio-buccal canals were mechanically prepared using Revo-S system files according to manufacturer instructions till size AS 35# and then, roots were randomly assigned to two equal groups according to the irrigation activation method: Group (1): conventional syringe irrigation was used after mechanical preparation. This group was subdivided into 2 subgroups: Subgroup (1A): conventional syringe irrigation with no laser and subgroup (1B): conventional syringe irrigation with diode laser. Group (2): Continuous Ultrasonic Irrigation (CUI) was used after mechanical preparation and further divided into two subgroups: Subgroup (2A): Continuous Ultrasonic Irrigation (CUI) with no laser and subgroup (2B): Continuous Ultrasonic Irrigation with diode laser. A modified version of Myers and Montgomery's experimental approach was employed to assess apically extruded debris. Debris were calculated by measuring difference of weight of Eppendorf tubes (before mechanical preparation W1 and after mechanical preparation and irrigation activation W2). All measurements were done using analytical balance.Results: In all sub groups, no significant difference was shown, but the apical debris extruded was higher in subgroup (2B) (continuous ultrasonic irrigation with diode laser) then subgroup (1B) (conventional syringe irrigation with laser) followed by subgroup (2A) (continuous ultrasonic irrigation with no laser). The least amount of apical debris was in subgroup (1A) (conventional syringe irrigation with no laser). Conclusion:Diode laser and continuous ultrasonic irrigation activation could be safely used for irrigation activation with minimal effect on apical extrusion of debris.

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Visualization of Removal of Trapped Air from the Apical Region of the Straight Root Canal Models Generating 2-phase Intermittent Counter Flow during Ultrasonically Activated Irrigation

Cited by 8 publications

References 20 publications

Visualization of removal of trapped air from the apical region in simulated root canals by laser-activated irrigation using an Er,Cr:YSGG laser

Visualization of removal of trapped air from the apical region in simulated root canals by laser-activated irrigation using an Er,Cr:YSGG laser

Ex vivo vs. in vivo antibacterial activity of two antiseptics on oral biofilm

Effect of continuous ultrasonic irrigation and diode laser activation on apical extrusion of debris: in vitro study

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