scholarly journals Comparison of Shaping Ability between Continuous Rotary and Manual Instrumentations in Pediatric Endodontics

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
Burcu Güçyetmez Topal ◽  
◽  
Seda Falakaloğlu ◽  
Hatice Türkoğlu ◽  
◽  
...  
Keyword(s):  
Primary Teeth ◽  
Primary Root ◽  
In Vitro Study ◽  
Primary Molars ◽  
Preparation Time ◽  
Root Canals ◽  
Apical Transportation ◽  
Canal Transportation ◽  
Shaping Ability

Objective: The aim of this in vitro study was to evaluate the efficacy of rotary EndoArt Ni-Ti Gold Pedo Kit and K-files in shaping ability, canal transportation, centering ability and instrumentation time in primary molars. Methods: For the study total of 30 extracted primary molars root with minimum 7mm root length were selected. Shaping of root canals in primary molars were done using the two systems, and CBCT and specialized software were used for scanning and analysis of pre-operative and post-operative to evaluate the groups for their shaping properties, apical transportation and preparation time in primary root canals. Results: No differences were found in canal transportation measures and instrumentation time between the two groups (p>0.05). The EndoArt group removed more dentin compared to K-file in all sides of the root curvature. The statistical differences were significant for coronal and middle third of the root (p<0.05). Conclusions: Under the conditions of this study, rotary EndoArt Ni-Ti Gold Pedo Kit provided more conical canals than K-files in primary teeth.

scholarly journals Shaping ability of two heat treated rotary NiTi instruments using different kinematics/in vitro study

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Engy M. Kataia ◽  
Mohamed Mokhtar Nagy ◽  
Mohamed M. Kataia ◽  
Hala Fayek Khalil
Keyword(s):  
In Vitro Study ◽  
Preparation Time ◽  
Heat Treated ◽  
Significant Difference ◽  
Before And After ◽  
Canal Transportation ◽  
Niti Instruments ◽  
Post Hoc ◽  
Shaping Ability

Abstract Background Comparing shaping ability of Azure and Fanta AF One in rotation and reciprocation. This study was conducted on 40 resin blocks, having canal curvatures 30°-angle and of 16-mm length. The blocks were assigned to 4-groups according to the instrument and motion used: Azure/Rotation (A/Rt), Fanta AF one/Rotation (F/Rt), Azure/Reciprocation (A/Rec) and Fanta AF one/Reciprocation (F/Rec). For both systems single file 25, taper 0.06 were used. Digital images were taken before and after instrumentation. Adobe Photoshop was used to overlap post and pre-instrumentation images to assess canal transportation at 1, 4, 7-mm; representing apical, middle and cervical levels respectively. Stopwatch was used to document the time taken for canal preparation. One-way ANOVA followed by Tukey post hoc test, used to compare between more than two groups in non-related samples. Results At the apical level, no statistically significant difference was found between both files in either rotation or reciprocation. However, reciprocation motion showed significantly lower transportation levels in both files. No significant difference was found among groups at the middle and cervical levels. Regarding preparation time, Reciprocation in both groups was significantly longer. Conclusions The use of reciprocation motion showed minimized apical canal transportation in both files however in longer preparation time.

scholarly journals Aspects of the biomechanical root canal treatment – step-back technique. In vitro study

2015 ◽  
Vol 61 (4) ◽  
pp. 304-310
Author(s):  
Monica Voiculeanu ◽  
◽  
Ioana Suciu ◽  
Bogdan Dimitriu ◽  
Mihaela Grigore ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Root Canal ◽  
In Vitro Study ◽  
Final Shape ◽  
Root Canals ◽  
Apical Transportation ◽  
Canal Transportation ◽  
Preparation Errors ◽  
Treatment Step

Evaluation of post-operative root canal shape have been performed using simulated root canals in resin blocks and magnification analysis (stereomicroscope) have been used for the study. The technique selected was stepback with conventional hand stainless steel instruments. The aim of studies on post-operative root canal shape is to evaluate the conicity, taper and flow and maintenance of original canal shape and to record the degree and frequency of straightening, apical transportation, ledging, zipping, teardrops, elbows. Ideal preparation forms for the root canals can be possible without any preparation errors with circular incorporation of the original canal cross section – if the technique starts with adequately precurved negotiating files. Preparation errors (zips, canal transportation, apical perforations, elbows, teardrops, etc) can occur mostly when stainless steel hand instruments (K-file) are used for moderate to severe curved of root canals, especially K-file with cutting tips and not prebent. Ideal preparation shape without any preparation errors could be a final shape and adequate shape even for conventional hand files and step-back technique. For the first area of step back technique, even for the begining, we can usually use various prebent stainless steel hand instruments for pathfinding. In many cases, conventional hand instruments produces adequate shapes for the root canals. For this final shape, is important to use adequately precurved negotiating files. Conventional stainless stell are rigid enough that thay should be precurved to match the curvature of the canal during instrumentation. Conventional hand instruments has two basic design, Kerr-file and Kerr-reamer. Kerr-file could be used to enlarge the canal with a longitudinal filing action. Kerr-reamer may used in a same fashion, but is much more flexible instrument than K-file. Noncutting tip follow the canal better than instruments with active tips – clinically usefull element.

scholarly journals Comparative Evaluation of The Efficacy Of Rotary file system (Kedo-S) Vs Hand K-Files In Root Canal Preparation Of Primary Teeth Using Cone Beam Computed Tomography (CBCT) - An In Vitro Study

2019 ◽  
Vol 22 (2) ◽  
pp. 197-202
Author(s):  
Abhinaya Srinivas ◽  
LGanesh Jeevanandan ◽  
Lavanya Govindaraju ◽  
Erulappan Muthu Ganapathi Subramanian
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Primary Teeth ◽  
File System ◽  
In Vitro Study ◽  
Cone Beam ◽  
Root Canal Preparation ◽  
Group I ◽  
Shaping Ability

Objective: To evaluate the efficacy of rotary Kedo-S and hand K-files in shaping ability in primary canines using cone beam computed tomography. Materials and Methods: Thirty extracted primary maxillary and mandibular canines were selected. Using cone beam computed tomography the teeth were scanned before instrumentation. In Group I, the teeth were prepared using stainless steel K file up to the size of 40. In the Group II teeth, U1 size Kedo-S rotary file was used in crown down technique. The instrumented teeth were scanned again with cone beam computed tomography and the images were compared. Results: The canal taper was more conical for rotary Kedo-S files as compared to K-files, which was statistically significant. Conclusion:  Canal preparation with Rotary files resulted in more conical canals when compared to manual instrumentation in primary teeth that contributes to more uniform obturation.KeywordsCBCT; Hand K-files; Kedo-S file system; Primary teeth; Pulpectomy; Rotary instrumentation.

Effect of Calcium Hydroxide as a Root Canal Dressing Material on Dentin Fracture Strength In Primary Teeth–In Vitro Study

2018 ◽  
Vol 42 (2) ◽  
pp. 146-149
Author(s):  
Fadi Said ◽  
Moti Moskovitz
Keyword(s):  
Calcium Hydroxide ◽  
Fracture Strength ◽  
Root Canal ◽  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Canal Treatment ◽  
Root Canals ◽  
Anterior Teeth

Objectives: The aim of the present study was to assess the effect of calcium hydroxide as a root canal dressing material on dentin microtensile fracture strength in human primary teeth in vitro. Study design: Thirty primary anterior teeth with root canals packed with calcium hydroxide were divided into groups of ten and immersed in saline at room temperature for 7, 30 and 90 days. Ten teeth with root canals filled with sterile saline were the control group. Microtensile fracture strength was measured in Mechanical tester Lloyd testing machine. Results: There was a significant difference (P &lt; 0.05) between the fracture strength of the calcium hydroxide-filled teeth after 90 days (19.1 MPa) compared with the control (35.8 MPa). Dentin microtensile fracture strength of the calcium hydroxide-filled teeth decreased at an average of 0.142 MPa per day. Conclusion: Calcium hydroxide placed in root canals for an extended time had a significantly negative effect on root strength. Long-term success of root canal treatment in primary anterior teeth is estimated as 65% with most of the failures result from trauma recurrence. Clinical Relevance: Our results stress the need to evaluate the pros and cons of root canal treatment compared to extractions of non-vital primary incisors.

scholarly journals Volumetric Assessment of Root Canal Obturation Using 3% Nano-Chitosan Versus Zinc Oxide Eugenol (ZOE) and Iodoform-Calcium Hydroxide (Metapex), in Primary Root Canals Shaped with Rotary Versus Manual Methods: A Preliminary In-Vitro Spiral CT Study

2019 ◽  
Author(s):  
Elahe Babashahi ◽  
Maryam Mohmadi Kartalaie ◽  
Leila Basir ◽  
Vahid Rakhshan4
Keyword(s):  
Zinc Oxide ◽  
Calcium Hydroxide ◽  
Primary Root ◽  
In Vitro Study ◽  
The Other ◽  
Root Canals ◽  
Zinc Oxide Eugenol ◽  
Volumetric Assessment ◽  
The Difference

Objectives: In this study, chitosan was introduced and used as a substitute for pulpectomy obturation against conventional materials: zinc oxide eugenol (ZOE) and iodoform-calcium hydroxide (Ca(OH)2) compounds. Also, efficacies of rotary versus manual instrumentations were compared. Materials and Methods: This preliminary in-vitro study was performed on 152 intact non-resorbed root canals of primary molars divided into rotary (n=78) versus hand-instrumentation (n=74) and also into ZOE (n=53), iodoform-Ca(OH)2 (n=50), and 3% nano-chitosan (n=49). Canals were cleaned/shaped using hand or rotary files. Canal spaces were measured using spiral computed tomography (CT). Canals were then obturated using the three materials. The percentages of obturation volume (POV) were estimated. Rotary and manual instrumentations were compared in terms of canal spaces before and after obturation. Three obturation materials were compared in terms of canal spaces after obturation (α=0.05). Results: Average POVs of materials were 96.54% (ZOE), 97.87% (Metapex), and 74.74% (nano-chitosan; P=0.000). POV of chitosan differed from the other two (P=0.000) but the other two were similar (P=0.896). Average POVs were 91.46% (manual) and 88.51% (rotary); the difference was not significant (P=0.322). Pre-obturation spaces of canals for different methods were 3.89 mm3 (manual) and 3.26 mm3 (rotary); the difference was significant (P=0.013). Two-way ANCOVA showed a significant effect of materials (P=0.000) but not root length (P=0.585) or shaping methods (P=0.362) on POVs. Conclusions: Nano-chitosan showed a considerable success rate but it still needs reformulation as it was weaker than the extremely successful commercial competitors. Rotary instrumentation can provide results similar to hand-filing in terms of POV although it might yield smaller canals.

scholarly journals Comparison of the canal transportation of ProTaper GOLD, WaveOne GOLD, and TruNatomy in simulated double-curved canals

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
HyeWon Kim ◽  
Su-Jin Jeon ◽  
Min-Seock Seo
Keyword(s):  
Preparation Time ◽  
Root Canals ◽  
Shaping Time ◽  
Significant Difference ◽  
Canal Transportation ◽  
Shaping Ability ◽  
One Way Anova ◽  
Different Levels ◽  
Paired T Test ◽  
Better Than

Abstract Background In root canal preparations, it is important to maintain the original canal shape. However, it is difficult to accomplish this, especially due to the complex canal anatomy. This study aimed to compare the shaping ability of the ProTaper GOLD, WaveOne GOLD, and newly developed TruNatomy in simulated S-shaped canals. Methods The root canals of 60 S-shaped resin blocks were dyed using ink and photographed. The blocks were then randomly divided into three groups: group ProTaper GOLD (n = 20), WaveOne GOLD (n = 20), and TruNatomy (n = 20). The simulated canals were instrumented according to the NiTi file system and photographed again after being dyed with red ink. The pre- and post-preparation images were superimposed, and the amount of resin removed from both the mesial and distal sides of the canal measured up to 9 mm from the apical terminus, with a 1 mm increment. The preparation time was also calculated. A paired t-test was used to determine the degree of deviation at different levels within the groups. To compare the degree of transportation at different levels between the groups, one-way ANOVA and Kruskal–Wallis tests were performed according to the normality. Results TruNatomy showed a significant deviation between the mesial and distal sides of the canal only in the coronal area at 6, 7, 8, and 9 mm levels of the canal (p < 0.05). When comparing the amount of transportation in the 3 groups at 9 different levels, TruNatomy showed significantly less canal transportation than the other groups at the 3-and 5-mm levels of the canal (p < 0.05), while ProTaper GOLD showed the largest amount of transportation in the apical curved area at the 2 and 3 mm levels (p < 0.05). TruNatomy removed less resin than other groups in all sections (p < 0.05), while ProTaper GOLD removed slightly more resin than WaveOne GOLD; however, there was no significant difference (p = 0.043). Shaping time was the least for TruNatomy, followed by the WaveOne GOLD and ProTaper GOLD (p < 0.05). Conclusions TruNatomy maintained the original apical canal curvature in S-shaped curved canals better than ProTaper GOLD and WaveOne GOLD.

Comparison of shaping ability of three different rotary instruments in simulated root canals using computer image analysis: An in vitro study

2015 ◽  
Vol 2 (1) ◽  
pp. 8
Author(s):  
SUma Maheswari ◽  
JonathanEmil Sam ◽  
AArvind Kumar ◽  
Jacob Raja ◽  
RGnana Seelan ◽  
...  
Keyword(s):  
Image Analysis ◽  
Computer Image ◽  
In Vitro Study ◽  
Vitro Study ◽  
Computer Image Analysis ◽  
Root Canals ◽  
Rotary Instruments ◽  
Shaping Ability

scholarly journals A comparison of root canal preparations using stainless steel, Ni-Ti hand, and Ni-Ti engine-driven endodontic instruments – an in vitro study

1970 ◽  
Vol 9 (4) ◽  
pp. 223-230
Author(s):  
Krishna Prasad Parvathaneni ◽  
Beena Rani Goel ◽  
Bharani Devi Parvathaneni
Keyword(s):  
Stainless Steel ◽  
Medical Science ◽  
In Vitro Study ◽  
Vitro Study ◽  
The Other ◽  
Preparation Time ◽  
Group I ◽  
Working Length ◽  
Apical Transportation

The main advantage of nickel titanium instruments is that they permit canal preparation with less transportation and ledging. Hand used Ni-Ti and rotary Ni-Ti instruments have a wider range of elastic deformation and greater flexibility. The aim of the present study was to evaluate and compare the preparation time, loss of working length, apical transportation, instrument deformation and fracture with stainless steel, Ni-Ti hand and Ni-Ti rotary endodontic instruments. Fifty freshly extracted human mandibular molars with curved roots were collected and stored in 10% formalin. The samples were divided into 3 groups of 15 each. The access opening was made for each tooth and the biomechanical preparation was carried out using crown down pressureless technique in all the groups. Group I was instrumented with stainless steel files, group II with hand Ni-Ti and group III with Ni-Ti rotary files. The preparation time to enlarge each canal was recorded in minutes and seconds, which included only active instrumentation. Following preparation, the final length of each canal was subtracted from the original length to give the loss of working length. SEM photographs of the deformed and fractured instruments were taken. The apical transportation was measured using computer software (Microdraw 4.1). The readings were noted and statistically analyzed.The results of this in vitro study showed that the mean preparation time was less with Ni- Ti rotary (1.85 min) when compared to hand Ni-Ti (6.33) and stainless steel files (6.73), which was statistically significant. The loss of working length was more for stainless steel group which was statistically significant (P<0.05) when compared with the other 2 groups.One instrument in stainless steel and one in Ni-Ti rotary files were fractured. Only one instrument in stainless steel file deformed permanently. Apical transportation was found to be greater in stainless steel group than other groups (P<0.01) which was statistically significant. Considering the parameters in this study, Ni-Ti rotary files proved to perform better than the other two groups. Key words: Canal preparation; crown-down pressure less technique; double exposure radiographic technique. DOI: 10.3329/bjms.v9i4.6689Bangladesh Journal of Medical Science Vol.09 No.4 July 2010 pp.223-230

In vitro study assessing apical leakage of sealer-only backfills in root canals of primary teeth

2007 ◽  
Vol 35 (7) ◽  
pp. 607-613 ◽  
Author(s):  
A.M. Kielbassa ◽  
H. Uchtmann ◽  
K.-T. Wrbas ◽  
K. Bitter
Keyword(s):  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Canals ◽  
Apical Leakage
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