scholarly journals Distance From File Tip to Apical Constriction/Apical Foramen in Relation to Numeric Scale Reading on Display of Two Electronic Root Canal Length Determining Devices

2019 ◽  
Vol 8 (4) ◽  
pp. 1746-1750
Keyword(s):  
Root Canal ◽  
Glass Ionomer Cement ◽  
Operating Microscope ◽  
Glass Ionomer ◽  
Human Teeth ◽  
Apical Constriction ◽  
Actual Length ◽  
Scale Reading ◽  
Numeric Scale ◽  
Ionomer Cement

Modern Electronic root canal length determining devices (ERCLD) or Electronic apex locators (EALs), claim to determine accurately the tooth length based on the principle of measuring the impedance between the canal fluid and tip of the file with various frequencies. Many manufacturers claim the electronic apex locators (EALs) to exactly display the reading corresponding to the canal parameters. This invitro evaluation compared if the marks „„0.5‟‟ and „„0.0/APEX‟‟ on the of display of two EALs Sybron endo Apex ID (SID) and Mini apex locator (MINI) were accurately representing the apical constriction or the apical foramen respectively. Materials and Methods: Sixty extracted, single rooted human teeth were used with alginate model. The electronic length was determined using 2 EALs, at the numeric scale/target „„0.5‟‟ and „„0.0/APEX‟‟ mark using Kfile (electrode). After cementing the file coronally with type II glass ionomer cement, the apical 3–4 mm was trimmed until the file tip was visible under an operating microscope (X16). Images were captured under Dental operating microscope and the error between electronic length (EL) and actual length (AL) at target interval 0.5 (apical constriction) and 0.0 (major foramen) were analyzed by used Image J software. RESULTS: t-test revealed statistically significant differences between EL determination and AL for both EALs, at “0.0”/Apex, p=0.001, and at 0.5 (apical constriction) p=0.007. CONCLUSION: The numeric meter display of newer generation EALs like Apex ID, represent better correlation with the histologic landmarks and could become a useful guide for inexperienced clinicians, however they do not always indicate the position of the file in the canal.

scholarly journals The Effect of Altered pH on Push-Out Bond Strength of Biodentin, Glass Ionomer Cement, Mineral Trioxide Aggregate and Theracal

2015 ◽  
Vol 62 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Sameer Makkar ◽  
Ruchi Vashisht ◽  
Anita Kalsi ◽  
Pranav Gupta
Keyword(s):  
Bond Strength ◽  
Alkaline Medium ◽  
Gold Foil ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Mineral Trioxide Aggregate ◽  
Glass Ionomer ◽  
Human Teeth ◽  
Push Out ◽  
Ionomer Cement

Summary Introduction Throughout the history of dentistry, a wide variety of materials such as gold-foil, silver posts, amalgam, zinc oxide eugenol, glass ionomer cements, mineral trioxide aggregate have been used as retrograde fillings. Altered pH in periapical lesions can affect push-out bond strength of these materials. The aim of this study was to evaluate the effect of altered pH on push-out bond strength of Biodentin, Glass ionomer cement (GIC), Mineral trioxide aggregate (MTA) and Theracal. Material and Methods Forty-eight dentin slices of extracted single-rooted human teeth were sectioned and their canal portion instrumented to achieve a diameter of 1.4 mm. The specimens were then assigned into the four groups (one group for each material) with 12 samples in each group. All groups were further divided into 3 subgroups (with 4 specimens in each subgroup): acidic (butyric acid buffered at pH 6.4), neutral (phosphate buffer saline solution at pH 7.4) and alkaline (buffered potassium hydroxide at pH 8.4). Samples were incubated for 4 days at 37°C in acidic, neutral or alkaline medium. Push-out bond strength was measured using a Universal Testing Machine. The slices were examined under a stereomicroscope to determine the nature of bond failure. Results GIC showed the highest bond strength (33.33MPa) in neutral and acidic medium (26.75MPa) compared to other materials. Biodentin showed the best result in alkaline medium. Conclusion Altered pH level affected push-out bond strength of root end materials. GIC demonstrated good push-out bond strength that increased with decrease of pH whereas newer materials Biodentin and Theracal showed satisfying results in altered pH.

scholarly journals Push-Out Bond Strength of Resin-Modified Glass Ionomer Cement and Flowable Composite Luting Systems on Glass Fiber Post of Root Canal

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6908
Author(s):  
Jalison Jacob Cheruvathoor ◽  
Lincy Rachel Thomas ◽  
Lirin Ann Thomas ◽  
Madhuniranjanswamy Mahalakshmamma Shivanna ◽  
Pramod Machani ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Root Canal ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Flowable Composite ◽  
Luting Cement ◽  
Resin Modified Glass Ionomer ◽  
Push Out ◽  
Ionomer Cement

Background: Posts that have been properly fitted can withstand torsion forces and so provide better retention. The push-out bonding strength of glass fiber posts to the root canal was evaluated using resin-modified glass ionomer cement (RMGIC) and flowable composite (FC). Method: Forty single-rooted maxillary central incisors were used in the study. The samples were randomly divided into two groups of 20 teeth each. The crown-down procedure was used to clean and shape the pulp area. A Tenax fiber trans Coltene whaletene post was used by both groups. The first group utilized FC (Filtek Z 350 3M ESPE) to coat the post, whereas the second group used RMGIC (Rely X 3M ESPE). The specimens were cross-sectioned after 24 h. Specimens were cross-sectioned four millimeters thick into coronal and middle parts using a sectioning machine, yielding 40 specimens per group. The strength of the bond between the luting cement and the posts was measured using push-out bond strength testing. We loaded the components at a cross speed of 0.5 mm/min on a universal testing machine until the bond failed. Results: The FC group had a 4.80 N push-out bond strength, whereas the RMGIC group had a 7.11 N push-out bond strength. Conclusion: FC’s mean push-out bond strength score is lower than RMGIC’s.

scholarly journals An In Vitro Stereomicroscopic Evaluation of Bioactivity between Neo MTA Plus, Pro Root MTA, BIODENTINE & Glass Ionomer Cement Using Dye Penetration Method

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3159
Author(s):  
Mohmed Isaqali Karobari ◽  
Syed Nahid Basheer ◽  
Fazlur Rahman Sayed ◽  
Sufiyan Shaikh ◽  
Muhammad Atif Saleem Agwan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Root Canal ◽  
Glass Ionomer Cement ◽  
Filling Material ◽  
Glass Ionomer ◽  
Dye Penetration ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Ionomer Cement

The ideal root end filling material should form a tight seal in the root canal by adhering to the cavity walls. Several materials have been used for root end filling. The present study aims to find out and compare the bioactivity of Neo MTA Plus, Pro Root MTA White, BIODENTINE & glass ionomer cement as root end filling materials using 1% methylene blue as tracer. Materials and methods: 80 extracted human permanent maxillary anterior teeth were used in the study. They were divided into four groups. Specimens were sectioned transversely in the cervical area to separate the crown from the root. The root canal was obturated with gutta percha and zinc oxide eugenol sealers. Thereafter, each sample was resected apically by removing 3 mm of the apex and filled with different materials. Samples were kept in buffering solution at 37 °C until the recommended evaluation periods. The specimens were then suspended in 1% methylene blue for 24 h, prior to the analysis. The teeth were then sectioned, and dye penetration was examined, photographed, and evaluated under a stereomicroscope. Results: Vertical dye penetration showed significant differences across different groups. The minimum dye penetration was seen in Neo MTA plus followed by BIODENTINE, Pro Root MTA and maximum in GIC. There was no significant difference in dye penetration between Neo MTA plus and BIODENTINE both at fifteen days and one-month intervals. Conclusion: The present study suggests Neo MTA plus and BIODENTINE should be the preferred material for root end filling.

scholarly journals Evaluation of microleakage in human, bovine and swine enamels

2004 ◽  
Vol 18 (4) ◽  
pp. 312-316 ◽  
Author(s):  
Allan Abuabara ◽  
Alex José Souza dos Santos ◽  
Flavio Henrique Baggio Aguiar ◽  
José Roberto Lovadino
Keyword(s):  
Composite Resin ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Methylene Blue Solution ◽  
Laboratory Studies ◽  
Human Teeth ◽  
Human Enamel ◽  
Blue Solution ◽  
Ionomer Cement

The suitability of bovine and swine teeth has been evaluated when they are used as substitutes for extracted human teeth in varied researches. This study evaluated in vitro the marginal microleakage in human, bovine and swine enamel. Cubic cavities (2 x 2 x 2 mm³) were prepared in enamel blocks from human, swine and bovine teeth. The cavities were filled with composite resin and conventional glass-ionomer cement. All the samples were thermocycled for 1,000 cycles (5 ± 2°C - 55 ± 2°C) and immersed in 2% methylene blue solution for 12 hours. The microleakage was quantified by a spectrophotometric technique. The results were statistically analyzed using ANOVA and Tukey's test. The glass-ionomer cement presented significantly higher leakage means (µg/ml ± SD) than the composite resin for all substrates (0.0695 ± 0.01313 vs. 0.0471 ± 0.0163, p < 0.01). No significant differences were found between bovine and swine enamel (0.0668 ± 0.0246 vs. 0.0674 ± 0.0286); however, both presented statistically higher leakage means than human enamel (0.0407 ± 0.0195, p < 0.01). It was concluded that the microleakage pattern was affected by substrates, and that bovine and swine substrates allow higher marginal leakage than human substrates. The results indicate there should be precaution in the substitution of human substrate in laboratory studies of microleakage.

Maturogenesis of a Cariously Exposed Immature Permanent Tooth using Calcium Hydroxide for Pulpotomy Treatment: A Case Report

2013 ◽  
Vol 1 (2) ◽  
pp. 21-24
Author(s):  
SM Abdul Quader ◽  
Iqbal Bahar ◽  
KM Rownak Jahan
Keyword(s):  
Case Report ◽  
Calcium Hydroxide ◽  
Root Development ◽  
Root Canal ◽  
Glass Ionomer Cement ◽  
Permanent Tooth ◽  
Permanent Teeth ◽  
Glass Ionomer ◽  
Ionomer Cement

With all aseptic precaution successful pulpotomy treatment of cariuosly exposed permanent teeth with reversible pulpitis and incomplete apex formation can prevent the need for root canal treatment. A case report is presented which demonstrates the use of pulpotomy with calcium hydroxide in order to achieve apexogenesis and the teeth were restored with glass ionomer cement. Clinical and radiographic follow up demonstrated a vital pulp and physiologic root development in comparison with the contra lateral tooth.DOI: http://dx.doi.org/10.3329/updcj.v1i2.13982 Update Dent. Coll. j. 2011: 1(2): 21-24

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