Properties of Mechanical Endodontic Instruments and the Quality of the Simulated Canal Preparation

Koprowicz, Agata; Łęski, Michał; Pawlicka, Halina

doi:10.17219/dmp/63946

Cited by 6 publications

(7 citation statements)

References 31 publications

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“…In 5 out of 10 cases, while preparing the canal with hand K-files, elbow or ledge intracanal errors were created. Results obtained by Kroczyńska [25].…”

Section: Discussionmentioning

confidence: 92%

“…In this study, the alterations of working length (WL), however not statistically significant, were observed. In the published research, the loss of WL was observed [3,7,8,18,[23][24][25]. Some of these results has been reported as not statistically significant [3,5,10,24], in the contrary to others.…”

Section: Discussionmentioning

confidence: 99%

“…Wilkoński et al observed bigger change in WL in WaveOne (0.47 mm) and smaller in Mtwo (0.04 mm) [17]. Koprowicz et al obtained lower WL loss in ProTaper Next than in WaveOne [25]. Radwański et al obtained lower loss of WL while using with WaveOne Gold than in ProTaper Next.…”

Section: Discussionmentioning

confidence: 99%

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Magnetic Resonance Imaging for Assessment of Endodontic Instruments’ Precision during “L-Shaped” Model Root Canals Preparation

et al. 2021

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The purpose of the mechanical root canal preparation is to clean it and give it the right shape. The preparation should be carried out in a way that maintains the original curvature and initial orientation of the apical end. Insufficient root canal preparation may prevent effective chemical decontamination and obturation to the full working length. The study aims to evaluate the shaping ability and effectiveness of the NiTi rotary and reciprocating endodontic instruments, compared to standard hand files using magnetic resonance imaging based on spin echo. Material and methods: A comparative study of severely curved root canals’ shaping abilities using three NiTi systems and K-type hand files was performed, with 40 training “endo-blocks” presenting with “L-shaped” canal. The root canal topography and geometry “before” and “after” mechanical preparation obtained by the magnetic resonance imaging based on the spin echo was used. The main measurement was made using the RARE sequence, with slice thickness reduced to 100 micrometers. In order to improve the signal-to-noise ratio, NA = 25 was used. To minimize the measurement time, the field of view was limited to a cuboid 17 × 16 × 3 mm, with a resolution of 33 × 31 × 100 micrometers. Each 3D image consisted of 512 × 512 × 30 voxels. The imaging plane has been selected in such a way as to fully illustrate the course of curvature of the model root canal. For TR = 5 s and effective TE = 36 ms, TA was 1.5 h. Measurements were performed twice, before and after the preparation of endo-blocs with a selected type of endodontic tools. Results: The use of rotary NiTi instruments caused a substantial alteration in the curvature topography and angle of the canals and change in the curvature length. The substantial discrepancy was observed during the preparation of simulated root canals with the reciprocating instruments and the use of WaveOne files led to the largest volume variation. No dependence between the amount of material removed and the measured intracanal side was observed when NiTi instruments were used. Preparation with hand K-type files revealed a relationship between the measuring side and the amount of material removed, with the lower values obtained for the canals’ internal curvatures. Conclusions: All the studied endodontic instruments allow a safe preparation of curved root canals in simulating in vivo conditions. The abbreviation of original root canals topography does not seem to be significantly altered following mechanical preparation of simulated, severely curved root canals. The spin echo-based magnetic resonance imaging technique can be utilized for visualization of the internal topography of the root’s canals in vitro before and after their mechanical preparation in in vitro conditions. In the future, magnetic resonance microscopy may become a diagnostic tool supporting the work of a clinician.

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“…In 5 out of 10 cases, while preparing the canal with hand K-files, elbow or ledge intracanal errors were created. Results obtained by Kroczyńska [25].…”

Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

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Magnetic Resonance Imaging for Assessment of Endodontic Instruments’ Precision during “L-Shaped” Model Root Canals Preparation

et al. 2021

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“…(1,3) This suggests that previous endodontic treatment could not e ciently control these microorganisms. Mechanical instrumentation using larger size rotary instruments may help to remove bacteria and fungi in the root canals, but it cannot completely eradicate microbes in complex root canal structures and excessive instrumentation weakens root dentin (22)(23)(24)(25). Thus, effective antimicrobial intracanal medication can overcome the limitations of instrumentation to reduce microorganisms in complex anatomy of the root canals.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Chitosan Paste as Intracanal Medication Against Enterococcus Faecalis and Candida Albicans Biofilm Compared with Calcium Hydroxide in an In Vitro Root Canal Infection Model

Thienngern

Panichuttra

Ratisoontorn

et al. 2022

Preprint

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Background Enterococcus faecalis and Candida albicans are frequently found in persistent endodontic infection and are resistant to calcium hydroxide (Ca(OH)2), a commonly used intracanal medication. Thus, an effective and safe antimicrobial medication against such refractory infection is necessary in endodontic retreatment, so we aimed to test the efficacy of chitosan paste against these microorganisms compared with Ca(OH)2 in root canals of extracted human teeth. Methods Thirty-six sterilized human root samples prepared from extracted premolars and upper maxillary incisors were infected with E. faecalis for 14 days, while 32 were infected with C. albicans for 48 hours, for mature biofilm formation. The samples were assigned to 6 groups of intracanal medications: no medication (negative control), 20% Polyethylene glycol (PEG), 20% Propylene glycol (PG), Chitosan+PEG, Chitosan+PG, and Ca(OH)2. After 7 days, intracanal surface dentin was harvested using Protaper next, resuspended, serially diluted and spread on Brain-Heart-Infusion agar (for E. faecalis) and Yeast Extract-Peptone-Dextrose agar (for C. albicans) for colony count. Antimicrobial efficacy was determined as percentage of remaining colony forming unit (CFUs) relative to negative control and analyzed using One-way ANOVA and post-hoc Games-Howell test. The significance level was set at 0.05. Results For E. faecalis, chitosan+PEG and chitosan+PG medication significantly reduced viable bacteria compared with negative control, PEG and PG ( P = 0.001, 0.003, 0.024, respectively for chitosan+PEG; P = 0.002, 0.003, 0.014, respectively for chitosan+PG ). Chitosan+PG also had significantly higher antibacterial activity than Ca(OH)2 (P =0.039). For C.albicans, chitosan+PEG and chitosan+PG, but not Ca(OH)2, showed a significantly lower level of remaining CFUs compared with negative control (P = 0.013 and 0.005, respectively). Conclusion Chitosan paste showed good efficacy as intracanal medication in reducing viable E. faecalis and C. albicans biofilm during 7 days in root canals. In particular, Chitosan+PG was significantly more effective against E. faecalis than Ca(OH)2. Therefore, it could be developed as an effective alternative medication in endodontic retreatment.

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“…Root canal shaping, which is done with a variety of endodontic files, is crucial for a successful root canal therapy [47,48,49] mechanical properties of endodontic device can be assessed using nanoscience, Jamleh and his colleagues [50] as an example A nano-indentation method was used to test the impact of periodic wear on nickel-titanium alloys. In endodontics, a piece of equipment known as (NiTi) is employed.…”

Section: Modification In Surface Quality Of Endodontic Instrumentsmentioning

confidence: 99%

Application of Nanoparticles in Endodontics

Bute

Ikhar

Bhonde

et al. 2021

JPRI

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Nanoscience is a planned blend of nanotechnologies/nanoparticles used in healthcare to discover novel treatment strategies for human infections. N anotechnology is used in many aspects of our daily lives, including medical science. Nanostructures are employed in dental advances, diagnosis and treatment [2]. When compared to traditional materials, Nanoparticles was shown to have significantly superior adhesive plus surface properties. Nanotechnology’s practical implementation in endodontics has allows for new study in this domain.

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Properties of Mechanical Endodontic Instruments and the Quality of the Simulated Canal Preparation

Cited by 6 publications

References 31 publications

Magnetic Resonance Imaging for Assessment of Endodontic Instruments’ Precision during “L-Shaped” Model Root Canals Preparation

Magnetic Resonance Imaging for Assessment of Endodontic Instruments’ Precision during “L-Shaped” Model Root Canals Preparation

Efficacy of Chitosan Paste as Intracanal Medication Against Enterococcus Faecalis and Candida Albicans Biofilm Compared with Calcium Hydroxide in an In Vitro Root Canal Infection Model

Application of Nanoparticles in Endodontics

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