Journal articles: 'Post-Bond'

1

Latta, Thomas J. "Assessing Bond Market Developments Post-Euro." CFA Digest 29, no. 3 (August 1999): 18–20. http://dx.doi.org/10.2469/dig.v29.n3.508.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Oh, Jungsub, Jihun Jung, and Sungju Park. "IEEE 1500 Wrapper Design Technique for Pre/Post Bond Testing of TSV based 3D IC." Journal of the Institute of Electronics and Information Engineers 50, no. 1 (January 25, 2013): 131–36. http://dx.doi.org/10.5573/ieek.2013.50.1.131.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Valandro, Luiz Felipe, César Dalmolin Bergoli, Carolina Ceolin Druck, and Gabriel Kalil Rocha Pereira. "Effect of two Resin Cements and two Fiber Post Surface Treatments on Push-out Bond Strength between Fiber Post and Root Dentin." Journal of Contemporary Dental Practice 16, no. 1 (January 2015): 7–12. http://dx.doi.org/10.5005/jp-journals-10024-1627.

Full text

Abstract:

ABSTRACT Aim To evaluate the effect of fiber post surface treatments on push-out bond strength between fiber post and root dentin. Materials and methods Sixty bovine mandibular teeth (N = 60) were sectioned (16 mm), prepared (12 mm), embedded with acrylic resin and then allocated into six groups (n = 10): Gr1- Silane coupling agent (Sil) + Conventional resin cement AllCem (AlC); Gr2- Sil + Conventional resin cement RelyX ARC (ARC); Gr3- tribochemical silica coating (TBS) + AlC; Gr4– TBS + ARC; Gr5- No treatment (NT) + AlC; Gr6– NT+ ARC. Specimens were sectioned in four slices (2 mm) and submitted to push-out test. Fracture analyses were executed at x200. The values of the push-out bond strength were submitted to two-way ANOVA and Tukey test (á = 0.05). Results Resin cement did not affect the bond strength values (p = 0.9674), fiber post surface treatment affected the push-out bond strength (p = 0.0353), interaction between factors did not affected the values (p = 0.338). Tukey test did not show differences between the groups. Adhesive failure between cement and dentin was predominantly. Conclusion The fiber post surface treatment appears have no influence on bond strength between fiber post and root dentin. Clinical significance The tested fiber posts surface treatment appears do not influence the fiber post bond behavior. How to cite this article Druck CC, Bergoli CD, Pereira GKR, Valandro LF. Effect of two Resin Cements and two Fiber Post Surface Treatments on Push-out Bond Strength between Fiber Post and Root Dentin. J Contemp Dent Pract 2015;16(1):7-12.

APA, Harvard, Vancouver, ISO, and other styles

4

Das, Arunita, Josipa Bošnjak, and Akanshu Sharma. "Numerical investigations on post-fire bond behaviour of reinforcement in concrete." RILEM Technical Letters 4 (May 16, 2019): 1–8. http://dx.doi.org/10.21809/rilemtechlett.2019.88.

Full text

Abstract:

Reinforced concrete (RC) structures may be subjected to accidental fire loads during their service life. In such a case, it is essential to have appropriate methods for the estimation of post-fire performance. One of the vital aspects for the performance of RC structures is adequate steel-to-concrete bond. The bond behaviour under ambient conditions is very well established. However, an appropriate model for the assessment of the post-fire bond capacity is still lacking. In order to provide more insight into the bond performance after fire, a 3D FE numerical study using a thermo-mechanical model with temperature dependent microplane model for concrete is performed. The effects of concrete cover, confinement through stirrups, fire duration and exposure type on post-fire bond performance are investigated using beam-end specimen. The results show a strong degradation of post-fire bond capacity, which is primarily attributed to the irreversible damage of concrete cover resulting from heating and cooling.

APA, Harvard, Vancouver, ISO, and other styles

5

Gagné, Olivier Charles, and Frank Christopher Hawthorne. "Bond-length distributions for ions bonded to oxygen: metalloids and post-transition metals." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 74, no. 1 (January 12, 2018): 63–78. http://dx.doi.org/10.1107/s2052520617017437.

Full text

Abstract:

Bond-length distributions have been examined for 33 configurations of the metalloid ions and 56 configurations of the post-transition metal ions bonded to oxygen, for 5279 coordination polyhedra and 21 761 bond distances for the metalloid ions, and 1821 coordination polyhedra and 10 723 bond distances for the post-transition metal ions. For the metalloid and post-transition elements with lone-pair electrons, the more common oxidation state between n versus n+2 is n for Sn, Te, Tl, Pb and Bi and n+2 for As and Sb. There is no correlation between bond-valence sum and coordination number for cations with stereoactive lone-pair electrons when including secondary bonds, and both intermediate states of lone-pair stereoactivity and inert lone pairs may occur for any coordination number > [4]. Variations in mean bond length are ∼0.06–0.09 Å for strongly bonded oxyanions of metalloid and post-transition metal ions, and ∼0.1–0.3 Å for ions showing lone-pair stereoactivity. Bond-length distortion is confirmed to be a leading cause of variation in mean bond lengths for ions with stereoactive lone-pair electrons. For strongly bonded cations (i.e. oxyanions), the causes of mean bond-length variation are unclear; the most plausible cause of mean bond-length variation for these ions is the effect of structure type, i.e. stress resulting from the inability of a structure to adopt its characteristic a priori bond lengths.

APA, Harvard, Vancouver, ISO, and other styles

6

Schmage, P., P. Pfeiffer, E. Pinto, U. Platzer, and I. Nergiz. "Influence of Oversized Dowel Space Preparation on the Bond Strengths of FRC Posts." Operative Dentistry 34, no. 1 (January 1, 2009): 93–101. http://dx.doi.org/10.2341/08-53.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

SHIMA, Hiroshi, Lie-Liung CHOU, and Hajime OKAMURA. "Bond characteristics in post-yield range of deformed bars." Doboku Gakkai Ronbunshu, no. 378 (1987): 213–20. http://dx.doi.org/10.2208/jscej.1987.378_213.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Ip, Nathan, Atsushi Nagata, Norifumi Kohama, Norio Wada, and Kimio Motoda. "Investigation of Post-Bond Distortion in Direct Wafer Bonding." ECS Transactions 98, no. 4 (September 23, 2020): 47–52. http://dx.doi.org/10.1149/09804.0047ecst.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Scotti, N., A. Forniglia, E. Bergantin, D. S. Paolino, D. Pasqualini, and E. Berutti. "Fibre post adaptation and bond strength in oval canals." International Endodontic Journal 47, no. 4 (August 6, 2013): 366–72. http://dx.doi.org/10.1111/iej.12156.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Ip, Nathan, Atsushi Nagata, Norifumi Kohama, Norio Wada, and Kimio Motoda. "Investigation of Post-Bond Distortion in Direct Wafer Bonding." ECS Meeting Abstracts MA2020-02, no. 22 (November 23, 2020): 1642. http://dx.doi.org/10.1149/ma2020-02221642mtgabs.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Yudhit, Astrid, and Rusfian Dayuni Ariski S. "Pengaruh bahan bonding self-etch terhadap kekuatan perlekatan antara pasak glass fiber dengan resin komposit." Jurnal Material Kedokteran Gigi 1, no. 1 (March 1, 2012): 1. http://dx.doi.org/10.32793/jmkg.v1i1.153.

Full text

Abstract:

Nowadays, glass fiber post and composite resin cores have been used in endodontic treatment for esthetics achievement. The success of this treatment was affected by some factors such as bond strength between post and cores. The aim of this study is to investigate the effect of self etch bonding agent that use as adhesive materials between glass fiber post and resin composite by its bond strength. Totally twenty samples is used in this study, and divided in two groups (n=10 for each group), bonding group agents and without bonding agent group (control). The tensile-shear bond strength tested with Universal Testing Machine. Then, the bond strength values were analyzed statistically with t-test (p≤ 0,05). The result shows that bonds strength values in bonding agent groups were higher than without bonding agent groups. But, there is no significantly different between groups. In conclusion, bonding agent did not have effect on tensile-shear bond strength between glass fiber post and resin composite.

APA, Harvard, Vancouver, ISO, and other styles

12

Marcos, Regina Maria Helen-Cot, Gustavo Ross Kinder, Edson Alfredo, Tarcisio Quaranta, Gisele Maria Correr, Leonardo Fernandes da Cunha, and Carla Castiglia Gonzaga. "Influence of the Resin Cement Thickness on the Push-Out Bond Strength of Glass Fiber Posts." Brazilian Dental Journal 27, no. 5 (October 2016): 592–98. http://dx.doi.org/10.1590/0103-6440201600886.

Full text

Abstract:

Abstract The objective of the present study was to evaluate the influence of resin cement thickness on the bond strength of prefabricated and customized glass fiber posts after storage in distilled water. Thirty human uniradicular roots were treated endodontically. The roots were divided into 3 groups: THIN (thin cement layer) - post space preparation with #0.5 drill and cementation of #0.5 post; THICK (thick cement layer) - post space preparation with #1 drill and cementation of #0.5 post; and CUSTOM (customized cement layer) - post space preparation with #1 drill and cementation of a customized post (#0.5 glass fiber posts customized with resin composite). All posts were luted with self-adhesive resin cement. The push-out test was carried out after storage for 24 h and 90 days in distilled water at 37 °C. The data were analyzed with three-way ANOVA and Tukey's test (a=0.05). Bond strengths were significantly higher for CUSTOM (9.37 MPa), than for THIN (7.85 MPa) and THICK (7.07 MPa), which were statistically similar. Considering the thirds, the bond strength varied in the sequence: apical (7.13 MPa) < middle (8.22 MPa) = coronal (8.94 MPa). Bond strength for 24 h storage was significantly higher (8.80 MPa) than for 90-day storage (7.40 MPa). It may be concluded that the thickness of resin cement influenced the bond strength of glass fiber posts. The customized posts presented higher bond strength. Storage in water for 90 days affected negatively the values of bond strength, especially for thick cement layers in the apical third.

APA, Harvard, Vancouver, ISO, and other styles

13

Alnaqbi, Ibtisam O. M., Haitham Elbishari, and Emad S. Elsubeihi. "Effect of Fiber Post-Resin Matrix Composition on Bond Strength of Post-Cement Interface." International Journal of Dentistry 2018 (December 2, 2018): 1–11. http://dx.doi.org/10.1155/2018/4751627.

Full text

Abstract:

Objective. To evaluate the influence of 3 different post-resin matrix systems cemented with dual-cure resin cement in simulated root canals made of PMMA acrylic sheet. Methods. 3 types of fiber posts (n = 60) with different resin matrixes divided into 3 groups: group 1 cross-linked FRC Postec Plus post (n = 20), group 2 cross-linked Rely X post (n = 20), and group 3 Interpenetrated IPN Everstick post (n = 20). All posts were cemented using Multilink Automix dual-cure cement. Posts were cemented into acrylic blocks in order to purely test the strength of cement-post interface. After one week storage at 37°C, two sections of 1 mm thickness from middle-third were subjected to micro-push-out test at crosshead speed 0.5 mm/min. Results. The data were analyzed using one-way analysis of variance (ANOVA). The variable fiber post-matrix system was found to significantly affect the push-out bond strength (p<0.001). Group 2 exhibited that the highest mean push-out bond strength was (5.36 + 2.3 MPa), and group 3 showed the lowest mean push-out (0.41 + 0.4 MPa). There was significant difference among the groups regarding the failure mode as chi-square test revealed (p<0.001). Conclusion. Prefabricated cross-linked posts with epoxy-based matrix demonstrated higher bond strength than prefabricated cross-linked posts with Bis-GMA-based matrix and posts with semi-IPN matrix when luted with dimethacrylate-based dual-cured resin cement.

APA, Harvard, Vancouver, ISO, and other styles

14

AKMAN, Melek, Ayçe Unverdi ELDENIZ, Selen INCE, and Mehmet Burak GUNESER. "Push-out bond strength of a new post system after various post space treatments." Dental Materials Journal 35, no. 6 (2016): 876–80. http://dx.doi.org/10.4012/dmj.2015-372.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Aleisa, Khalil, Syed Rashid Habib, Abdul Sadekh Ansari, Ragad Altayyar, Shahad Alharbi, Sultan Ali S. Alanazi, and Khalid Tawfik Alduaiji. "Effect of Luting Cement Film Thickness on the Pull-Out Bond Strength of Endodontic Post Systems." Polymers 13, no. 18 (September 13, 2021): 3082. http://dx.doi.org/10.3390/polym13183082.

Full text

Abstract:

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.

APA, Harvard, Vancouver, ISO, and other styles

16

ZhiJie, Wang, Tony Lim, Jiang YingWei, Zhang ChangLiang, Haengsun Choi, and Kwansun Hwang. "2 mils Au wire interchip wedge bond cratering study." International Symposium on Microelectronics 2010, no. 1 (January 1, 2010): 000479–85. http://dx.doi.org/10.4071/isom-2010-wa4-paper4.

Full text

Abstract:

Au wire thermosonic wedge bonding is applied for die to die interconnect on accelerometer device. With the fragile bond pad structure of MEMS device, bond pad cratering or bond pad metal peel is a fatal wedge bond defect during assembly packaging and reliability failure during field application. Typical interchip wedge bond failure mode and the cause of failures are studied through analyzing wedge bonding mechanism, packaging & tooling design and bond pad metallization. Comprehensive wedge bond process characterization was carried out to improve wedge bond quality and reliability. Critical wedge bond responses (wedge pull, wedge shear, Cratering) were studied during wedge bond process characterization. Post wedge bond cratering has good correlation with the wedge tool in both position and shape. Si nodule underneath the bond pad metal generates higher local stress to the bond pad during wedge bonding. Thinner bond pad metal could not act as a cushion to mitigate the wedge bond stress to the poly silicon layer beneath the bond pad. The initial post wedge bond cratering / bond pad damage will get deteriorated during following assembly reflow process as well as SMT process, eventually the weakest interface layer beneath the bond pad will be separated, reflected as the bond pad metal peel. Approaches to enhance interchip wedge bond integrity were explored and significant improvements were seen.

APA, Harvard, Vancouver, ISO, and other styles

17

Vítek, Jan L., and David Čítek. "Effect of Reduced Bond of Prestressed Strands." Solid State Phenomena 249 (April 2016): 296–300. http://dx.doi.org/10.4028/www.scientific.net/ssp.249.296.

Full text

Abstract:

Bond of prestressing strands may be reduced by using protective coatings against corrosion during winter period, when early grouting of ducts may be impossible. It was not verified if the reduced bond has an influence on the performance of the post-tensioned structures. The experimental program was prepared, which investigated the bond of prestressing strands without protection and with two types of protective coatings. The program had two parts, laboratory pull-out tests and bending tests of large post-tensioned beams. The paper presents the results of this experimental program.

APA, Harvard, Vancouver, ISO, and other styles

18

Kim, Hyoung-Sik, Song-Yi Yang, Eun Ha Choi, Kwang-Mahn Kim, and Jae-Sung Kwon. "Adhesion between Epoxy Resin-Based Fiber Post and Dental Core Resin Improved by Non-Thermal Atmospheric Pressure Plasma." Applied Sciences 10, no. 7 (April 7, 2020): 2535. http://dx.doi.org/10.3390/app10072535.

Full text

Abstract:

The purpose of the study was to evaluate the adhesion between dental core resin and epoxy resin-based fiber post after treatment with non-thermal atmospheric pressure plasma (NTAPP) and compare with conventional methods of epoxy resin-based fiber post treatments. Contact angle was measured on the surface of epoxy resin before and after NTAPP treatment and X-ray photoelectron spectroscopy was used to analyze the surface chemistry. Finally, two shear bond strength tests were carried out; shear bond strength between core resin and epoxy resin for comparison between NTAPP treated and untreated sample, and push-out shear bond strength between core resin and NTAPP treated commercially available epoxy resin-based fiber post for comparison between NTAPP treated samples with conventionally treated samples. Contact angle on the surface of epoxy resin generally decreased with increasing NTAPP treatment time with presence of surface chemical changes. Also, there was significantly higher shear bond strength and push-out shear bond strength between epoxy resin and core resin for NTAPP treated epoxy resin, even to the conventionally treated epoxy resin-based fiber post with hydrofluoric acid or silane. In conclusion, new technology of NTAPP has potential for application on the epoxy resin-based fiber post to improve endodontic restoration success rate.

APA, Harvard, Vancouver, ISO, and other styles

19

Borzovič, Viktor, Ján Laco, Miroslav Pecník, and Peter Pažma. "The Crack Development Mechanism of Prestressed Girder Influenced by Different Bond between Prestressed Tendons and Concrete." Key Engineering Materials 691 (May 2016): 309–20. http://dx.doi.org/10.4028/www.scientific.net/kem.691.309.

Full text

Abstract:

The paper deals with formation and development of cracks up to the failure of two span post-tensioned concrete girder. It is focused on influence of different bond between prestressing units and surrounding grout. Monitored and analysed phenomena affected by different bond are as follows: crack initiation, crack spacing and crack width of the prestressed girder. Sources of analysis are results from experimental program focused on influence of oil based corrosion protection agents on bond of prestressing units. Two span post-tensioned girders were subjected to the loading in laboratory till the bending failure has occurred. Girders were in two cases prestressed with bonded tendons. Other two girders were post-tensioned with unbonded tendons and two girders with tendons with decreased bond, due to corrosion protection coatings. Girders have demonstrated different behaviour by loading regarding to the bond level of prestressing units. Experimental results are faced with the results of the theoretical calculation of crack width according to European standards.

APA, Harvard, Vancouver, ISO, and other styles

20

Muciaccia, Giovanni, Andrea Consiglio, and Gianpaolo Rosati. "Behavior and Design of Post-Installed Rebar Connections under Temperature." Key Engineering Materials 711 (September 2016): 783–90. http://dx.doi.org/10.4028/www.scientific.net/kem.711.783.

Full text

Abstract:

Typical applications for post-installed rebar connections consist in overlapping joints with existing reinforcement or anchoring of the reinforcement at a slab or beam support. At cold state it may be shown by testing that a post-installed rebar system can develop the same bond resistance with the same safety margin as cast-in-place rebar. Consequently, anchorage length and lap length for post-installed rebars can be calculated as for cast-in-place according to the Eurocode 2 provisions. However, when subjected to temperature, the decay in bond properties for post-installed systems is significantly more dramatic than for cast-in-place rebars. The paper presents the result of an experimental campaign carried out on a post-installed connection using a vinylester polymer, investigating the effects on the bond strength both of the temperature and of different testing conditions. Finally, design criteria are provided and applied to a typical case study consisting in a post-installed solid slab.

APA, Harvard, Vancouver, ISO, and other styles

21

Kacprzak-Ogłuszka, Marzena, and Beata Dejak. "Bond strength of glass fibre-reinforced posts with composite cement." Prosthodontics 68, no. 2 (May 15, 2018): 232–42. http://dx.doi.org/10.5604/01.3001.0012.0492.

Full text

Abstract:

Introduction. The most common failure in using glass fibre-reinforced composite posts is cementation of the post, i.e. the lack of junction between cement dentine or post. Aim of the study. To compare the bond strength between different glass fibre-reinforced composite (FRC) posts and selected composite cement. Materials and Methods. The following seven types of fiber reinforced composite posts (n =10): Fiber Post (GC Europe N.V., Leuven, Belgium), Glassix (Harald Nordin SA, Chailly s/ Montreux, Switzerland), Rebilda®Post (VOCO GmbH, Cuxhaven, Germany), FibreKleer Serrated Post (Pentron Clinical, Wallingford, USA), ParaPost®Fiber Lux (Coltene/Whaledent Inc., Cuyahoga Falls, USA), RelyX (3M Espe Dental Products, St.Paul, USA) oraz X-Post (Dentsply Maillefer Instruments, Ballaigues, Switzerland) were evaluated. Posts were cemented into metal sleeves with dual-cure resin cement CoreXFlow (Dentsply). The bond strength test based on the coaxial method was performed on the samples using Instron 4485 machine (Instron Corporation, Norwood, USA). Results. The significantly higher values of bond strength were demonstrated for Fiber Post (GC Europe N.V., Leuven, Belgium) with 29.57±1.44 MPa, and the lowest were shown by Glassix (Harald Nordin SA, Chailly s/Montreux, Switzerland) with 17.21±0.87 MPa. The differences were significant (p<0.001). Conclusions. 1. The significantly higher values of bond strength were demonstrated for Fiber Post (GC Europe N.V., Leuven, Belgium) and the lowest were shown by Glassix (Harald Nordin SA, Chailly s/Montreux, Switzerland). 2. The resin methacrylic posts had a stronger junction with cement than with epoxy resin posts.

APA, Harvard, Vancouver, ISO, and other styles

22

Seballos, Vivian Gehm, Mirela Sangoi Barreto, Ricardo Abreu da Rosa, Eduardo Machado, Luiz Felipe Valandro, and Osvaldo Bazzan Kaizer. "Effect of Post-Space Irrigation with NaOCl And CaOCl at Different Concentrations on the Bond Strength of Posts Cemented with a Self-Adhesive Resin Cement." Brazilian Dental Journal 29, no. 5 (September 2018): 446–51. http://dx.doi.org/10.1590/0103-6440201801955.

Full text

Abstract:

Abstract The aim of this study was to evaluate the effect of post-space irrigation with NaOCl and CaOCl at different concentrations on the bond strength of posts cemented with a self-adhesive resin cement. Eighty premolars were sectioned 14 mm from the apex, and endodontically treated. The root canal filling was partially removed. Specimens were randomly assigned into 8 groups (n=10), according to the irrigant for post-space irrigation: SS - 0.9% saline solution (control group); CHX - 2% chlorhexidine; 1% NaOCl - 1% sodium hypochlorite; 2.5% NaOCl - 2.5% sodium hypochlorite; 5% NaOCl - 5% sodium hypochlorite; 1% CaOCl - 1% calcium hypochlorite; 2.5% CaOCl - 2.5% calcium hypochlorite; and 5% CaOCl - 5% calcium hypochlorite. For each group, irrigation was performed continuously with 2 ml of solution. The post-spaces were dried with paper points (#80), and glass fiber posts were cemented using a self-adhesive resin cement. The specimens were sectioned perpendicularly and the push-out test was performed. Optical microscopy was used to analyze the failure mode. ANOVA and Bonferroni tests analyzed the bond strength data. NaOCl and CaOCl presented similar bond strength regardless the concentration used to irrigate the post-space (p>0.05). SS showed the highest bond strength (11.47 MPa) (p<0.05). Adhesive failures at the cement/dentin interface were predominant (58.33%). Saline solution should be irrigant of choice to irrigate the post-space before fiber post cementation with self-adhesive resin cement. NaOCl and CaOCl negatively affect the bond strength values.

APA, Harvard, Vancouver, ISO, and other styles

23

Silva, Natércia Rezende da, Monise de Paula Rodrigues, Aline Aredes Bicalho, Raissa Albuquerque de Deus, Priscilla Barbosa Ferreira Soares, and Carlos José Soares. "Effect of Magnification during Post Space Preparation on Root Cleanness and Fiber Post Bond Strength." Brazilian Dental Journal 30, no. 5 (October 2019): 491–97. http://dx.doi.org/10.1590/0103-6440201902662.

Full text

Abstract:

Abstract The aim of this study was to evaluate the effect of magnification during post space preparation on root cleanness and on fiber post bond strength. Methods: Thirty human central upper incisors with similar root canal in size and shape were selected, decoronated to 15 mm and endodontically filled. The teeth were assigned into 3 groups (n=10), according to the method of magnification during post space preparation inspection: Control, using naked eye; loupe, using a dental surgical 3x magnifying glass; surgical microscope, using a 6x surgical microscope. The roots were scanned by using micro-CT before and after post space preparation for residue remnants evaluation. Fiber posts were cemented using self-adhesive resin cement (Rely X U200, 3M-ESPE). Two 1-mm-thick slices from the cervical, medium and apical thirds were submitted to a push-out test (PBS). Failures modes were classified. PBS data were analyzed by using two-way ANOVA with repeated measurement and the Tukey test. The significance level was set at 5%. The method of visualization had no effect on PBS (p=0.556). The cervical region had higher values than apical region irrespective of the inspection method (p=0.012). Adhesive failure between the resin cement and dentin was the prevalent failure mode for all groups. Micro-CT analysis showed no difference on root cleanness into the root canal after post space preparation. The use of magnification devices as loupe and microscope while performing post space do not improve the PBS and did not affect sealer remain of decoronated anterior teeth.

APA, Harvard, Vancouver, ISO, and other styles

24

Türker, Sevinç Aktemur, Bahar Özçelik, and Zeliha Yilmaz. "Evaluation of the Bond Strength and Fracture Resistance of Different Post Systems." Journal of Contemporary Dental Practice 16, no. 10 (2015): 788–93. http://dx.doi.org/10.5005/jp-journals-10024-1758.

Full text

Abstract:

ABSTRACT Aim To compare the bond strength and the fracture resistance of different post systems. Materials and methods Endodontically treated 60 mandibular incisor and 60 mandibular premolar teeth were used for the bond strength and fracture resistance test respectively. For each test, three groups (n = 20) were formed according to the posts used zirconia posts (ZR post), individually formed glass fiber reinforced composite posts with an (Interpenetrating Polymer Network—IPN post) and cast metal posts. Then groups were randomly assigned into two subgroups according to the post design: 1-parallel sided and 2-tapered (n = 10/group). All posts were luted with a self-adhesive luting agent. For push-out test two 1 mm thick horizontal root sections were obtained and subjected to push-out test. For fracture resistance test, the specimens were loaded vertically at 1 mm/min crosshead speed. The push out test data were analyzed with Kruskal-Wallis and Dunn's test. Analysis of variance (ANOVA) and Tukey significant difference tests were used to compare the fracture resistance. Results Cast metal posts showed the highest retention (p < 0.05); however, IPN and zirconia posts showed similar results. No significant difference was found between parallel sided or tapered designs of post groups in terms of bond strength (p > 0.05). In terms of fracture resistance, IPN post groups showed lowest fracture resistance (p < 0.05). No significant difference was found between parallel sided or tapered posts in terms of fracture resistance, except zirconia post (p > 0.05). There was no relationship between the bond strength and fracture resistance of the post systems (r = – 0.015, p > 0.700). Conclusion Post type had effect both on the fracture resistance and retention of the posts used. However, post design had effect only on the fracture resistance of the post systems. Clinical significance Superficial treatment of the post used can improve the retention of post systems. How to cite this article Türker SA, Özçelik B, Yilmaz Z. Evaluation of the Bond Strength and Fracture Resistance of Different Post Systems. J Contemp Dent Pract 2015;16(10): 788-793.

APA, Harvard, Vancouver, ISO, and other styles

25

Borges, Marcela G., André L. Faria-e-Silva, Paulo C. F. Santos-Filho, Fernanda P. Silva, Luís R. M. Martins, and Murilo de Sousa Menezes. "Does the Moment of Fiber Post Cutting Influence on the Retention to Root Dentin?" Brazilian Dental Journal 26, no. 2 (April 2015): 141–45. http://dx.doi.org/10.1590/0103-6440201300242.

Full text

Abstract:

Despite several advantages associated with pre-fabricated glass-fiber posts, the coronal portion of these posts must be cut to allow their use in various clinical situations. However, cutting the cemented post can generate stress on the bonding interface and affect the bond strength. The aim of this study was to investigate the effect the of fiber post cutting on the bond strength of root canals. Sixty bovine incisor roots were included in resin cylinders with simulated periodontal ligaments. Glass-fiber posts were luted using regular resin cement RelyX ARC (3M ESPE) or self-adhesive cement RelyX Unicem (3M ESPE). The posts were cut prior to cementation, immediately after luting or after building up the core (n=10). After storage for 24 h, the samples were cut and subject to push-out testing using a mechanical testing machine (EMIC DL 2000). Data were analyzed using two-way ANOVA (resin cement x moment of post cutting) and Tukey's post hoc test (α=0.05). The moment of fiber post cutting did not affect the bond strength when Unicem was used. However, the bond strength was reduced when ARC was used and when the post was cut immediately. In conclusion, the moment of fiber post cutting may affect the retention of root canal posts when a regular resin cement is used.

APA, Harvard, Vancouver, ISO, and other styles

26

Garner, Stanton B. "Post-Brechtian Anatomies: Weiss, Bond, and the Politics of Embodiment." Theatre Journal 42, no. 2 (May 1990): 145. http://dx.doi.org/10.2307/3207752.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Haddad, R. H., and Z. G. Al-Kofahi. "Post-heating bond behaviour between lightweight fibrous concrete and steel." Structural Concrete 9, no. 4 (December 2008): 189–97. http://dx.doi.org/10.1680/stco.2008.9.4.189.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Cook, Kristina M., and Philip J. Hogg. "Post-Translational Control of Protein Function by Disulfide Bond Cleavage." Antioxidants & Redox Signaling 18, no. 15 (May 20, 2013): 1987–2015. http://dx.doi.org/10.1089/ars.2012.4807.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Small, David W., and Martin Head-Gordon. "Post-modern valence bond theory for strongly correlated electron spins." Physical Chemistry Chemical Physics 13, no. 43 (2011): 19285. http://dx.doi.org/10.1039/c1cp21832h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Mills, Connor, and Benjamin Z. Dymond. "Tensile Bond Strength of Post-Installed Epoxy-Coated Reinforcing Bars." Journal of Bridge Engineering 26, no. 2 (February 2021): 06020002. http://dx.doi.org/10.1061/(asce)be.1943-5592.0001667.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Vukovic, Darko, Kseniya A. Lapshina, and Moinak Maiti. "European Monetary Union bond market dynamics: Pre & post crisis." Research in International Business and Finance 50 (December 2019): 369–80. http://dx.doi.org/10.1016/j.ribaf.2019.04.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Teixeira, Erica Cappelletto Nogueira, Cecilia Pedroso Turssi, Anderson Takeo Hara, and Mônica Campos Serra. "Influence of post-bleaching time intervals on dentin bond strength." Brazilian Oral Research 18, no. 1 (March 2004): 75–79. http://dx.doi.org/10.1590/s1806-83242004000100014.

Full text

Abstract:

It has been reported that bond strength of resin to tooth structure can be reduced when the bonding procedure is carried out immediately after the bleaching treatment. This study evaluated the effect of bleaching of non-vital teeth bleaching on the shear bond strength (SBS) of composite resin/bovine dentin interface and the influence of delaying the bonding procedures for different time intervals following internal bleaching. According to a randomized block design, composite resin cylinders (Z100/Single bond - 3M) were bonded to the flattened dentin surface of two hundred and fifty-six teeth which had previously been subjected to four different treatments: SPH - sodium perborate + 30% hydrogen peroxide; SPW - sodium perborate + distilled water; CP - 37% carbamide peroxide; and CON - distilled water (control), each one followed by storage in artificial saliva for 0 (baseline), 7, 14, and 21 days after bleaching (n = 16). The bleaching agents in the pulp chambers were replaced every 7 days, over 4 weeks. The SBS test of the blocks was done using a universal testing machine. The ANOVA showed that there was no significant interaction between time and bleaching agents, and that the factor time was not statistically significant (p > 0.05). For the factor bleaching treatment, the Student's t-test showed that [CON = CP] > [SPW = SPH]. The bleaching of non-vital teeth affected the resin/dentin SBS values when sodium perborate mixed with 30% hydrogen peroxide or water was used, independently of the elapsed time following the bleaching treatment.

APA, Harvard, Vancouver, ISO, and other styles

33

Holliday, Christopher. "London, the Post-7/7 Bond Films, and Mourning Work." Journal of Popular Film and Television 46, no. 1 (January 2, 2018): 56–63. http://dx.doi.org/10.1080/01956051.2018.1423210.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Stokes, A. N., W. M. Tay, and B. P. Pereira. "Shear bond of resin cement to post-cured hybrid composites." Dental Materials 9, no. 6 (November 1993): 370–74. http://dx.doi.org/10.1016/0109-5641(93)90059-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Noia, Brandon, Krishnendu Chakrabarty, and Erik Jan Marinissen. "Optimization Methods for Post-Bond Testing of 3D Stacked ICs." Journal of Electronic Testing 28, no. 1 (July 16, 2011): 103–20. http://dx.doi.org/10.1007/s10836-011-5233-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Hu, Peng, and Jiong-Feng Liang. "Bond Behavior of CRACFST Columns after Exposure to Elevated Temperatures." Advances in Civil Engineering 2019 (July 1, 2019): 1–8. http://dx.doi.org/10.1155/2019/4873451.

Full text

Abstract:

The bond behavior of post-heated circular recycled aggregate concrete-filled steel tube (CRACFST) columns is experimentally investigated in this paper. A total of 24 heated push-out CRACFST specimens are prepared; at the same time, 3 unheated specimens are also prepared and tested for comparison. This paper investigates the effects of five variable parameters, namely, temperature, exposure period, recycled coarse aggregate (RCA) replacement ratio, concrete strength, and interface length-to-diameter ratio, on the bond stress-slip curves and bond strength. The results show that the push-out CRACFST specimens exhibit some differences in bond stress-slip curves at both ambient and high temperature. The bond strength increases with increasing temperature. Other parameters also have influence to some extent. On the basis of a regression analysis of the experimental data, a revised bond strength model is proposed to predict the post-heated bond behavior between recycled aggregate concrete and circular steel tube.

APA, Harvard, Vancouver, ISO, and other styles

37

Suzuki, Thaís Yumi Umeda, Mariana Almeida Pereira, João Eduardo Gomes-Filho, Linda Wang, Wirley Gonçalves Assunção, and Paulo Henrique dos Santos. "Do Irrigation Solutions Influence the Bond Interface Between Glass Fiber Posts and Dentin?" Brazilian Dental Journal 30, no. 2 (March 2019): 106–16. http://dx.doi.org/10.1590/0103-6440201901963.

Full text

Abstract:

Abstract The aim of this study was to evaluate the push-out bond strength and interface permeability of glass-fiber posts in different regions of post space (cervical, middle, and apical) submitted to different irrigation solutions. Ninety single-rooted human teeth were submitted to endodontic treatment and divided into five groups, according to irrigation solutions: distilled water, 5.25% NaOCl, 25% polyacrylic acid, 2% chlorhexidine, and 23 ppm Ag NP dispersion. Each group was divided in 3 subgroups (n=6) according to cementation: SBU: Adper Scotchbond Universal + RelyX ARC; U200: RelyX U200; MCE: MaxCem Elite. Bond strength and sealing ability were measured in different areas of post space. The data was subjected to ANOVA and Fisher’s test (a=0,05). The silver nanoparticle solution showed highest bond strength values and lowest interface permeability in all thirds analyzed for SBU group. In the U200 group, the highest bond strength values were found for sodium hypochlorite solution, with significant difference between this solution and polyacrylic acid. A decrease in bond strength values in cervical to apical direction was found for MCE group and the same behavior were found for others groups. Regarding interface permeability, use of silver nanoparticle solution resulted in lower values in cervical and apical thirds. There was a decrease in bond strength in cervical to apical direction. Different irrigation solutions and intraradicular depth influenced the bond strength and interface permeability of adhesive material to dentin substrate. Silver nanoparticle solution can effectively be used as an irrigation agent in post space prior to fiber post cementation process.

APA, Harvard, Vancouver, ISO, and other styles

38

Aleisa, Khalil. "Bond Strength of Overdenture Locator Posts Cemented with Seven Luting Agents." Journal of Contemporary Dental Practice 14, no. 4 (2013): 675–80. http://dx.doi.org/10.5005/jp-journals-10024-1384.

Full text

Abstract:

ABSTRACT Statement of the problem Post retention is crucial factor in restoration survival. Posts are commonly failed due to loss of retention. It is unknown which luting agents would provide the maximum bond strength for Locator overdenture posts. Aim The aim of this study was to evaluate the bond retentive strengths of Locator overdenture posts cemented with 7 luting agents. Materials and methods One hundred and five single rooted human teeth were decoronated and randomly assigned to 7 groups (n = 15). Post spaces were prepared with Locator post drills to the depth of 6 mm. The Locator posts were cemented with Variolink II, RelyX ARC, Multilink N, RelyX Unicem, ParaCore, or MultiCore Flow resin luting agents. Zinc phosphate cement was served as control group. Specimens were stored in water at 37°C for 24 hours. Each specimen was loaded in tension in an Instron universal testing machine. The maximum force required to dislodge each Locator post was recorded. Means and standard deviations were calculated and data were statistically analyzed with one-way analysis of variance (ANOVA). Results The highest mean bond strength value for Locator posts was recorded for MultiCore® Flow group (mean = 550.1 N), while the lowest mean value was for RelyX Unicem™ resin cement group (mean = 216.8 N). A statistically significant difference in mean locator overdenture post bond strength was observed between the 7 cement types (p < 0.0001). ParaCore™ and MultiCore® Flow groups had significantly higher bond strength than all other groups, but they were not differed from each other. Conclusion Bond strength of Locator overdenture posts were influenced by the type of luting agents. MultiCore Flow and ParaCore resin cements offered the greatest retention. Clinical significance The type of luting agents had a significant effect on the retention of Locator posts. The use of Core buildup resin cements as luting agent with Locator post demonstrated the greatest retention. How to cite this article Aleisa K. Bond Strength of Overdenture Locator Posts Cemented with Seven Luting Agents. J Contemp Dent Pract 2013;14(4):675-680.

APA, Harvard, Vancouver, ISO, and other styles

39

Koçak, Mustafa Murat, Seda Cengiz, and Sibel Koçak. "Bond Strength of Resin Composites used as Core Materials around Different Types of Fiber Posts." International Journal of Experimental Dental Science 1, no. 2 (2012): 81–83. http://dx.doi.org/10.5005/jp-journals-10029-1020.

Full text

Abstract:

ABSTRACT The purpose of this study was to evaluate the shear bond strength of two resin composites around different types of fiber posts. Twenty post specimens were prepared for three types of fiber posts. Posts were embedded in acrylic resin blocks with half of the post diameter exposed. The exposed portions of the posts were successively ground with silicon carbide paper until flattened flush with the acrylic resin, to create a standard smooth surface. All the posts were treated with a single silane coupling agent layer. After silane application, the posts were gently air dried. Three types of fiber posts were randomly divided into two groups, according to the resin composite used. The light-cured composite resins were placed in a polytetrafluoroethylene mold positioned over the post specimens and they were polymerized. Shear bond strength values (MPa) of posts and composite resin cores were measured using an universal test machine. Twoway analysis of variance (ANOVA) and Tukey's test were used for statistical analysis. The result of two-way ANOVA showed that the difference between the post groups was not significant (p = 0.59). But significant differences were observed between the core materials (p = 0.018). The shear bond strength values were not affected by the type of the fiber post. The type of the composite core material affected the bond strength values between the fiber post and composite core. How to cite this article Koçak MM, Cengiz S, Koçak S. Bond Strength of Resin Composites used as Core Materials around Different Types of Fiber Posts. Int J Experiment Dent Sci 2012; 1(2):81-83.

APA, Harvard, Vancouver, ISO, and other styles

40

Bitter, K., A. Maletic, K. Neumann, L. Breschi, G. Sterzenbach, and M. Taschner. "Adhesive Durability Inside the Root Canal Using Self-adhesive Resin Cements for Luting Fiber Posts." Operative Dentistry 42, no. 6 (November 1, 2017): E167—E176. http://dx.doi.org/10.2341/17-017-l.

Full text

Abstract:

SUMMARY Objectives: The aim of the study was to investigate the effects of various self-adhesive resin cements on the push-out bond strengths and nanoleakage expression at the luting interfaces of fiber posts immediately and after one year of aging. Methods and Materials: One hundred forty-four extracted human anterior teeth were endodontically treated. After post space preparation, fiber posts were luted using five commercially available self-adhesive resin (SAR) cements and a core build-up material applied with a self-etch adhesive (BF: Bifix SE/Rebilda Post, VOCO; CSA: Clearfil SA Cement/Rely X Fiber Post, 3M ESPE; RX: RelyX Unicem 2/Rely X Fiber Post, 3M ESPE; SPC: Speed Cem/FRC Postec, Ivoclar Vivadent; SMC: Smart Cem/X Post, Dentsply; RB: Rebilda DC-Futurabond/Rebilda Post; n=22). For each group, half of the specimens were subjected to thermocycling (TC) (5°C-55°C, 10,000 cycles) and stored humid for one year at 37°C. Push-out bond strength data of six slices (thickness 1 mm) per root and nanoleakage expression of representative specimens were evaluated after 24 hours (baseline) and after TC and storage for one year (aging), respectively. Results: Bond strength differed significantly among resin cements (p<0.0005) and the location inside the root canal (p<0.0005), but not by aging (p=0.390; repeated-measures analysis of variance). SMC (14.6±5.8 MPa) and RX (14.1±6.8 MPa) revealed significantly higher bond strength compared to BF (10.6±5.4 MPa) and RB (10.0±4.6 MPa) but differed not significantly from SPC (12.8±4.8) MPa; CSA (6.1±4.6 MPa) revealed significantly lower bond strength compared to all other investigated materials (p<0.05; Tukey Honestly Significantly Different). Qualitative nanoleakage analysis revealed more silver deposits at the interface in all groups after aging. For CSA, a large amount of silver deposits inside the cement was also observed at baseline and after aging. Conclusions: Fiber post luting using SAR cements demonstrated reliable bond strengths. Product-specific differences and initial degradation effects could be demonstrated.

APA, Harvard, Vancouver, ISO, and other styles

41

Novais, Veridiana Resende, Paulo Cézar Simamotos Júnior, Regina Maria Puppin Rontani, Lourenço Correr-Sobrinho, and Carlos José Soares. "Bond strength between fiber posts and composite resin core: influence of temperature on silane coupling agents." Brazilian Dental Journal 23, no. 1 (2012): 08–14. http://dx.doi.org/10.1590/s0103-64402012000100002.

Full text

Abstract:

This study evaluated the effect of air drying temperature and different silane coupling agents on the bond strength between glass fiber posts and composite resin core. The post surface was cleaned with alcohol and treated with different silane coupling agents, being three prehydrolyzed silanes [Silano (Angelus), Prosil (FGM), RelyX Ceramic Primer (3M ESPE)] and one two-component silane [Silane Coupling Agent (Dentsply)]. Two post-silanization air drying temperatures, 23ºC and 60ºC, were applied. A cylindrical plastic matrix was placed around the silanized post and filled with composite resin. Each bonded post provided 7 slices for push-out testing. Each slice was loaded to failure under compression at a cross-head speed of 0.5 mm/min. Data were analyzed by two-way ANOVA and Scott-Knott tests (α=0.05). Dunnett's test was used to compare the mean of the control group with that of each experimental group. Scanning electron microscopy (SEM) was used to evaluate the interface of the fractured slices. For the 23ºC air drying temperature, the use of RelyX Ceramic Primer resulted in significantly lower bond strength than the other silane coupling agents, while the bond strength with Silane Coupling Agent was the highest of all groups. Only with Silane Coupling Agent, the bond strength for the 23ºC air drying temperature was significantly higher than that for 60ºC air drying. In conclusion, the use of warm air drying after silane application produced no increase in the bond strength between the fiber-reinforced composite post and the composite core. The two-component silane produced higher bond strength than all prehydrolyzed silanes when it was used with air drying at room temperature.

APA, Harvard, Vancouver, ISO, and other styles

42

ANDRIOLI, Adriana Rosado Valente, Margareth COUTINHO, Andréa Araújo de VASCONCELLOS, and Milton Edson MIRANDA. "Relining effects on the push-out shear bond strength of glass fiber posts." Revista de Odontologia da UNESP 45, no. 4 (August 18, 2016): 227–33. http://dx.doi.org/10.1590/1807-2577.14815.

Full text

Abstract:

Abstract Introduction The correct use of glass fiber posts in endodontically treated teeth is essential for the clinical success of restorative treatment. Objective This study evaluated the push-out shear bond strength of relined (R) or non-relined (NR) glass fiber posts, cemented with self-adhesive resin cement [RelyXTM U100 (U100)] and conventional resin cement [RelyXTM ARC (ARC)]. Material and method Sixty human single-rooted teeth were endodontically treated and divided into ARC-NR; U100-NR; ARC-R; U100-R groups. The teeth were sectioned into cervical, middle and apical thirds, and subjected to the push-out test. Bond strength was analyzed by the Friedman test; cement and post types were compared by the Mann Whitney test. The pattern of failures was evaluated with digital camera through images at 200x magnification, and was classified as adhesive (at the cement/dentin or cement/post interface), cohesive (cement or post), and mixed failures. Result In ARC-NR, bond strength values were higher in the cervical third; in U100-NR and ARC-R they were similar between the thirds. In U100-R, in the cervical and middle thirds the bond strength values were similar, and there was lower value in the apical third. For non-relined glass fiber posts, the highest mean bond strength values were observed with self-adhesive resin cement. Whereas, relined posts cemented with conventional resin cement had stronger cement layer in comparison with non-relined fiber posts. Conclusion The post relining technique was efficient in ARC-R. ARC-NR and U100-R showed improved bond strength in the cervical region of canal walls. The main failures were adhesive at the cement-post interface.

APA, Harvard, Vancouver, ISO, and other styles

43

Lassila, Lippo, Anna-Maria Le Bell-Rönnlöf, Milla Lahdenperä, and Pekka Vallittu. "Bond Strength of Composite Resin Luting Cements to Fiber-reinforced Composite Root Canal Post." Journal of Contemporary Dental Practice 8, no. 6 (2007): 17–24. http://dx.doi.org/10.5005/jcdp-8-6-17.

Full text

Abstract:

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.

APA, Harvard, Vancouver, ISO, and other styles

44

Mesquita, Gabriela Campos, Crisnicaw Verissimo, Luis Henrique Araujo Raposo, Paulo Cesar Freitas Santos-Filho, Aderito Soares da Mota, and Carlos Jose Soares. "Can the Cure Time of Endodontic Sealers Affect Bond Strength to Root Dentin?" Brazilian Dental Journal 24, no. 4 (July 2013): 340–43. http://dx.doi.org/10.1590/0103-6440201302246.

Full text

Abstract:

The cure time of endodontic sealers may influence the bond strength of fiber posts to root dentin. Forty teeth were selected and endodontically filled using calcium hydroxide cement and then divided into 2 groups according to the time elapsed between endodontic filling and post luting (n = 20): Immediately - glass fiber post luting immediately after endodontic filling; and Delayed - post luting performed 7 days after endodontic filling. The roots were also subdivided according to resin cement used for post luting (RelyX ARC and RelyX Unicem). The specimens were stored at 37°C for 24 h and sectioned in six 1-mm-thick slices from cervical, middle and apical thirds. The slice specimens were submitted to a push-out test at a crosshead speed of 0.5 mm/min, and the bond strength values obtained (MPa) were submitted to two-way ANOVA in a split-plot arrangement and Tukey's test (α=0.05). For both RelyX ARC and Unicem, the bond strength was significantly higher when the posts were cemented 7 days after the endodontic treatment. RelyX Unicem showed significantly higher bond strength values than RelyX ARC for both cementation periods. It was concluded that post luting should be made after the complete setting of the root canal sealer. Self-adhesive resin cement should be preferred for fiber post luting.

APA, Harvard, Vancouver, ISO, and other styles

45

Rosatto, Camila Maria Peres de, Marina Guimarães Roscoe, Veridiana Resende Novais, Murilo de Sousa Menezes, and Carlos José Soares. "Effect of Silane Type and Air-Drying Temperature on Bonding Fiber Post to Composite Core and Resin Cement." Brazilian Dental Journal 25, no. 3 (July 2014): 217–24. http://dx.doi.org/10.1590/0103-6440201300005.

Full text

Abstract:

This study evaluated the influence of silane type and temperature of silane application on push-out bond strength between fiberglass posts with composite resin core and resin cement. One hundred and sixty fiberglass posts (Exacto, Angelus) had the surface treated with hydrogen peroxide 24%. Posts were divided in 8 groups according to two study factors: air-drying temperature after silane application (room temperature and 60 ºC) and silane type: three pre-hydrolyzed - Silano (Angelus), Prosil (FGM), RelyX Ceramic Primer (3M ESPE) and one two-component silane - Silane Coupling Agent (Dentsply). The posts (n=10) for testing the bond strength between post and composite core were centered on a cylindrical plastic matrix and composite resin (Filtek Z250 XT, 3M ESPE) that was incrementally inserted and photoactivated. Eighty bovine incisor roots (n=10) were prepared for testing the bond strength between post and resin cement (RelyX U100, 3M ESPE) and received the fiberglass posts. Push-out test was used to measure the bond strength. Data were analyzed by two-way ANOVA followed by Tukey's test (a=0.05). ANOVA revealed that temperature and silane had no influence on bond strength between composite core and post. However, for bond strength between post and resin cement, the temperature increase resulted in a better performance for Silane Coupling Agent, Silano and RelyX Ceramic Primer. At room temperature Silane Coupling Agent showed the lowest bond strength. Effect of the warm air-drying is dependent on the silane composition. In conclusion, the use of silane is influenced by wettability of resinous materials and pre-hydrolyzed silanes are more stable compared with the two-bottle silane.

APA, Harvard, Vancouver, ISO, and other styles

46

Graiff, Lorenzo, Laura Rasera, Marco Calabrese, and Paolo Vigolo. "Bonding Effectiveness of Two Adhesive Luting Cements to Glass Fiber Posts: Pull-Out Evaluation of Three Different Post Surface Conditioning Methods." International Journal of Dentistry 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/148571.

Full text

Abstract:

The purpose of this study was to evaluate the bond strength at the post/resin-cement interface with 3 different surface treatments of glass fiber posts and with 2 different luting resin cements. Sixty glass fiber posts (RelyX Fiber Post) were randomly divided into 3 groups (n=20) and were luted with a dual-polymerizing self-adhesive universal resin cement (RelyX Unicem) and with a dual-polymerizing resin cement (RelyX ARC). This was carried out in association with a dual-polymerizing adhesive (Scotchbond Multi-Purpose Plus) in simulated plexiglass root canals after receiving three different pretreatment procedures. A pull-out test was performed on each sample to measure bond strengths. Data were analyzed with two-way ANOVA. Two samples from each group were processed for SEM observations in order to investigate the morphologic aspect of the post/cement interface. Both resin cements demonstrated significant different bond strength values (P<0.0001). The surface treatment result was also statistically significant (P=0.0465). SEM examination showed a modification of the post surface after pretreatment with methyl methacrylate. The dual-polymerizing self-adhesive universal resin cement achieved higher MPa bond strength values. The use of methyl methacrylate as a surface treatment of glass fiber posts provided a significant increase in bond strengths between the posts and both luting materials.

APA, Harvard, Vancouver, ISO, and other styles

47

Yu, Guo Xi, Song Zhang, and Zhang Fan. "Effect of Different Surface Treatments on Push-Out Bond Strength of Zirconia Oxide Posts." Advanced Materials Research 833 (November 2013): 177–80. http://dx.doi.org/10.4028/www.scientific.net/amr.833.177.

Full text

Abstract:

To Investigate the Effect of Different Surface Treatments on Push-out Bond Strength of Zirconia Oxide Posts in Root Canals. Sixty Single Rooted Extracted Teeth were Collected and Divided into Two Groups. Custom Milled Zirconium Oxide Posts (Cercon, Degudent, Germany; Cosmopost, Ivoclar, Liechtenstein) were Fabricated. Post Specimens of each Group were Subjected to Different Surface Treatments (n=10): no Treatment (control), Sandblasting then Silane Coating and Silane Application (SB+SC+SI), Sandblasting and Silane Application (SB+SI). all Specimens were Bonded with Relyx Unicem and Horizontally Sectioned into Three Sections and Subjected to a Push-out Test. Data were Analyzed Using Two-way ANOVA. Cercon Recorded Significant Higher Bond Strength than Cosmopost (P＞0.05). Surface Treatments Recorded Higher Values than Control Group, and SB+SC+SI Presented Higher Bond Strength than SB+SI (P＞0.05). there was no Significant Difference among Different Root Regions (P＞0.05). Therefore Cercon May be more Suitable to be Used as Post Materials than Cosmopost. Surface Treatments have Significant Effect on Push-out Bond Strength of Zirconia Oxide Post and SB+SC+SI Group Presents Better Bond Strength than SB+SI Group.

APA, Harvard, Vancouver, ISO, and other styles

48

Kaur, Navjot, Manjit Kumar, Amrit Khosla, Ritu Batra, and Sumit Katoch. "Effect of Various Surface Treatments on Push-out Strength of Glass Fiber Posts–An In Vitro Study." Dental Journal of Advance Studies 06, no. 01 (April 2018): 028–33. http://dx.doi.org/10.1055/s-0038-1673571.

Full text

Abstract:

Abstract Aim The aim of this study was to investigate push-out bond strength of glass fiber posts after various surface treatments and to investigate push-out bond strength at different levels of root (coronal, middle, apical). Materials and Methods Forty extracted teeth were selected for study (maxillary anteriors and mandibular premolars). Roots were sectioned 16 mm from apex, endodontically treated and divided into four groups of 10 each based on surface treatment of posts; Group I (Control Group): No treatment of the post, Group II: Post surface were sandblasted and then treatment with silane coupling agent, Group III: Hydrofluoric acid application on the post surface and then treatment with silane coupling agent, Group IV: Post surface treated with 37% phosphoric acid treatment for 1 minute. Posts after various surface treatments were luted. Roots were then cut into three sections coronal, middle, and apical. The push-out test was done to assess push-out bond strength. The data obtained were statistically analyzed. Results Hydrofluoric acid and silane coupling agent treatment had little effect on the bond strength of post. Sandblasting and silane coupling agent was proven to be more effective and improved push-out strength of glass fiber posts followed by phosphoric acid group. Conclusion It was concluded that sandblasting followed by silane coupling agent showed highest bond strength in all parts of the root compared with other surface treatments. Highest push-out strength was found at the coronal level of the root followed by middle and apical level.

APA, Harvard, Vancouver, ISO, and other styles

49

Mosharraf, Ramin, and Parisa Ranjbarian. "Effects of post surface conditioning before silanization on bond strength between fiber post and resin cement." Journal of Advanced Prosthodontics 5, no. 2 (2013): 126. http://dx.doi.org/10.4047/jap.2013.5.2.126.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Menezes, MS, AL Faria-e-Silva, FP Silva, GR Reis, CJ Soares, THS Stape, and LR Martins. "Etching a Fiber Post Surface with High-concentration Bleaching Agents." Operative Dentistry 39, no. 1 (January 1, 2014): E16—E21. http://dx.doi.org/10.2341/12-270-l.

Full text

Abstract:

Summary Introduction Commonly, resin composites/cements fail to achieve proper bonding to fiber posts when their surfaces have not been previously etched. This study evaluated the effect of the concentration and application mode of hydrogen peroxide on the surface topography and bond strength of resin composite to glass-fiber posts. Methods and Materials Fiber posts were immersed in 24% or 35% solutions (a high-concentration bleaching agent) of hydrogen peroxide (H2O2), or these solutions were applied over the post surface using a microbrush (n=10). Posts without any treatment were used as a control. After etching, the posts were silanated and an adhesive was applied. The posts were positioned in a mold, and a resin composite was incrementally inserted and light-cured. The post/resin assembly was serially sectioned into several beams that were subjected to a tensile bond strength test. The data were subjected to the two-way analysis of variance and Tukey test (α=0.05). The Dunnet's test was used to compare the experimental conditions to the control. The surface topography was analyzed using scanning electronic microscopy. Results The non-etched post presented a relatively smooth surface without fiber exposure. Except for the application of 24% H2O2, the other experimental conditions increased the number of exposed fibers and bond strength in relation to the control. Although immersion resulted in higher values for the 24% H2O2 application, the mode of application did not alter bond strength when 35% H2O2 was used. Conclusions The effect of the mode of application of H2O2 depended on its level of concentration. A high-concentration bleaching agent improved the bond strength of the resin composite to the post surface, regardless of which mode was used.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Post-Bond'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles