Calcium hydroxide removal in curved root canals with apical transportation In Vitro

AIM: The aim of the present study was to compare the canal transportation and centering ability of three rotary nickel-titanium file systems, HyFlex controlled memory, Revo-S, and Mtwo in moderately curved root canals using computed tomography (CT). MATERIALS AND METHODS: Thirty freshly extracted single-rooted teeth having curved root canals with at least 10°–20° of curvature were selected. The teeth were divided into three experimental groups of ten each. After preparation with HyFlex CM (Coltene-Whaledent, Allstetten, Switzerland), Revo-S (Micro-Mega, Besançon, France), and Mtwo (VDW, Munich, Germany) all teeth were scanned using CT to determine the root canal shape. Pre- and post-instrumentation images were obtained at three levels, 3 mm apical, 9 mm middle, and 15 mm coronal above the apical foramen were compared using CT software. Amount of transportation and centering ability were assessed. The three groups were statistically compared with analysis of variance and post-hoc Tukey’s honestly significant difference test. RESULTS: Least apical transportation and higher centering ability were seen in HyFlex CM file system in all the three sections followed by Revo-S, Mtwo file system showed maximum transportation. CONCLUSIONS: According to the present in-vitro study, we can conclude that HyFlex CM rotary file systems showed least canal transportation and highest centering ability as compared to Revo-S and Mtwo file system but there was no statistically significant difference among these file systems (p > 0.05) at coronal, middle, and apical level of root canal.

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In vitro Assessment of Calcium Hydroxide Removal from Endo Blocks by Simple Irrigation with NaOCl and the Passive Ultrasonic Irrigation Technique

Materiale Plastice ◽

10.37358/mp.17.1.4799 ◽

2017 ◽

Vol 54 (1) ◽

pp. 122-124

Author(s):

Alexandru Vlasa ◽

Carmen Biris ◽

Luminita Lazar ◽

Anamaria Bud ◽

Eugen Bud ◽

...

Keyword(s):

Calcium Hydroxide ◽

Canal System ◽

Passive Ultrasonic Irrigation ◽

Root Canals ◽

Incomplete Removal ◽

Ultrasonic Irrigation ◽

Root Canal System ◽

In Vitro Assessment ◽

Calcium Hydroxide Removal

Because endodontic pathology is caused due to bacterial contamination of the root canal system, endodontic treatment should focus on eliminating microorganisms in root canals. For more than 70 years Calcium Hydroxide has an important role in antimicrobial endodontic therapy. The use of calcium hydroxide is limited by the incomplete removal thereof, a residue covering 20% to 45% of the ductal wall, even after irrigation with NaOCl or EDTA. This study aims to evaluate the removal of calcium hydroxide in root canals using two different techniques.

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In vitro evaluation of the effectiveness of the chemomechanical preparation against Enterococcus faecalis after single- or multiple-visit root canal treatment

Brazilian Oral Research ◽

10.1590/s1806-83242007000400005 ◽

2007 ◽

Vol 21 (4) ◽

pp. 308-313 ◽

Cited By ~ 8

Author(s):

Eduardo Diogo Gurgel-Filho ◽

Nilton Vivacqua-Gomes ◽

Brenda Paula Figueiredo de Almeida Gomes ◽

Caio Cezar Randi Ferraz ◽

Alexandre Augusto Zaia ◽

...

Keyword(s):

Calcium Hydroxide ◽

Enterococcus Faecalis ◽

Root Canal ◽

Control Groups ◽

Single Visit ◽

Root Canals ◽

Multiple Visit ◽

Microbial Samples ◽

Chlorhexidine Gel

The purpose was to assess the elimination of Enterococcus faecalis in vitro in human mandibular premolars after chemomechanical preparation with or without the use of a calcium hydroxide dressing. After 60 days of contamination with E. faecalis, the root canals were prepared using the Crown-Down technique combined with 2% chlorhexidine gel irrigation. Then, the specimens were divided into two experimental groups, treated in a single visit or in multiple visits, and two control groups. The multiple-visit group received a dressing with calcium hydroxide for 14 days (CalenTM) and the single-visit group did not receive any medication. In the two control groups, the canals were filled with BHI after chemomechanical preparation with 2% chlorhexidine gel or distilled water. Microbial samples were taken from the root canals for colony forming unit count for each phase of the treatment using sterile paper points inside the root canal lumen. Data were ranked and analyzed by the Kruskal-Wallis statistical test. The residual microbial colonies were then assessed. The results showed that chemomechanical preparation using 2% chlorhexidine gel with no intra-canal dressing reduced by 100% the E. faecalis contamination of the root canal lumen. The calcium-hydroxide group that received the 14-day intra-canal dressing allowed a small number of bacteria to grow between visits, but without statistical differences between groups.

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Passive ultrasonic irrigation in calcium hydroxide removal from root canals: a sem/eds analysis

Journal of Research in Dentistry ◽

10.19177/jrd.v3e32015668-677 ◽

2015 ◽

Vol 3 (3) ◽

pp. 668

Author(s):

Fernanda Hoffmann Busanello ◽

Angela Longo Do Nascimento ◽

Lilian Tietz ◽

Mirela Sangoi Barreto ◽

Ricardo Abreu Da Rosa ◽

...

Keyword(s):

Calcium Hydroxide ◽

Root Canal ◽

Control Group ◽

Passive Ultrasonic Irrigation ◽

Root Canals ◽

Eds Analysis ◽

Ultrasonic Irrigation ◽

Calcium Hydroxide Removal ◽

And Control ◽

Elementary Chemical

AIM: The aim of this study was to evaluate the efficacy of different lengths of time of passive ultrasonic irrigation (PUI) in removing calcium hydroxide (CH) paste from root canal, using scanning electron microscopy and energy dispersive spectrometry (SEM/EDS). MATERIAL AND METHODS: Fifty-four human premolars were used. After coronal access, a size #15 K-file was used to obtain apical patency. Root canal preparation was performed using WaveOne 40.08 instruments. CH paste was placed into the root canal. Specimens were stored in a humid environment, and after seven days, they were divided into five groups (n=12) according to the irrigation protocols: Manual– a size #40 K-file; PUI/1– 1 min; PUI/2– 2 min; PUI/3– 3 min; and Control– without CH paste. An elementary chemical microanalysis (SEM/EDS) was performed to quantify the presence of calcium on the dentinal walls. RESULTS: The percentage of calcium was higher in all experimental groups when compared to the control group (P < 0.05); but no differences among them were found (P > 0.05). CONCLUSION: The amount of calcium hydroxide paste on the dentinal walls was not dependent on length of time of ultrasonic activation. SEM/EDS analysis seems to be a reliable method to assess CH paste removal from the root canals.

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Cone-beam computed tomography analysis of centering ability and transportation of curved root canals prepared with three rotary nickel-titanium systems (In Vitro-Study)

IJS Short Reports ◽

10.4103/ijssr.ijssr_21_17 ◽

2018 ◽

Vol 3 (1) ◽

pp. 58

Author(s):

HananYahya Fallatah ◽

SamiaMohamed El Sherief

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

In Vitro Study ◽

Nickel Titanium ◽

Vitro Study ◽

Cone Beam ◽

Root Canals ◽

Tomography Analysis ◽

Curved Root Canals

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Influence of cervical preflaring on apical transportation in curved root canals instrumented by reciprocating file systems

BMC Oral Health ◽

10.1186/s12903-015-0137-0 ◽

2015 ◽

Vol 15 (1) ◽

Cited By ~ 3

Author(s):

Neisiana Barbieri ◽

Denise Piotto Leonardi ◽

Marina Samara Baechtold ◽

Gisele Maria Correr ◽

Marilisa Carneiro Leão Gabardo ◽

...

Keyword(s):

File Systems ◽

Root Canals ◽

Apical Transportation ◽

Curved Root Canals

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In vitro comparison of passive and continuous ultrasonic irrigation in curved root canals

Journal of Clinical and Experimental Dentistry ◽

10.4317/jced.53023 ◽

2016 ◽

pp. 0-0 ◽

Cited By ~ 3

Author(s):

P Castelo-Baz ◽

P Varela-Patino ◽

G Cantatore ◽

A Dominguez-Perez ◽

M Ruiz-Pinon ◽

...

Keyword(s):

Root Canals ◽

Ultrasonic Irrigation ◽

Curved Root Canals ◽

In Vitro Comparison

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Influence of calcium hydroxide points on the quality of intracanal dressing filling

Journal of Applied Oral Science ◽

10.1590/s1678-77572006000300014 ◽

2006 ◽

Vol 14 (3) ◽

pp. 219-223 ◽

Cited By ~ 2

Author(s):

Nicole de Mello Rahde ◽

José Antonio Poli Figueiredo ◽

Elias Pandonor Motcy Oliveira

Keyword(s):

Calcium Hydroxide ◽

Root Canal Filling ◽

Human Teeth ◽

Significance Level ◽

Root Canals ◽

Gutta Percha ◽

Group 2 ◽

Post Hoc

PURPOSE: The aim of this study was to evaluate, in vitro, the quality of calcium hydroxide [Ca(OH)2] paste filling (Ultracal, Ultradent) associated or not with Ca(OH)2-containing gutta-percha points (Calcium Hydroxide Plus PointsTM, Roeko) in curved root canals. MATERIAL AND METHODS: One hundred and twenty roots of extracted human teeth, randomly divided into three curvature ranges (mild - 0 to 14º; moderate - 15º to 29º; severe - >30º) were used. After chemomechanical preparation, the roots were assigned to 4 groups (n=30), according to the technique of intracanal dressing placement: group 1 - Ca(OH)2 paste was applied with a lentulo spiral; group 2 - Ca(OH)2 paste was applied with a lentulo spiral and a Ca(OH)2 point was inserted into the canal; group 3 - Ca(OH)2 paste was applied with a NavitipTM tip (supplied with Ultracal system); group 4 - Ca(OH)2 paste was applied with a NavitipTM tip and a Ca(OH)2 point was inserted into the canal. The roots were cleared and the quality of apical third filling was assessed by a calibrated experienced examiner. The specimens were examined under stereomicroscopy and scored 1 to 4 (i.e., from inadequate to complete root canal filling). The results were analyzed statistically by ANOVA and Duncan's post hoc test at 5% significance level. RESULTS: There were no statistically significant differences (p>0.05) among the curvature degrees in groups 1, 3 and 4. Severely curved roots in group 2 presented bordering significance (p=0.05). The groups that associated the use of Ca(OH)2 paste and points (2 and 4) showed better apical filling than the other groups, but this difference was statistically significant (p<0.001) only for roots with severe curvature. CONCLUSION: According to the results of this study, the curvature degree did not influence the quality of filling. The techniques that used Ca(OH)2-containing gutta-percha points yielded better filling of the apical third in roots with severe curvature.

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