Influence of periodontal ligament simulation on bond strength and fracture resistance of roots restored with fiber posts

Marchionatti, Ana Maria Estivalete; Wandscher, Vinícius Felipe; Broch, Juliana; Bergoli, César Dalmolin; Maier, Juliana; Valandro, Luiz Felipe; Kaizer, Osvaldo Bazzan

doi:10.1590/1678-775720140067

Cited by 38 publications

(37 citation statements)

References 25 publications

(60 reference statements)

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“…Although Marchionatti et al 33) stated that no differences were found between the groups with and without periodontal ligament for the fracture resistance of roots treated with fiber post, Soares et al 51) reported that periodontal ligament affected the fracture resistance and fracture modes by behaving as a stress absorber. The authors of this study preferred to use periodontal ligament simulation prior to the fracture strength analysis of endocrowns, in order to better simulate the real tooth behavior against masticatory forces.…”

Section: Discussionmentioning

confidence: 99%

“…Whereas periodontal ligament simulation was used in some literatures 33,50) , there are studies which reported that periodontal ligament is challenging in terms of thickness standardization and stability 14,35,37) . Although Marchionatti et al 33) stated that no differences were found between the groups with and without periodontal ligament for the fracture resistance of roots treated with fiber post, Soares et al 51) reported that periodontal ligament affected the fracture resistance and fracture modes by behaving as a stress absorber.…”

Section: Discussionmentioning

confidence: 99%

“…Following 48 h storage in distilled water, the specimens were subjected to thermal cycling at temperatures of 5 and 55°C for a total of 5,000 cycles. Dwell time at each temperature was 30 s, and transfer time was 2 s. Prior to the mechanical fracture test, roots of teeth were covered with a 0.2-mm layer of polyether impression material (Impregum Garant L DuoSoft, 3M ESPE) to simulate the periodontal ligament (PDL) 33) and embedded in an auto-polymerizing acrylic resin (Meliodent, Heraeus Kulzer, Hanau, Germany) up to 2-mm below the cementoenamel junction.…”

Section: Preparation Of Endocrownsmentioning

confidence: 99%

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Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

Kanat‐Ertürk

Sarıdağ

Köseler

et al. 2018

Dental Materials Journal

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The objectives of this study were to compare the fracture strength of endocrown restorations fabricated with different preparation depth and various CAD/CAM ceramics, and to assess the fracture types. Endodontically treated 100 extracted human permanent maxillary centrals were divided into two preparation depth groups as short (S: 3-mm-deep) and long (L: 6-mm-deep), then five ceramic subgroups, namely: feldspathic-ceramic (Vita Mark II-VM2), lithium-disilicate glass-ceramic (IPS e.max CAD-E.max), resin-ceramic (LAVA Ultimate-LU), polymer infiltrated ceramic (Vita Enamic-VE) and monoblock zirconia (inCoris TZI-TZI) (n=10/subgroup). The endocrowns were fabricated by CAD/CAM and were cemented with resin cement (RelyX U200). The teeth were thermally cycled (5,000cycles) and fracture tests were performed at 45º angle to the teeth. The data were statistically analyzed (Kruskal-Wallis, Mann Whitney U), failure modes were evaluated with stereomicroscopy. Zirconia group provided the statistically highest fracture strength, but also exhibited non-repairable failures. Preparation depth has an effect on the fracture strength only for feldspathic ceramic.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Preparation Of Endocrownsmentioning

confidence: 99%

See 1 more Smart Citation

Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

Kanat‐Ertürk

Sarıdağ

Köseler

et al. 2018

Dental Materials Journal

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“…All teeth were mounted in epoxy resin (IN2 INFUSION; Easy Composites, USA) blocks using a plastic ring (25 × 35 mm). To simulate the function of the periodontium, the root was covered with thin layer of condensation silicone (Zetaplus; Zhermack-SpA, Italy) 10 . A specially designed centralizing device was fabricated to allow accurate centralization of the tooth in the plastic ring during construction of the epoxy resin block ( Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Wear assessment of current aesthetic crowns compared with human enamel after two finishing procedures: In vitro study

et al. 2019

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Surfaces of ceramic crowns are modified several times Background: before being exposed to wear in the oral cavity. Grinding and different finishing procedures may be associated with teeth wear due to increased surface roughness. Limited data is available with regard to the effect of polishing procedures on the surface roughness and wear behavior of ceramic crowns. This study was conducted to assess the influence of polished and polished-ground-repolished surface finish on the roughness and wear performance of three ceramic crowns.36 natural 1st molar teeth were prepared using a CNC milling Methods: machine and classified into three groups (n=12/group): zirconia,

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“…Crosshead speeds vary from 0.01 mm/min to 10 mm/min and various studies were performed to study the influence of test speed on the bond strength tests [70,75,85,98,135,145,146,[161][162][163][164][165][166][167][168]172]. Unlike controversial results of the macro-tests, when measuring micro-tensile bond strengths, some studies have reported that the influence of crosshead speed is insignificant [167,168].…”

Section: Crosshead Speedsmentioning

confidence: 99%

Test methods for bond strength of glass fiber posts to dentin: A review

Santos

Carlo

Barros

2016

The Journal of Adhesion

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In this paper, a review of the test methods for bond strength of glass fiber posts to dentin is presented. The main variables that influence the bond strength tests are related to substrate, to specimen properties, specimen preparation and test methodology. The impact of these variables on the test outcome is analyzed. The search was performed on studies published between 2007 and 2015. Most of the tests carried out, in the literature, were the push-out (75%), pull-out (13%) and microtensile (11,9%) tests, showing an inversion compared to the results found in studies published between 2005 and 2010, when push-out test was used in a proportion of 2% and microtensile test in a proportion of 67%. The push-out test emerged as a practical tool for evaluating the interfacial shear strength between fiber post and root canal walls.Fiber posts have been widely used in endodontically treated teeth in the last years. One of the advantages of using fiber posts is the use of adhesive bonding technique, which requires minimal intervention on the dentin surface. In addition, fiber posts have an elastic modulus similar to dentin, resulting in more homogeneous stress distribution along the root canal system. Thus, fiber post minimizes the risk of root fractures and lead to more favorable failure mode than metallic posts.The durability of restored endodontically treated teeth depends on many basic factors [1] including the amount of remaining coronal structure, restorative procedures and the materials used [2,3], which appear to be the key factors affecting the longevity of the tooth. Although low percentage failure rates and satisfactory clinical performance have been reported when fiber posts were used [4, 5, 6], pulpless teeth are still considered more vulnerable and susceptible to fracture in comparison to vital teeth [7].The clinical success of a recovery depends on the quality and durability of the bonding joint between the fiber post and the tooth structure. Therefore, it is fundamental that the test method used to evaluate the bond strength provides accurate information on the materials performance [8]. Reviews published in the decades of 1990 and 2010 [9-13] showed a relationship between the conditions for adhesion of post to the substrate, including cement application mode, post pretreatment and sample storage conditions, but only few discussed the variables that influence the bond strength tests. Downloaded by [Florida Atlantic University] at 16:14 06 June 2016 A c c e p t e d M a n u s c r i p t 3The bond strength tests might be influenced by many variables which include: the specimen design, the size of the adhesion surface area, the loading configuration and the type of materials [2,[16][17][18]. The high modulus of elasticity of a bonded composite, the thickness of the adhesive layer between the dentin of the root canal and the post, the format of post and the canal, among others, are variables that influence the stress distribution along the bonded interface [3,18,19] and consequently the outcome of the bond streng...

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Influence of periodontal ligament simulation on bond strength and fracture resistance of roots restored with fiber posts

Cited by 38 publications

References 25 publications

Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

Wear assessment of current aesthetic crowns compared with human enamel after two finishing procedures: In vitro study

Test methods for bond strength of glass fiber posts to dentin: A review

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