Flexural properties of endodontic posts and human root dentin

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

doi:10.1016/j.dental.2006.06.047

Cited by 204 publications

(146 citation statements)

References 32 publications

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“…However, a post with a high elastic modulus could be more prone to cause unrestorable fractures. This is why the use of posts with lower elastic modulus such as glass fiber ones have been proposed by several authors [34][35][36]. The advantage of glass fiber posts is that they are able to improve the bending resistance and that failures, if they occur, are more easily restorable.…”

Section: Discussionmentioning

confidence: 99%

Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

et al. 2013

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Objectives This study aims to evaluate the fracture resistance of endodontically treated anterior teeth restored with crowns made of composite or ceramic and retained without the use of a post (endocrowns) or with posts of 5 mm (short) and 10 mm in length (long). Material and methods Forty-eight intact maxillary incisors were selected for the study. After endodontic treatment, the crowns were sectioned 2 mm coronally to the cementoenamel junction provided with a ferrule of 2 mm. The roots were randomly divided into six groups (n=8) according to the post length and type of coronary restoration. The crowns were fabricated with the chairside economical restoration of esthetic ceramics system. Group 1 was restored with a 10-mm glass fiber post, composite core, and a full-coverage ceramic crown (LPCer); group 2, with a 5-mm glass fiber post, composite core, and a full-coverage ceramic crown (SPCer); group 3, with a 10-mm glass fiber post, composite core, and a fullcoverage composite crown (LPCpr); group 4, with a 5-mm glass fiber post, composite core, and a full-coverage composite crown (SPCpr); and groups 5 (EndoCer) and 6 (EndoCpr) were restored with ceramic and composite endocrowns, respectively. The teeth were then thermomechanically loaded in a chewing machine. After fatigue, the specimens were loaded to fracture. Data were analyzed with ANOVA and chi-square test. Mode of failure was defined as repairable or non-repairable. Results Presence of post, post length, and crown material had no significant effect on the fracture resistance. Groups restored with endocrowns presented a higher number of repairable fractures in respect to the other groups. Conclusions Presence of a post had no effect on the restorations' fracture strength. Clinical relevance Although this in vitro study has some limitations in respect to its clinical relevance, the restoration of largely destroyed anterior teeth with the use of an endocrown or a short glass fiber post might have advantages over a large glass fiber post.

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Section: Discussionmentioning

confidence: 99%

Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

et al. 2013

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“…As a result of this loss of structure, a post is required to provide adequate retention for the core foundation and the final restoration 1,2) . Studies have suggested that the restoration materials used for ETT should have mechanical properties similar to that of dentin 3,4) . These materials should also be able to bond to tooth structure and be biocompatible in the oral environment to achieve a good clinical outcome 3,4) .…”

Section: Introductionmentioning

confidence: 99%

“…Studies have suggested that the restoration materials used for ETT should have mechanical properties similar to that of dentin 3,4) . These materials should also be able to bond to tooth structure and be biocompatible in the oral environment to achieve a good clinical outcome 3,4) . Traditionally, a cast post and core, with the cast post closely adapted to the post space, has been used to replace tooth structure lost during endodontic treatment 5) .…”

Section: Introductionmentioning

confidence: 99%

Fracture resistance of endodontically treated teeth using fiber post with an elastic modulus similar to dentin

et al. 2013

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This study investigated the effect of fiber reinforced composite resin (FRC) post lengths, ferrule, and full coverage metal crown on fracture resistance of endodontically treated teeth (ETT) using an experimental FRC post with the similar elastic modulus of dentin (11.5 GPa). ETT was restored according to 1 of 7 combinations of FRC post length (10, 5, 2.5, 0 mm), ferrule (0, 2 mm), and with/ without metal crown (n=6). An oblique compressive load was applied on the restored teeth using a universal testing machine. Fracture loads were evaluated with 1-way ANOVA and Tukey HSD test (p<0.05). Compared with tooth preparation only, the fracture loads of ETT restored with composite resin and different post lengths were not significantly different. The group with the ferrule with metal crown showed significantly greater fracture resistance than the others.

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“…The use of fiber posts luted with resin cements has been reported in several studies (1)(2)(3). Glass fiber posts have been widely used in restorative dentistry because of their elastic modulus similar to dentin and their capability to distribute stress more effectively than cast post-and-cores (4).…”

Section: Introductionmentioning

confidence: 99%

Can the Cure Time of Endodontic Sealers Affect Bond Strength to Root Dentin?

et al. 2013

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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.

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Flexural properties of endodontic posts and human root dentin

Cited by 204 publications

References 32 publications

Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

Fracture resistance of endodontically treated teeth using fiber post with an elastic modulus similar to dentin

Can the Cure Time of Endodontic Sealers Affect Bond Strength to Root Dentin?

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