Fracture resistance of thin‐walled roots restored with different post systems

Kıvanç, Bağdagül Helvacıoğlu; Alaçam, Tayfun; Ulusoy, Özgür İlke Atasoy; Genç, Özgür; Görgül, Gülız

doi:10.1111/j.1365-2591.2009.01609.x

Cited by 46 publications

(33 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fracture strength The fracture strength of zirconia posts was evaluated using natural teeth in 15 studies 12,14,33,39,[41][42][43]48,49,51,55,58,[60][61][62] ( Table 1) and artificial roots in three studies 29,53,59) , and according to core material (composite resin core versus ceramic core) in nine studies 35,40,[44][45][46][47]52,54,57) (Table 2). Table 1 shows that the fracture strengths of teeth with zirconia posts and composite cores ranged between 300 N and 700 N. However, when ceramic cores were used, these values ranged between 800 N and 1500 N. These results concurred with studies which evaluated the fracture strength of zirconia posts according to core material 35,40,44,45,54) .…”

Section: Resultsmentioning

confidence: 99%

Zirconia ceramic post systems: a literature review and a case report

2010

View full text Add to dashboard Cite

Cast metal post-core systems have a long history of successful use because of their superior physical properties. However, their high elastic modulus can cause stress concentrations within the surrounding radicular dentin, resulting in root fractures. Moreover, the increasing demand for more esthetically appealing and biocompatible restorations has led to the development of tooth-colored, translucent, metal-free post-core systems. Notably, prefabricated zirconia ceramic post systems have been introduced to satisfy this trend toward a heightened awareness of esthetics, whereby the translucency of all-ceramic crowns can be successfully maintained with the use of ceramic post-core materials. Owing to the keen interest in and widespread use of zirconia ceramic post systems, many in vitro studies on zirconia posts have been published in the last 15 years. The aim of this article was to present data about the retention, fracture resistance, microleakage, light transmission, esthetic advantages, and radiodensity of zirconia posts. Two clinical survival rate studies were also presented. Based on the results of these studies, zirconia posts have been shown to improve the esthetic quality of all ceramic crowns and thus their usage is recommended. Apart from literature review, a case report in which a fractured fiber post was replaced with a custom-made zirconia post was also presented.

show abstract

Section: Resultsmentioning

confidence: 99%

Zirconia ceramic post systems: a literature review and a case report

2010

View full text Add to dashboard Cite

show abstract

“…These findings are in agreement with previous studies[19–21] that suggested that a smaller post-diameter might be used to avoid excessive wear of the inner root dentin during the post-site preparation once the amount of the remaining dentin wall around the post is directly related to the fracture resistance of the tooth. [192122] However, some studies indicated that posts with increased diameters were more resistant to fracture and provided more resistance to the restored teeth,[10] and led to less stress distribution to the remaining dentin. [11] In spite of these considerations, our study indicates a more conservative root canal preparation, being a 1.10-mm size (1/3 of the root) able to perform proper resistance.…”

Section: Discussionmentioning

confidence: 99%

“…The high elastic modulus of Ni–Cr alloy compared with dentin, and its capability to concentrate stresses in critical areas of root, may be responsible for these catastrophic fractures. [1013–152425] Conversely, glass-fiber posts have a lower elastic modulus, similar to that of dentin, distributing stresses more uniformly along the dentin/post-interface. [212425] The bonding between the fiber post and dentin root creates a “monobloc,” which is another factor that might contribute to a better stress distribution on the tooth.…”

Section: Discussionmentioning

confidence: 99%

“…A study of Kivanç et al . [10] found that tooth restored with cast posts with an increased diameter (roots with 1.0 mm and 1.5 mm of remaining coronal structure) presented significant higher fracture resistance than posts with less diameter (root walls with 2.0 mm of remaining structure). Also, a finite element analysis demonstrated that when the diameter of the post was 50% of the root, the stress distributions of the post and dentin were most favorable.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of post-thickness and material on the fracture strength of teeth with reduced coronal structure

et al. 2013

View full text Add to dashboard Cite

Purpose:To evaluate the fracture strength of endodontically treated teeth with reduced coronal structure reinforced with glass-fiber posts and cast posts and core (nickel–chromium alloy) with different thickness.Materials and Methods:Forty maxillary central incisors were sectioned at 1 mm of the cementoenamel junction and endodontically treated. The teeth were divided into four groups (n = 10) and restored with cast post and core and glass-fiber posts with diameters of 1.5 mm and 1.1 mm. The fracture strength was evaluated using a Universal Testing Machine (Instron 1144) at 45° of angulation. The results were submitted to analysis of variance two-way and Tukey's test (P < 0.05). The failure mode was also evaluated.Results:Cast post and core were statistically superior to the glass-fiber posts with the self-post diameter (P = 0.001). When the self-post material was considered, no significant difference was observed between the two post-diameters (P = 0.749). The glass-fiber post-groups presented more fractures in the cervical third than the cast post and core groups.Conclusion:Teeth restored with cast post and cores present higher fracture strength than those reinforced with glass-fiber posts. An increased post-thickness does not increase the fracture strength. Glass-fiber posts lead to less severe fractures.

show abstract

“…18 Glass fiber posts are an alternative for the restoration of teeth with IR due they have modulus of elasticity similar to dentine. 19,20 The use of an apical plug with MTA has been suggested for endodontic therapy of teeth with IR, [21][22][23] resulting in a faster treatment and inducing the mineralized tissue formation in the root apex. 24 The root canal filling using Epiphany/…”

Section: 10mentioning

confidence: 99%

Resistance of Teeth with Simulated Incomplete Rhizogenesis with Intraradicular Post or Root Canal Filling

Tanomaru‐Filho

Sivieri-Araújo²,

Guerreiro-Tanomaru

et al. 2014

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

Aim: The aim of this study was to evaluate the fracture strength (FS) of bovine incisors with simulated incomplete rhizogenesis (IR) after different intraradicular treatments. Materials and methods:Incomplete rhizogenesis was simulated by sectioning the crowns and roots of 40 bovine incisors. Root canal preparation was performed and the samples divided into 4 groups (n = 10): GI-negative control with intra-radicular preparation; GII-positive control without intra-radicular preparation; GIII-glass fiber post cemented with resin cement and GIVroot canal obturation with Epiphany/Resilon system. In GIII and GIV, 4.0 mm apical plugs of mineral trioxide aggregate (MTA) were done. The samples were embedded into cylinders with polystyrene resin, and the periodontal ligament was simulated with a medium-viscosity polyether-based impression material (Impregum Soft). The specimens were submitted to compressive fracture strength test (0.5 mm/min at 135º in relation to the long axis of the tooth) in a mechanical testing machine MTS 810. Data were submitted to ANOVA and Tukey's test (α = 0.05).Results: GIII produced the highest FS values (p < 0.05). GI and GIV showed similar FS results (p > 0.05) but smaller than GII (p < 0.05). Conclusion:Glass fiber intraradicular posts provided the FS increase of teeth with simulated incomplete rhizogenesis. Epiphany/Resilon root canal filling with MTA plug did not provide the increase of the fracture strength to teeth with simulated incomplete rhizogenesis. Clinical significance:The fiber post reinforces the root structure of teeth with incomplete rhizogenesis.

show abstract

Fracture resistance of thin‐walled roots restored with different post systems

Cited by 46 publications

References 22 publications

Zirconia ceramic post systems: a literature review and a case report

Zirconia ceramic post systems: a literature review and a case report

Influence of post-thickness and material on the fracture strength of teeth with reduced coronal structure

Resistance of Teeth with Simulated Incomplete Rhizogenesis with Intraradicular Post or Root Canal Filling

Contact Info

Product

Resources

About