Find articles by Matthew R. Teeth that had an initial apical file size of more than a size 25 were discarded. YAG laser and irrigants are used on the dentin surface. Endosequdnce study focused on single rooted teeth based on previous studies and the fact that we wanted to demonstrate differences in less complex anatomy.
Cox2, 3, 4 Matthew R. The same volumes of sealer were used for both groups of teeth. This methodology, which has been successfully used in other studies, allows stepwise assessment by repeated scans of the same root specimen. The remaining volume of chloroform was introduced in the canals and any remaining gutta-percha was removed with paper points.
Black, root surface; white and orange, obturation material. Many new sealers have been endosequnece in the market; however, the retreatability of some of these sealers is still unknown. Groups 1A and 2A were retreated using chloroform; Groups 1B and 2B were retreated without chloroform.
In vitro fracture resistance of roots obturated with epoxy resin-based, mineral trioxide aggregate-based, and bioceramic root canal sealers. The quantity of chloroform was standardized between Groups 1A and 2A, and the same volume of sealer was used for all the groups. Briefly, for Groups 1A and 2A, Cavit was removed and a total of 0.
Risk assessment of the toxicity of solvents of gutta-percha used in endodontic retreatment. For WLs there were no significant differences between the groups. The results of this study demonstrate that the BC Sealer group had significantly more residual filling material than the AH Plus group regardless of whether or not both sealers were retreated with chloroform. It should be bacteriostatic or at least not encourage bacterial growth. It should set slowly. It should be insoluble in tissue fluids.
It should be well tolerated by the periapical tissue. It should be soluble in common solvents if it is necessary to remove the root canal filling. Table 1: Composition of calcium silicate based sealers. Sealer contents. Some Properties. Total Fill BC Sealer. Innovative BioCeramix Inc. Ortho MTA. Powder Tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetra calcium alumino ferrite, free calcium oxide, bismuth oxide and Liquid deionized water.
Tricalcium silicate, dicalciumsilicate, tantalum pentoxide, calcium phosphate monobasic, amorphous silicon oxide. EndoSeal, Maruchi, Seoul, Korea. Sodium oxide, calcium oxide, potassium oxide, magnesium oxide, iron oxide, aluminium oxide, titanium dioxide, zirconium oxide, silicone dioxide. Bismuth oxide is replaced with zirconium oxide as the radiopacifier in EndoSeal. Egeo, Buenos Aires, Argentina.
The same composition of MTA, except for the addition of barium sulfate and calcium chloride. MTA Plus. Has improved reactivity and a prolonged ability to release calcium. MTA Fillapex. Angelus, Londrina, PR, Brazil. Endosequence BC. Avalon Biomed. When the powder to gel ratio is low, a sealer type consistency is obtained for these two materials.
Quick Set2. AvalonBiomed Bradenton,FL. ProRoot Endo Sealer. Radioopacity, a well-known characteristic of endodontic sealers, should exist in any root canal filling materials with a certain degree in order to evaluate the quality of root filling function Malka, V.
Xuereb, M. The radiopacity of Endoseal was lower than AH Plus. Setting Time. The final setting time was determined to be Endosequence BC Sealer required at least hours to reach the final setting using the Gilmore needle method, and its microhardness significantly declined when water was included in the sealer Camilleri, J. These results are in contrast with another study, finding that the setting time of these materials is 2.
When there are minimal amounts of fluids in contact with the materials, dry conditions are not valid in vivo. An equivalent of 20 cm water pressure investigating the hydraulic conductance of dentin. Dentin permeability is mainly caused by the dentinal tubules present. Permeability in dentin can be reduced by the apposition of tertiary dentin, the deposition of crystalline calcium phosphate, or the presence of the smear layer and coagulation products.
Solubility is the mass loss of a material during a period of immersion in water. Similar solubility, but a higher dimensional change of Endoseal was observed between Endoseal and AH Plus. Calcium Release. For calcium ion release test, mostly, high release of calcium was indicated in the sealers in three hours assessment and by decreasing values over time.
Phosphorus was leached in solution in higher quantities in EndoSequence BC Sealer compared with MTA Fillapex, which exhibited a negative value, indicating that there was the uptake of phosphorus from the solution rather than leaching Xuereb, M. Zhang et al. Antibacterial activity of MTA Fillapex was related to the existence of resin as the main factor. MTA Fillapex sealer had the lowest pH at 3 and 24 hours approximately 7. Higher alkalinity, was observed in Endoseal when compared to AH Plus.
Loupes, Israel measured to the nearest hundredth. The push out test sealers MPa. Five different sized plungers with Interval for Mean diameter of 0.
Apexit Plus 4. No significant For each section, bond strength value MPa was differences were observed amongst the push-out calculated by dividing the failure load N by the strengths obtained from different locations in interface area between the root canal filling and Endosequence BC sealer. In case of MTA Fillapex dentine using the following formula.
At mid- the displacement of the sealer from the specimen. Apexit Plus with statistically significant differences Table 2: Push-out bond strength MPa to root dentine at each root third. In case of AH Plus In this study five different plungers 0. Correspondingly base orifice size of twice outcome and understanding of sealer adhesion to the plunger diameter was used in a manner that root canal walls according to the employed samples were centralized on base orifice and methodology, treatment of dentine surface and type plunger was centralized over the intracanal material of material.
Each sample was strength testing and bond strength was measured loaded in an apical to coronal direction to avoid through the conventional tensile test or shear test any interference because of root canal taper during on external dentinal surface. The same dentin is ambiguous and depends on the pattern of gutta-percha core material was used for all groups dentinal tubules, which differs not only from one since the elastic modulus of filling material has tooth to another but can also differ within the same effect on the push-out bond strength.
Thus, Gesi et al,[16] introduced the thin slice Results obtained in the present study indicated that push-out test for measuring interfacial strength of the push-out bond strength values were root canal sealers. The mean bond strength of AH Plus was large variation in methodology; canals prepared significantly higher than other groups except with burs and filled with sealers alone or long root EndoSequence BC sealer group.
A statistical cylinders were used during push-out test ranking for bond strength tests was obtained as setup. The results are in agreement with Sagsen have no advantages over conventional micro- B et al,[23] who observed that AH Plus and iRoot SP tensile and micro-shear bond testing. Emre Nagas et slices from different root thirds, despite the fact al,[24] reported significantly higher bond strength of that the diameter of root canal decreases towards iRoot SP bioceramic sealer as compared to AH the apical direction.
To overcome this problem Plus. However, in their study a single plunger was Stiegemeier et al,[18] utilized three different sized used for push-out of all samples obtained from plungers to closely match the diameter of the root coronal to apical regions and may be the reason of filling materials, obtained from different root variability of results. Oliveria et al,[25] found that levels. A similar experimental designs e.
The results are in similarity with might be superior in mechanical bonding to micro- those of Neelakantan et al,[36] Martins et al,[37] irregularities present in the dentin. The manufacturers suggest that this sealer bond strength of Endosequence BC sealer in the has features such as osteoconductivity, apical region may be due to higher flow of hydrophilicity, adhesiveness and chemical bonding Endosequence BC sealer as compared to AH to root canal dentinal walls.
Plus,[43] due to extremely low particle size of Results of our study also showed that MTA Endosequence BC that allows the sealer to fill the Fillapex had significantly lower bond strength than spaces of difficult access.
Similar that is co-precipitated within the calcium silicate results were obtained in a study by Sonmez et hydrate phase produces a composite-like structure, al[30] who compared the push-out bond strength of reinforcing the set cement. In the present study, the mode of bond failure was The results of this study are also in accordance with mainly cohesive followed by mixed failures for all several recent studies which reported lower bond groups.
Furthermore, Eldeniz et al,[45] percentage of gap containing regions observed due revealed that the failure mode appeared to be to lower adaptation of MTA Fillapex to canal walls predominantly cohesive within the sealer for AH because sealers containing salicylate in their Plus in the presence or absence of smear layer.
Similar results were observed in the study Apexit plus showed the least bond strength among of Vilanowa et al. The results are in agreement with the considerably higher numbers of adhesive failures study of Haragushiku GA et.
Our result also test. It has also been earlier reported attributed to the improved relation of punch: base that Apexit presents low adhesion to dentin,[12,14] orifice ratio in this study. Push-out bond significantly better than MTA Fillapex and Apexit strength was highest in the coronal and lowest in Plus.
Bond strength was significantly 2. Bond strength of all sealers except EndoSequence lower in apical third of all groups as compared to BC sealer is less, in the critical apical third of root middle and coronal specimens with the exception canal. The base orifice size has an impact on the bond Critical evaluation of the strength measurements in the push-out test design.
Push-out test for root canal filling materials. J Endod. Int Endod J. Using a laptop or desktop computer is recommended for best viewing the presentation. If registrants would like to ask a question or receive further clarification, they can type their questions or comments in the question box of the webinar system.
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