Effects of C-factor and resin volume on the bonding to root canal with and without fibre post insertion

Aksornmuang, Juthatip; Nakajima, Masatoshi; Senawongse, Pisol; Tagami, Junji

doi:10.1016/j.jdent.2011.03.007

Cited by 52 publications

(42 citation statements)

References 28 publications

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“…23 Additionally, high stress generated by shrinkage of the resin cement during fiber-post cementation due the high C-factor of the root canal hinders bonding of the cement to the post. 28 Stability of the bonding obtained with post etching, using a commercial high-concentration bleaching agent, must also be evaluated in future studies. It has been demonstrated that thermal cycling can alter the bond strength of resin-based material to fiber posts.…”

Section: Discussionmentioning

confidence: 99%

Etching a Fiber Post Surface with High-concentration Bleaching Agents

Menezes

Faria-e-Silva

et al. 2014

Operative Dentistry

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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.

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Section: Discussionmentioning

confidence: 99%

Etching a Fiber Post Surface with High-concentration Bleaching Agents

Menezes

Faria-e-Silva

et al. 2014

Operative Dentistry

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“…However, some studies have reported that the presence of fiber posts offers no improvement in fracture strengths of resin built-up teeth [14][15][16] . Furthermore, some studies have demonstrated that the insertion of fiber posts into root canals reduced adhesive performance owing to the increase in the C-factor 17,18) , because increases in C-factor causes higher contraction stresses at the adhesive interface. Fiber posts are widely used in the resin built-up method; however, the role of fiber posts is still controversial, especially when they are used with resin core materials with high elastic moduli.…”

Section: Introductionmentioning

confidence: 99%

The influence of elastic moduli of core materials on shear stress distributions at the adhesive interface in resin built-up teeth

et al. 2017

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This study aimed to investigate shear stress distributions in resin built-up teeth using resin composites of varying elastic moduli (E), with or without fiber posts. Three-dimensional mathematical models of a root-filled mandibular premolar tooth were constructed. Resin post and cores were built-up with resin composites of three different E: 12,000, 18,000 and 24,000 MPa, with or without fiber posts. Finite element linear analysis was performed to calculate shear stress distributions at bonding interface between resin core and dentin. Regardless of fiber post insertion, the shear stress on the cervical surface of resin core decreased as the E of resin composites increased. Insertion of fiber posts increased the shear stress on the post surface of resin core, with increases in the E of resin composites. In conclusion, using resin core materials with higher E decreased the shear stress at cervical interface between resin core and dentin regardless of fiber post insertion.

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“…Comparing the direct and indirect methods, the former reportedly demonstrated greater dentin bond strength, 9 whereas the latter has an advantage of contouring the cores in proper taper because of the laboratory work. In this case report, we propose a technique for resin composite post and core in which the core is fabricated indirectly for proper contour and the fiberpost is bonded directly to dowel hole for bond strength.…”

Section: 5005/jp-journals-10024-2223mentioning

confidence: 99%

Pre-endodontic Post and Core Technique for Endodontic and Prosthodontic Treatment

Sasaki

Yamamoto

Ikawa

et al. 2018

The Journal of Contemporary Dental Practice

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Introduction: Displacement of provisional fixed prostheses may result in undesirable and embarrassing outcomes in dental treatments, especially in endodontic treatment. Development of certain counter measures has been necessary to avoid such discomforts. Aim:The aim of this report was to propose a pre-endodontic post and core technique to achieve smooth progress of the treatment. Materials and methods:The patient was a 59-year-old male diagnosed with an infraocclusion caused by wear of his teeth. He received full mouth provisional fixed restorations for a complete oral rehabilitation. Displacement and fracture of the restorations frequently occurred during the observation period for the function of the restorations. Therefore, the pre-endodontic post and core technique was applied to the abutment teeth before their endodontic treatments were started. The technique consisted of three steps as follows:Step 1: Caries removal and dowel preparation were performed for the abutment teeth having apical periodontitis. Composite cores were indirectly fabricated, which had access holes for endodontic treatment.Step 2: The cores were bonded to the teeth. In endodontic treatment, rubber dam appliances were easily placed owing to the core, and proper tooth isolation was accomplished.Step 3: Fiberposts were bonded to the dowel holes through the access holes after the root canal filling. During endodontic treatment, displacement and/or fracture of the provisional restorations did not occur. Clinical significance: The pre-endodontic post and core technique is useful for avoiding the discomforts in dental treatments, namely, a smooth transition from endodontic to prosthodontic treatment can be achieved. Conclusion

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Effects of C-factor and resin volume on the bonding to root canal with and without fibre post insertion

Cited by 52 publications

References 28 publications

Etching a Fiber Post Surface with High-concentration Bleaching Agents

Etching a Fiber Post Surface with High-concentration Bleaching Agents

The influence of elastic moduli of core materials on shear stress distributions at the adhesive interface in resin built-up teeth

Pre-endodontic Post and Core Technique for Endodontic and Prosthodontic Treatment

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