Influence of Root Canal Filling Techniques on Sealer Penetration and Bond Strength to Dentin

Macedo, Luciana Martins Domingues de; Silva‐Sousa, Yara Teresinha Corrêa; Silva, Sílvio Rocha Corrêa da; Baratto, Samantha Schaffer Pugsley; Baratto‐Filho, Flares; Rached-Junior, Fuad Jacob Abi

doi:10.1590/0103-6440201602460

Cited by 15 publications

(6 citation statements)

References 22 publications

(24 reference statements)

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“…Higher bond strength values were observed at the middle and apical thirds, and this result possibly may be related with the forces applied during the lateral compaction when root canal filling was performed (21,22). Such force increases the frictional strength of the sealer against the root canal walls, and consequently, contributes to the adhesion of the sealer to dentin substrate (4,22).…”

Section: Discussionmentioning

confidence: 99%

“…Despite the lack of correlation between these variables, the penetration of sealers into dentinal tubules still is considered beneficial (22). The presence of sealer into dentinal tubules increases the mechanical interlocking (12); and creates a physical barrier that may confine remaining microorganisms, enhancing the antibacterial effect of the sealer (23).…”

Section: Discussionmentioning

confidence: 99%

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Correlation between Bond Strength to Dentin and Sealers Penetration by Push-Out Test and CLSM Analysis

et al. 2019

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This study correlated the bond strength (BS) and dentin penetration of different sealers by push-out test and Confocal Laser Scanning Microscopy (CLSM) analysis. Forty-five root canals were prepared according to the crown-down technique and filled with gutta-percha associated to the following sealers (n=15): Endofill, AH Plus and MTA Fillapex. Five canals of each group were filled with the sealers added with 0.1% Rhodamine B dye. Next, the specimens were transversely sectioned and submitted to the push-out test (n=10) and CLSM analysis (n=5). The BS data showed the following means (MPa) and standard deviation: AH Plus (4.17±1.86); MTA Fillapex (3.13±1.96) and Endofill (2.10±1.03). Statistical analysis (two-way ANOVA, α=0.05) showed significant difference among sealers (p<0.001) and root canal thirds (p<0.001). The BS results of Endofill and MTA Fillapex were statistically similar (p>0.05), however, they were statistically different from AH Plus (p<0.001). The regional analysis of BS showed similarity between middle and apical thirds (p>0.05), and both were different from coronal portion (p<0.001). CLSM analysis verified tags formation in all groups and higher penetration of the specimens filled with AH Plus (p<0.05). The Kendall test (correlation between BS to dentin and sealer penetration into dentinal tubules) and the Pearson test (between failures pattern and sealer penetration into dentinal tubules) did not show correlation between the variables evaluated for all the tested sealers (p>0.05). AH Plus group had higher BS to dentin, and deeper tags formation than the other sealers. There was no significant correlation between BS and intratubular penetration of the tested sealers.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Correlation between Bond Strength to Dentin and Sealers Penetration by Push-Out Test and CLSM Analysis

et al. 2019

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“…Endodontic sealers must fill irregularities and areas that are difficult to access (23). AH Plus has sealing capacity (18) and promotes adaptation in the root canal walls (24), and is compatible with thermal compaction techniques (25). Proper filling was observed for continuous wave of condensation evaluated by micro-CT in mesial root canals from mandibular molars (13,14) and mandibular premolars (7,9,10).…”

Section: Discussionmentioning

confidence: 99%

Continuous Wave of Condensation Improves the Filling of Curved Canals: a Micro-CT Study

Pinto

Pivoto-João²,

Guerreiro-Tanomaru³

et al. 2023

Odovtos - Int J Dent Sc

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The aim of this study was to compare the filling capacity in curved root canal using a new continuous wave of condensation technique (Termo Pack II, Easy Dental Equipments, Brazil) or lateral compaction. The percentage of voids in the filling of mesial root canals of mandibular molars was assessed by micro-computed tomography (micro-CT). Mesial root canals (n=24) of mandibular molars with a degree of curvature between 20° and 40° were prepared using rotary system (ProDesign Logic, Easy, Brazil) up to #35, .05 taper. The root canals were filled by using the continuous wave of condensation system or lateral compaction and AH Plus sealer (n=12). Scanning at 9 µm was performed after preparation and after filling by using micro-CT SkyScan 1176. The volumetric percentage of filling material and voids (total length and in each root canal third) were calculated. Data were analyzed using ANOVA/Tukey and Student’s t tests (α=0.05). Before the filling techniques, the root canals volume after preparation was similar (p>0.05). The root canals filled by the continuous wave of condensation technique presented the lowest percentage of voids, and the greatest percentage of filling material in total length and thirds (cervical, middle and apical) (p<0.05). Both techniques were not able of completely filling the root canals. The continuous wave of condensation technique Termo Pack II promoted better root canal filling in curved root canals, when compared with lateral compaction.

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“…However, at the middle third there was minimal sealer penetration. This could be attributed to the fact that, when the root canal obturated with lateral condensation technique, finger spreader and gutta-percha cones exert pressure that is directed to the root canal walls resulting in lateral forces especially at middle third which favored sealer penetration into dentinal tubules (27) . This finding was correlated with another study which reported that AH plus sealer penetration into dentinal tubules was noticed when NaOCl used alone to irrigate the root canal without any chelating agent (28) .…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of Chitosan as Final Irrigating Solution on Bond Strength of Resin Based Sealer to Radicular Dentin

Hashem¹,

Fawzy²,

Bastawy³

2019

ADJ-for Girls

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Purpose: This study was designed to assess the impact of Chitosan-acetate as final root canal irrigant on bond strength of resin-based sealer to radicular dentin. Materials and Methods: Forty extracted human lower premolars with single roots and canals were prepared with ProTaper Universal rotary files till size F4. The samples were dispensed into 3 experimental groups according to the final rinse used and control group (10 samples each); Group I: irrigated with 0.2% chitosan acetate, Group II:17% EDTA, Group III: distilled water and control group (IV): saline. The samples were obturated by cold lateral compaction technique using AH plus sealer. Samples were sectioned into three sections (each 2 mm-thickness) from coronal, middle and apical thirds of each sample. The push out bond strength test was performed using universal testing machine. Three sections from each group were split longitudinally in buccolingual di-rection where the sealer/dentin interface and the sealer penetration inside the dentinal tubules was evaluated using scanning electron microscope (SEM). Results: Regarding the coronal and middle levels, there was no statistical significant difference among the tested groups. However, at the apical level, there was a statistical significant difference among the tested groups. SEM observation revealed minimal sealer penetration in group I at the apical level, while in group II, there was minimal sealer penetration at the coronal and middle levels. Regarding group III, there was minimal sealer penetration at middle level, while in control group (IV), there was no sealer penetration. Conclusion:The effect of 0.2% Chitosan acetate on the push out bond strength of AH Plus sealer was comparable to that of 17% EDTA when used as a final rinse. AH Plus sealer showed better adhesion to the dentin in the presence of smear layer especially at the apical third.

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Influence of Root Canal Filling Techniques on Sealer Penetration and Bond Strength to Dentin

Cited by 15 publications

References 22 publications

Correlation between Bond Strength to Dentin and Sealers Penetration by Push-Out Test and CLSM Analysis

Correlation between Bond Strength to Dentin and Sealers Penetration by Push-Out Test and CLSM Analysis

Continuous Wave of Condensation Improves the Filling of Curved Canals: a Micro-CT Study

Effectiveness of Chitosan as Final Irrigating Solution on Bond Strength of Resin Based Sealer to Radicular Dentin

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