Bond strength values of fiberglass post to flared root canals reinforced with different materials

Bakaus, Thaís Emanuelle; Gruber, Yançanã Luizy; Reis, Alessandra; Gómes, Osnara María Mongruel; Gomes, Giovana Mongruel

doi:10.1590/1807-3107bor-2018.vol32.0013

Cited by 26 publications

(42 citation statements)

References 32 publications

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“…21 On the other hand, the decreased bond strength in the apical region of the roots in the CAD/CAM groups may be explained by a lower polymerization in depth and the high C-factor due to the unfavorable cavity configuration of the post space. 25 This is in accordance with several in vitro studies 8,11,12 that evaluated the effect of post relining on push out bond strength and also concluded to a decreased bond strength values in the apical region of the root canal due to a lower polymerization of the composite. 12 However, since the cement used in the present study was dual-cure, this reason can be set aside.…”

Section: Discussionsupporting

confidence: 88%

“…25 This is in accordance with several in vitro studies 8,11,12 that evaluated the effect of post relining on push out bond strength and also concluded to a decreased bond strength values in the apical region of the root canal due to a lower polymerization of the composite. 12 However, since the cement used in the present study was dual-cure, this reason can be set aside. Possible explanations may reside in the fact that the surface contact of tapered posts to the root canal walls decreases with the diameter, less surface contact would translate in less force required for dislodgment.…”

Section: Discussionsupporting

confidence: 88%

“…11 However, Bakaus et al, 12 stated that closely fitting prefabricated post in the canal exhibited the highest bond strength results in comparison with relined posts, and both exhibited better bond strength than a prefabricated post poorly adapted in flared roots. 12 More recently, Borzangy et al, 13 compared CAD/CAM polymer-infiltrated post and core to prefabricated fiber posts with and without composite relining and described a greater resistance to fracture for the CAD/CAM posts in comparison to relined fiber posts. Alternatively, a one-piece customized post and core can provide good adaptation in the post space and eliminates the post/core interface, thus decreasing the chances of failure at this level.…”

mentioning

confidence: 99%

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Effect of Fabrication Technique and Thermal Cycling on the Bond Strength of CAD/CAM Milled Custom Fit Anatomical Post and Cores: An In Vitro Study

Eid

Koken

Baba

et al. 2019

Journal of Prosthodontics

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Purpose This study is to investigate the effect of milling custom fit anatomical post and cores from fiber reinforced composite and high‐density polymer blocks using CAD/CAM technology on the bond strength to root canal dentin compared with prefabricated fiber posts, and to evaluate the influence of thermal cycling on the push out bond strength of the tested materials. Materials and Methods Eighty extracted single‐rooted premolars, endodontically treated and prepared to receive the posts, were randomly divided into four groups (n = 20): BLC: Custom‐milled fiber‐reinforced composite posts and cores (Trilor, Bioloren), AMC: Custom‐milled high‐density polymer posts and cores (Ambarino, Creamed), BLP: Prefabricated fiber‐reinforced composite posts and composite core buildups (Bioloren; Filtek Bulk Fill Posterior, 3M). The posts used have the same matrix and fiber composition as BLC, RXP: Prefabricated posts and composite core buildups (RelyX fiber post, 3M; Filtek Bulk Fill Posterior); used as a control group. All of the posts were cemented using a self‐adhesive resin cement (RelyX U200, 3M). Half of the sample was randomly assigned to thermal cycling in distilled water for 6,000 cycles to simulate aging, while the other half was tested for bond strength without thermal cycling. A push‐out test was conducted using a universal testing machine until failure. Bond strength values were calculated in megapascals (MPa). The mode of failure was observed using a stereo microscope. Results were analyzed by two‐way ANOVA followed by a Bonferroni post hoc test for comparison. The level of significance was set at p < 0.05. Results Push‐out bond strength was significantly higher (p <0.001) in the CAD/CAM post groups than in the groups with prefabricated posts regardless of the post material, while aging of the teeth did not significantly affect the push‐out strength (p = 0.536). Failures were adhesive between cement and dentin for all groups except for AMC, where adhesive failure between the cement and the post was also observed. Conclusion The CAD/CAM manufacturing technique was proved to ameliorate the retention of the post and cores in the root canal. Thermal cycling did not affect the bond strength of the tested groups.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 88%

mentioning

confidence: 99%

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Effect of Fabrication Technique and Thermal Cycling on the Bond Strength of CAD/CAM Milled Custom Fit Anatomical Post and Cores: An In Vitro Study

Eid

Koken

Baba

et al. 2019

Journal of Prosthodontics

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“…However, other studies have suggested that welladapted posts may also decrease the bond strength (13)(14)(15)(16). Therefore, post adaptation and ideal cement layer thickness to increase the bond strength are not yet very well defined in the literature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Glass Fiber Post Adaptation on Push-Out Bond Strength to Root Dentin

et al. 2019

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The aim of this study was to evaluate the effect of different glass fiber posts (GFPs) diameters on the push-out bond strength to dentin. Forty unirradicular human teeth were endodontically treated and used for cementation of GFPs (White Post DC, FGM) with different diameters (n=10): P1 - ø 1.6 mm coronal x 0.85 mm apical; P2 - ø 1.8 mm coronal x 1.05 mm apical; P5 - ø 1.4 mm coronal x 0.65 mm apical; and PC - customized post number 0.5 with composite resin (Tetric Ceram A2, Ivoclair Vivadent). All GFPs were cemented into the root canal using a dual-curing luting composite (Variolink II, Ivoclar Vivadent). One slice (1.7 mm) of each root third of cemented GFP (cervical, middle, and apical) was submitted to push-out testing. Failure modes of all specimens were classified as: adhesive failure between resin cement and post; adhesive failure between dentin and resin cement; cohesive failure within resin cement, post or dentin; and mixed failure. The data were analyzed with two-way ANOVA and Tukey’s test (a=0.05). The highest bond strength values were presented for the P2 and PC groups. There was no statistically significant difference between the GFP thirds in each group. The groups P2, P5, and PC showed predominantly adhesive failure. For P1, the most prevalent type of failure was adhesive between resin cement and post. It may be concluded that a glass fiber post that is well adapted to the root canal presents higher bond strength values, regardless of GFP third.

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“…As razões para exclusão dos demais artigos foram: utilização da resina bulk-fill para confecção de núcleo de preenchimento; 12,13 aplicação do material como barreira intracanal; 14 utilização da resina para reforçar internamente canal muito amplo; 15 aplicação do material usando técnica incremental; 16 e avaliação de corpos de prova da resina exclusivamente, sem nenhuma aplicação direta em dentes. 17 Quadro 1 -Descrição dos estudos avaliando o emprego de resinas bulk-fill na restauração de dentes tratados endodonticamente Avaliou-se a adaptação dos materiais restauradores por tomografia óptica após seccionar os dentes longitudinalmente.…”

Section: Resultsunclassified

Restauração de dentes tratados endodonticamente com resinas bulk-fill: revisão integrativa

França¹,

Portella

Reston

et al. 2018

Rev. da Fac. de Odontologia, UPF

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Objetivo: O objetivo deste estudo é realizar uma revisão de literatura sobre o emprego das resinas bulk-fill empregadas para restauração de dentes tratados endodonticamente. Pretende-se compilar os principais resultados de trabalhos clínicos e laboratoriais que avaliem resinas bulk-fill para restauração direta de dentes tratados endodonticamente. Método: A busca dos estudos foi realizada no portal PubMed, utilizando os descritores “bulk fill” e “endodontically treated”. Os dados extraídos foram agrupados em uma tabela-síntese apresentando as características metodológicas e os principais resultados de cada estudo. Resultados: Sete estudos foram incluídos na revisão e, dentre eles, cinco avaliaram a resistência a fratura dos dentes após a restauração, um avaliou a adaptação da resina ao assoalho da câmara pulpar e um trata-se de um ensaio clínico com acompanhamento de três anos, comparando o uso de resina bulk-fill com resina convencional. Conclusão: O desempenho das resinas bulk-fill mostrou-se semelhante às resinas convencionais quando comparadas quanto a resistência a fratura dos dentes (in vitro), e a longevidade (in vivo). A economia de tempo clínico proporcionada pelas resinas bulk-fill pode justificar o seu emprego para a restauração de dentes tratados endonticamente.

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Bond strength values of fiberglass post to flared root canals reinforced with different materials

Cited by 26 publications

References 32 publications

Effect of Fabrication Technique and Thermal Cycling on the Bond Strength of CAD/CAM Milled Custom Fit Anatomical Post and Cores: An In Vitro Study

Effect of Fabrication Technique and Thermal Cycling on the Bond Strength of CAD/CAM Milled Custom Fit Anatomical Post and Cores: An In Vitro Study

Effect of Glass Fiber Post Adaptation on Push-Out Bond Strength to Root Dentin

Restauração de dentes tratados endodonticamente com resinas bulk-fill: revisão integrativa

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