Retention of Root Canal Posts: Effect of Cement Film Thickness, Luting Cement, and Post Pretreatment

2015 ◽  
Vol 40 (4) ◽  
pp. E149-E157 ◽  
Author(s):  
A Sahafi ◽  
AR Benetti ◽  
S Flury ◽  
A Peutzfeldt
Keyword(s):  
Film Thickness ◽  
Root Canal ◽  
Zinc Phosphate ◽  
Resin Cement ◽  
Luting Cements ◽  
Silicate Coating ◽  
Root Canals ◽  
Pull Out ◽  
Luting Cement ◽  
Self Etch

SUMMARY The aim of this study was to investigate the effect of the cement film thickness of a zinc phosphate or a resin cement on retention of untreated and pretreated root canal posts. Prefabricated zirconia posts (CosmoPost: 1.4 mm) and two types of luting cements (a zinc phosphate cement [DeTrey Zinc] and a self-etch adhesive resin cement [Panavia F2.0]) were used. After removal of the crowns of 360 extracted premolars, canines, or incisors, the root canals were prepared with a parallel-sided drill system to three different final diameters. Half the posts did not receive any pretreatment. The other half received tribochemical silicate coating according to the manufacturer's instructions. Posts were then luted in the prepared root canals (n=30 per group). Following water storage at 37°C for seven days, retention of the posts was determined by the pull-out method. Irrespective of the luting cement, pretreatment with tribochemical silicate coating significantly increased retention of the posts. Increased cement film thickness resulted in decreased retention of untreated posts and of pretreated posts luted with zinc phosphate cement. Increased cement film thickness had no influence on retention of pretreated posts luted with resin cement. Thus, retention of the posts was influenced by the type of luting cement, by the cement film thickness, and by the post pretreatment.

Comparison of the Solubility of Conventional Luting Cements with that of the Polyacid Modified Composite Luting Cement and Resin-modified Glass Ionomer Cement

2016 ◽  
Vol 17 (12) ◽  
pp. 1016-1021 ◽  
Author(s):  
Mathew Thomas ◽  
Mohammed Mustafa ◽  
Reshma Karkera ◽  
AP Nirmal Raj ◽  
Lijo Isaac ◽  
...  
Keyword(s):  
Zinc Phosphate ◽  
Glass Ionomer Cement ◽  
Resin Cement ◽  
Glass Ionomer ◽  
Time Intervals ◽  
Luting Cements ◽  
Luting Cement ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

ABSTRACT Introduction This study was planned to find the solubility of the conventional luting cements in comparison with that of the polyacid-modified composite luting cement and recently introduced resin-modified glass ionomer cement (RMGIC) with exposure to water at early stages of mixing. Materials and methods An in vitro study of the solubility of the following five commercially available luting cements, viz., glass ionomer cement (GIC) (Fuji I, GC), zinc phosphate (Elite 100, GC), polyacid-modified resin cement (PMCR) (Principle, Dentsply), polycarboxylate cement (PC) (Poly - F, Dentsply), RMGIC (Vitremer, 3M), was conducted. For each of these groups of cements, three resin holders were prepared containing two circular cavities of 5 mm diameter and 2 mm depth. All the cements to be studied were mixed in 30 seconds and then placed in the prepared cavities in the resin cement holder for 30 seconds. Results From all of the observed luting cements, PMCR cement had shown the lowest mean loss of substance at all immersion times and RMGIC showed the highest mean loss of substance at all immersion times in water from 2 to 8 minutes. The solubility of cements decreased by 38% for GIC, 33% for ZnPO4, 50% for PMCR, 29% for PC, and 17% for RMGIC. Conclusion The PMCR cement (Principle-Dentsply) had shown lowest solubility to water at the given time intervals of immersion. This was followed by PC, zinc phosphate, and GIC to various time intervals of immersion. How to cite this article Karkera R, Nirmal Raj AP, Isaac L, Mustafa M, Reddy RN, Thomas M. Comparison of the Solubility of Conventional Luting Cements with that of the Polyacid Modified Composite Luting Cement and Resin-modified Glass Ionomer Cement. J Contemp Dent Pract 2016;17(12):1016-1021.

scholarly journals Effect of Luting Cement Film Thickness on the Pull-Out Bond Strength of Endodontic Post Systems

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3082
Author(s):  
Khalil Aleisa ◽  
Syed Rashid Habib ◽  
Abdul Sadekh Ansari ◽  
Ragad Altayyar ◽  
Shahad Alharbi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Film Thickness ◽  
Testing Machine ◽  
Resin Cement ◽  
Cement Interface ◽  
Pull Out ◽  
Modes Of Failure ◽  
Fiber Posts ◽  
Luting Cement ◽  
Group A

Optimal bond strength between the prefabricated post/dowel to the surrounding dentin is essential. The present study aimed to analyze and compare the effect of three different cement film thicknesses on the pull-out bond strength of three different prefabricated post systems. Extracted natural teeth (N = 90) with similar root dimensions were acquired. Teeth were mounted in resin blocks, endodontically treated, sectioned at cemento-enamel junction, divided into three groups (A: Parapost Fiber Lux plus; B: 3M ESPE Relyx fiber post; and C: Parapost XP), and stored. Uniform post spaces were prepared for the groups (A and C: Length = 8 mm, Width = 1.5 mm; B: Length = 8 mm, Width = 1.6 mm). Each group (N = 30) was further subdivided into three subgroups (n = 10) based on the size (4, 5, and 6) of the post and cemented with resin cement (MultiLink-N, Ivoclar Vivadent). After thermocycling, the specimens were subjected to a pull-out test using a universal testing machine, and tensile force was recorded (MPa). Digital microscopic evaluations were performed for modes of failure. ANOVA and Tukey-HSD tests were used for statistics. Significant differences were observed for each tested material (p = 0.000). The lowest and highest bond strength values were recorded for Group C (Titanium post) and Group A (000), respectively. Multiple comparisons showed significance (p < 0.05) among all the groups, except for space 1 and space 2 (p = 0.316) for Group A. Most of the failures occurred within the cement-dentin and post-cement interface (Adhesive failures, 73.5%). An increase in the luting cement film thickness results in the decrease in pull-out bond strength of prefabricated posts luted with resin cement, irrespective of the type/material/shape of the post. The serrated fiber posts showed the highest pull-out bond strength compared to the smooth surfaced fiber posts or serrated metal posts. Increased pull-out bond strengths were observed when appropriate post space was created with the same sized drill as the post size.

scholarly journals Effect of a sonic device on bonding of fiberglass posts to root canals

2018 ◽  
Vol 17 ◽  
pp. e18924
Author(s):  
Marina de Almeida Salim ◽  
Thais Mageste Duque ◽  
Heloisa Carla Dell Santo Gusman ◽  
Carolina Oliveira de Lima ◽  
Brenda Paula Figueiredo de Almeida Gomes ◽  
...  
Keyword(s):  
Root Canal ◽  
Adhesive System ◽  
Resin Cement ◽  
Root Canal Filling ◽  
Root Canals ◽  
Gutta Percha ◽  
Ah Plus ◽  
Root Dentin ◽  
Post Hoc ◽  
Adhesive Cement

Aim: This study evaluated the effect of a sonic device on the bonding of fiberglass posts cemented with a self-etching adhesive combined with conventional cement or a self-adhesive cement to root dentin. Methods: Forty single-rooted bovine incisors were endodontically prepared using a step-back technique. Gutta-percha and AH Plus sealer were used for root canal filling, combined with a thermoplasticization technique. After 1 week, the post space was prepared and the roots were divided into four groups according to the following factors: adhesive system/resin cement (Ambar/ AllCem Core [FGM] and RelyX U200 [3M]) and application mode (manual or sonic). The posts were cemented and the roots were cut into discs and submitted to push-out bond strength (POBS) test. The failure mode was evaluated using a stereoscope at 25x magnification. The data were analyzed statistically using ANOVA and Tukey’s post-hoc test (α = 0.05). Results: The sonically activated RelyX U200 group was superior to the other groups. RelyX U200 manually applicated showed similar results to those of sonically activated Âmbar/AllCem. These three groups outperformed the Âmbar/AllCem manually applicated group. Adhesive failure between dentin and resin cement was the most predominant pattern. Conclusion: Sonic application of self-etching adhesive and self-adhesive cement improved the POBS of fiber posts to the root canal.

Micromorphology of Porosity Related to Electrical Resistance of Dental Luting Cements

2018 ◽  
Vol 766 ◽  
pp. 13-18
Author(s):  
Mana Sriyudthsak ◽  
Yaninee Kosaiyakanon ◽  
Fan Pui Luen ◽  
Kamolporn Wattanasirmkit ◽  
Viritpon Srimaneepong
Keyword(s):  
Electrical Property ◽  
Phosphate Glass ◽  
Electrical Resistance ◽  
Zinc Phosphate ◽  
High Porosity ◽  
Micro Ct ◽  
Glass Ionomer ◽  
Luting Cements ◽  
Luting Cement ◽  
Zinc Phosphate Glass

The aim was to investigate the relation between micromorphology of porosity and electrical resistance of dental luting cements. Five dental luting cements were evaluated: zinc phosphate, glass ionomer, and three types of resin luting cements. Porosity of the specimen was analyzed by micro-CT and electrical resistance of cement was measured at voltage of 125 V up to 30 days and solubility of each specimen was calculated. It showed that the resin luting cements provided the highest electrical resistance regardless of amount of porosity. Zinc phosphate and glass ionomer had high porosity and the lowest resistance (14 and 3 kΩ, respectively). It was found that the electrical resistance of luting cement was not directly affected by the amount of porosity, but it seems to be related to pore connection. There is no correlation between electrical resistance and percentage of porosity but the morphology of porosity may have an influence on the electrical property of luting cement. Models of pore connection were proposed to explain the electrical resistance of luting cement.

scholarly journals In Vitro Evaluation of the Effect of Different Luting Cements and Tooth Preparation Angle on the Microleakage of Zirconia Crowns

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Behnaz Ebadian ◽  
Amirhossein Fathi ◽  
Melika Savoj
Keyword(s):  
Resin Cement ◽  
Cement Type ◽  
Digital Photograph ◽  
Luting Cements ◽  
Luting Cement ◽  
Cad Cam ◽  
Zirconia Crowns ◽  
Tooth Preparation ◽  
Cementing Agent

Introduction. Discrepancy between the crown border and prepared tooth margin leads to a microleakage that eases the penetration of microorganisms and causes the dissolution of luting cement consequently. Several factors should be considered to achieve optimal fitness, including tooth preparation taper and type of cementing agent. The study aimed to determine the relation of tooth preparation taper and cement type on the microleakage of zirconia crowns. Materials and Methods. Fifty-six freshly extracted premolars without caries and restorations were selected as the study sample and divided into two groups of different tapering degrees (6 and 12 degrees). Zirconia copings were designed and fabricated by the CAD/CAM system. The samples were divided into four subgroups for cementation, and each subgroup was cemented with a different luting cement (n = 7). After 5000 thermocycles at 5°C–55°C and dye penetration, the specimens were sectioned in the mid-buccolingual direction, and a digital photograph of each section was taken under a stereomicroscope. Data were analyzed by the Kruskal–Wallis and Mann–Whitney tests (α = 0.05). Results. The results showed significant differences among the four types of luting cement in marginal permeability (PV < 0.001). Regardless of the type of cement, the 12-degree tapering resulted in a lower microleakage (46.4% without microleakage) with statistically significant differences from the 6-degree tapering (PV = 0.042). Conclusion. Within the limitations of this study, increasing the tapering degree of the prepared tooth for CAD/CAM zirconia copings improved the marginal fit and decreased the microleakage score. In addition, total-etch resin cement indicated the least microleakage.

Bond Strength of Composite Resin Luting Cements to Fiber-reinforced Composite Root Canal Post

2007 ◽  
Vol 8 (6) ◽  
pp. 17-24 ◽  
Author(s):  
Lippo Lassila ◽  
Anna-Maria Le Bell-Rönnlöf ◽  
Milla Lahdenperä ◽  
Pekka Vallittu
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Composite Resin ◽  
Interpenetrating Polymer Network ◽  
Fiber Reinforced ◽  
Luting Cements ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Luting Cement ◽  
Bond Strengths

Abstract Aims The aim of this study was to compare the attachment of different composite resin luting cements to a fiber-reinforced composite (FRC) post with a semi-interpenetrating polymer network polymer matrix. Methods and Materials Six different brands of composite resin luting cement stubs were applied on the surface of FRC post material and light-cured for 40 seconds. Shear bond strengths of luting cement stubs were measured using a universal testing machine. Results The differences in shear bond strengths between the cements were not statistically significant. Conclusion All of the tested composite resin luting cements provided acceptable attachment to the tested FRC post. The tested FRC post material is suitable to use with different composite resin luting cements. Citation Le Bell-Rönnlöf AM, Lahdenperä M, Lassila L, Vallittu P. Bond Strength of Composite Resin Luting Cements to Fiber-reinforced Composite Root Canal Post. J Contemp Dent Pract 2007 September; (8)6:017-024.

A Bond Strength Study of Luted Castable Ceramic Restorations

1989 ◽  
Vol 68 (5) ◽  
pp. 823-825 ◽  
Author(s):  
P.M. McInnes-Ledoux ◽  
W.R. Ledoux ◽  
R. Weinberg
Keyword(s):  
Bond Strength ◽  
Resin Cement ◽  
Acid Etching ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Luting Cements ◽  
Luting Cement ◽  
Bond Strengths ◽  
The Mean ◽  
Ceramic Restorations

Accurate intra coronal castings can be produced using a castable ceramic-DICOR®-for which there is a need to identify a suitable luting cement. The aim of this investigation was to evaluate the bond strength of three glass-ionomer luting cements and one resin cement to treated and untreated DICOR®, enamel, and dentin surfaces. Forty "cerammed" DICOR® specimens were assigned to four groups: (1-3) grit-blasting and bonding to each of the three glass-ionomer cements; and (4) acid-etching, silane coating, and bonding to the resin cement. Seventy enamel specimens were assigned to seven groups: (1-3) no etching and bonding to each of the glass-ionomer cements; (4-7) acid-etching and bonding to the glass-ionomer cements and the resin cement. Seventy dentin specimens were assigned to seven groups: (1-4) bonding to each of the three glass-ionomer cements and the resin cement; (5-7) polyacrylic acid preconditioning and bonding to each of the three glass-ionomer cements. The mean resin cement bond strengths (MN/m 2) to DICOR® (9.4) and to etched enamel (10.7) were significantly greater (p<0.01) than those of the glass-ionomer cements (DI-COR®, 0.8-1.2 ; enamel, 0.4-0.9). Preconditioning of enamel and dentin significantly increased (p<0.05) the bond strengths to the glass-ionomer cements. The mean bond strength of the resin cement to untreated dentin (4.3) was significantly higher (p<0.05) than the glass-ionomer bond strengths to untreated dentin (1. 0-1.7) and to preconditioned dentin (2.1-3.3). The high bond strengths achieved with the resin cement are encouraging. Selected surface treatment of DICOR®, enamel, and dentin prior to luting should be clinically useful.

scholarly journals Light Transmission of Various Aesthetic Posts at Different Depths and Its Effect on Push-Out Bond Strength, Microhardness of Luting Cement

Medicina ◽  
2022 ◽  
Vol 58 (1) ◽  
pp. 75
Author(s):  
Satheesh B. Haralur ◽  
Turki Abdullah Alasmari ◽  
Mohammed Hussin Alasmari ◽  
Hafiz Mohammed Hakami
Keyword(s):  
Bond Strength ◽  
Light Transmission ◽  
Testing Machine ◽  
Resin Cement ◽  
Light Transmittance ◽  
Zirconia Ceramic ◽  
Luting Cements ◽  
Luting Cement ◽  
Different Depths ◽  
Push Out

Background and Objectives: One requirement for the cemented post is the light transmittance on its entire length up to the deepest portion of a root canal to ensure the complete polymerization of resin cement. This study aimed to determine the light transmission ability in different aesthetic posts at different depths and its effect on the push-out bond strength and microhardness of luting cement at the corresponding interface. Materials and Methods: Twenty endodontic posts from glass fiber posts (GFP), zirconia ceramic posts (ZCP), and highly translucent zirconium oxide posts (HTZP) were sequentially sectioned into 12.8 and 4 mm lengths after recording the light intensity using a dental radiometer. Sixty single rooted premolar teeth root canals were treated and implanted vertically in a resin block. The post space was prepared and cemented with GFP, ZCP, and HTZP posts with twenty samples each. The root portion of teeth samples were sectioned into cervical, middle, and apical portion. A universal testing machine was utilized for the push-out bond strength test for the first ten samples from each group. The remaining ten samples from each group were used for the microhardness test using a micro-indenter instrument. The data were statistically analyzed using one-way Analysis of variance and Tukey HSD tests at p < 0.05. Results: The GFP endodontic postpresented with significant highest light translucency compared to HTZP, which was significantly higher than ZCP. GFP posts showed significantly higher bond strength per unit area compared to ZCP at analogous cross sections. The hardness of luting cement was also significantly higher amongst all tested endodontic posts. Conclusions: GFP high light translucency enhanced the curing of the luting resin cement that resulted in harder cement and a stronger bond supported by hardness and push-out tests. These findings suggest that GFP is preferred to be used with light-cured luting cements for restoration of endodontically treated teeth.

scholarly journals Resin push-out bonding strength to root canal dentin: effect of the irrigation solution application prior to post cementation

2017 ◽  
Vol 20 (2) ◽  
pp. 85 ◽  
Author(s):  
Silvia Michida ◽  
Amanda Maria de Oliveira Dal Piva ◽  
João Paulo Mendes Tribst ◽  
Rodrigo Othávio Assunção Souza ◽  
Geraldo Lombardo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Adhesive System ◽  
Resin Cement ◽  
Fiber Post ◽  
Root Canals ◽  
Irrigation Solution ◽  
Root Canal Dentin ◽  
Push Out ◽  
Resin Bonding

<p><strong>Objective</strong>: To evaluate the effect of different irrigation solutions prior to post cementation on the resin bonding to bovine root dentine. <strong>Material</strong> <strong>and</strong> <strong>Methods</strong>: 60 bovine roots (16 mm) were prepared to 12 mm with specific drill of a double-tapered fiber post system, included in PMMA, and divided into 6 groups, considering the irrigation solutions (IS) prior to cementation: Gr1- saline solution (control), Gr2- NaOCl 0.5 %, Gr3- NaOCl 1 %, Gr4- NaOCl 2.5 %, Gr5- NaOCl 5 %, Gr6- Chlorexidine 2 % (solution). The root canals were irrigated with IS 20 ml during 10 min. Then they were rinsed with 20 ml of distilled water and dried with paper points. One fiber post was molded with polyvinylsiloxane and 60 posts made of resin cement (PRC) were obtained moments before the cementation. The root canal dentin was etched with H<sub>2</sub>PO<sub>3</sub> 37 %/15 s + washing/drying, a multi-bottle etch&amp;rinse adhesive system was applied and the PRC were resin luted with dual resin cement (DuolinkTM, Bisco). Each specimen was cut into 4 slices of ±1.8mm in thickness and submitted to push-out test (1 mm/min). <strong>Results</strong>: ANOVA showed that bond strength was significantly affected by IS (P&lt;0.0001). The highest bond strengths (MPa) were those for the groups 4 (3.51 ± 1.52) and 5 (3.0 ± 1.16). The groups 1 (0.70 ± 0.30), 2 (0.80 ± 0.24), 3 (1.26 ± 0.57) and 6 (0.90 ± 0.41) were statistically similar to each other. <strong>Conclusion</strong>: The resin bonding to the root dentine was higher when higher concentrations of hypochlorite solutions were used.</p><p><strong>Keywords</strong></p><p>Bond strength; Irrigation solutions; Push-out test; Resin cement; Root canal dentin.</p>

scholarly journals Oval Versus Circular-Shaped Root Canals: Bond Strength Reached with Varying Post Techniques

2018 ◽  
Vol 29 (4) ◽  
pp. 335-341 ◽  
Author(s):  
Mariana Benedetti Ferreira Webber ◽  
Paula Bernardon ◽  
Fabiana M.G. França ◽  
Flávia L.B. Amaral ◽  
Roberta T. Basting ◽  
...  
Keyword(s):  
Bond Strength ◽  
Cross Section ◽  
Root Canal ◽  
Repeated Measures ◽  
Adhesive System ◽  
Resin Cement ◽  
Root Canals ◽  
Etch And Rinse ◽  
Significant Difference ◽  
Glass Fiber Posts

Abstract The aim of this study was to compare the bond strength (BS) of glass fiber posts (GFP) luted to oval and circular-shaped root canals rehabilitated using varying post techniques, at different intraradicular levels. Ninety 16-mm-long roots of human mandibular premolars, classified either as having oval or circular-shaped canals, were endodontically treated and prepared for restoration using one of three different post techniques (n=15): 1) single GFP; 2) resin-relined GFP; 3) main GFP associated with accessory posts. GFPs were luted with a dual polymerizing resin cement (RelyX ARC) after the canal had been treated with a 3-step etch-and-rinse adhesive system (Adper Scothbond Multipurpose). The samples were sectioned into three 1-mm-thick sections, which were differentiated by the root level (cervical, middle and apical) and tested for push-out BS. Assessment of failure mode was made under a stereomicroscope. Data were analyzed using repeated measures three-way ANOVA and Tukey’s test. The root canal cross-section had a significant influence on BS (p<0.001), with the lowest values being observed in oval-shaped canals. The post technique also significantly affected the BS (p=0.018), with the resin-relined GFPs providing the highest BS values in both oval and circular-shaped canals. Irrespective of the cross-section of the root canal and post technique, there was no significant difference in BS in the cervical, middle and apical third of the root canal (p=0.084). In oval-shaped canals, the BS to intraradicular dentin at cervical, middle or apical level could be increased when the GFPs posts were relined.

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