The effect of custom adaptation and span-diameter ratio on the flexural properties of fiber-reinforced composite posts

Grande, Nicola M.; Plotino, Gianluca; Ioppolo, Pietro; Bedini, Rossella; Pameijer, Cornelis H.; Somma, Francesco

doi:10.1016/j.jdent.2009.01.007

Cited by 13 publications

(15 citation statements)

References 43 publications

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“…As the span length/post diameter ratio increased, all values of metal root canal posts increased except for flexural strength. These results differ from those of a previous study 21) , possibly because of differences in statistical analysis methods. In the current study, multiple regression models were analyzed using a stepwise regression method that was different from that of the previous study.…”

Section: Discussioncontrasting

confidence: 99%

“…This means that the effect of post diameter and span length were limited, and some other parameter affected the results. This value was previously inferred to be the span length/post diameter ratio 21,[25][26][27]31) . In the present study, the span length/post diameter ratio of root canal posts varied from 3.0 to 10.0, which is lower than the recommended value.…”

Section: Discussionmentioning

confidence: 88%

“…For FRC root canal posts, both flexural strength and modulus increased as span length increased or post diameter decreased. This result indicates a systematic error in determining the flexural strength and flexural modulus values 21) . An error was also confirmed by the x-and y-coefficients of the equation acquired from the 3-D plot of flexural strength and modulus for each FRC root canal post.…”

Section: Discussionmentioning

confidence: 97%

“…The fundamental material properties of flexural strength and flexural modulus cannot be accurately ascertained using short samples 26) . For high-strength engineering composites, a high length to diameter (L/D) ratio (40:1 or 60:1) should be used in order to eliminate the shear effect during the three-point bending test using ASTM D790-10 21,25) . ISO testing standard 10477 specifies three-point loading with the span length/post diameter ratio of 10 31) .…”

Section: Discussionmentioning

confidence: 99%

“…Higher values indicate higher stiffness, while lower values indicate greater flexibility. The flexural modulus is calculated by taking into account the elastic behavior of a sample within a load range that will not cause plastic deformation [19][20][21][22][23][24][25][26] . While there are published studies of root canal post materials, there are few studies concerning test conditions 21,27) .…”

Section: Introductionmentioning

confidence: 99%

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Effects of metal- and fiber-reinforced composite root canal posts on flexural properties

Kim

et al. 2016

Dent. Mater. J.

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The aim of this study was to observe the effects of different test conditions on the flexural properties of root canal post. Metaland fiber-reinforced composite root canal posts of various diameters were measured to determine flexural properties using a threepoint bending test at different conditions. In this study, the span length/post diameter ratio of root canal posts varied from 3.0 to 10.0. Multiple regression models for maximum load as a dependent variable were statistically significant. The models for flexural properties as dependent variables were statistically significant, but linear regression models could not be fitted to data sets. At a low span length/post diameter ratio, the flexural properties were distorted by occurrence of shear stress in short samples. It was impossible to obtain high span length/post diameter ratio with root canal posts. The addition of parameters or coefficients is necessary to appropriately represent the flexural properties of root canal posts.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of metal- and fiber-reinforced composite root canal posts on flexural properties

Kim

et al. 2016

Dent. Mater. J.

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Mechanical effect of static loading on endodontically treated teeth restored with fiber‐reinforced posts

et al. 2013

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The aim of this study was to investigate the mechanical behavior of a dental system built up with fiber‐reinforced composite (FRC) endodontic posts with different types of fibers and two cements (the first one used with a primer, the second one without it). Six FRC posts were used. Each system was characterized in terms of structural efficiency under external applied loads similar to masticatory forces. An oblique force was applied and stiffness and maximum load data were obtained. The same test was used for the dentine. The systems were analyzed by scanning electron microscope (SEM) to investigate the surface of the post and inner surface of root canal after failure. The mechanical tests showed that load values in dental systems depend on the post material and used cement. The highest load (281 ± 59 N) was observed for the conical glass fiber posts in the cement without primer. There was a 50 and 85% increase in the maximum load for two of the conical posts with glass fibers and a 229% increase for the carbon fiber posts in the cement without primer as compared with the cement with primer. Moreover, almost all the studied systems showed fracture resistances higher than the typical masticatory loads. The microscopic analysis underlined the good adhesion of the second cement at the interfaces between dentine and post. The mechanical tests confirmed that the strength of the dental systems subjected to masticatory loads was strictly related to the bond at the interface post/cement and cement/dentine. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 102B: 384–394, 2014.

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Strategies for the Restoration of Minimally Invasive Endodontically Treated Teeth

Plotino¹,

Turchi

2020

Minimally Invasive Approaches in Endodontic Practice

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The effect of custom adaptation and span-diameter ratio on the flexural properties of fiber-reinforced composite posts

Cited by 13 publications

References 43 publications

Effects of metal- and fiber-reinforced composite root canal posts on flexural properties

Effects of metal- and fiber-reinforced composite root canal posts on flexural properties

Mechanical effect of static loading on endodontically treated teeth restored with fiber‐reinforced posts

Strategies for the Restoration of Minimally Invasive Endodontically Treated Teeth

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